path: root/doc/rfc/rfc4750.txt

Network Working Group                                      D. Joyal, Ed.
Request for Comments: 4750                                        Nortel
Obsoletes: 1850                                          P. Galecki, Ed.
Category: Standards Track                                        Airvana
                                                       S. Giacalone, Ed.
                                                                    CSFB
                                                    Original Authors:
                                                               R. Coltun
                                                          Touch Acoustra
                                                                F. Baker
                                                           Cisco Systems
                                                           December 2006


              OSPF Version 2 Management Information Base

Status of This Memo

   This document specifies an Internet standards track protocol for the
   Internet community, and requests discussion and suggestions for
   improvements.  Please refer to the current edition of the "Internet
   Official Protocol Standards" (STD 1) for the standardization state
   and status of this protocol.  Distribution of this memo is unlimited.

Copyright Notice

   Copyright (C) The IETF Trust (2006).

 Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in TCP/IP-based internets.
   In particular, it defines objects for managing version 2 of the Open
   Shortest Path First Routing Protocol.  Version 2 of the OSPF protocol
   is specific to the IPv4 address family.  Version 3 of the OSPF
   protocol is specific to the IPv6 address family.

   This memo obsoletes RFC 1850; however, it is designed to be backwards
   compatible.  The functional differences between this memo and RFC
   1850 are explained in Appendix B.











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Table of Contents

   1. Overview ........................................................3
      1.1. The Internet-Standard Management Framework .................3
      1.2. Conceptual Row Creation ....................................3
      1.3. Default Configuration ......................................4
      1.4. OSPF Counters ..............................................5
      1.5. Multiple OSPF Instances ....................................5
      1.6. Conventions ................................................6
   2. Structure of This MIB ...........................................6
      2.1. The Purposes of the Sections in This MIB ...................6
           2.1.1. General Variables ...................................6
           2.1.2. Area Data Structure and Area Stub Metric Table ......6
           2.1.3. Link State Database and External Link State
                  Database ............................................7
           2.1.4. Address Table and Host Tables .......................7
           2.1.5. Interface and Interface Metric Tables ...............7
           2.1.6. Virtual Interface Table .............................7
           2.1.7. Neighbor and Virtual Neighbor Tables ................7
           2.1.8. Local Link State Database Table and Virtual
                  Local Link State Database Table .....................7
           2.1.9. AS-scope Link State Database Table ..................7
           2.1.10. Area LSA Count Table ...............................7
   3. OSPF MIB Module .................................................8
   4. OSPF Trap Overview .............................................94
      4.1. Introduction ..............................................94
      4.2. Approach ..................................................95
      4.3. Ignoring Initial Activity .................................95
      4.4. Throttling Traps ..........................................95
      4.5. One Trap Per OSPF Event ...................................96
      4.6. Polling Event Counters ....................................96
      4.7. Translating Notification Parameters .......................97
      4.8. Historical Artifacts ......................................97
   5. OSPF Trap Definitions ..........................................98
   6. Security Considerations .......................................110
   7. IANA Considerations ...........................................111
   8. Acknowledgements ..............................................111
   9. References ....................................................111
      9.1. Normative References .....................................111
      9.2. Informative References ...................................111
   Appendix A. TOS Support ..........................................113
   Appendix B. Changes from RFC 1850 ................................113
      B.1. General Group Changes ....................................113
      B.2. OSPF NSSA Enhancement Support ............................113
      B.3. Opaque LSA Support .......................................114
      B.4. Graceful Restart Support .................................116
      B.5. OSPF Compliances .........................................116
      B.6. OSPF Authentication and Security .........................117



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      B.7. OSPF Trap MIB ............................................117
      B.8. Miscellaneous ............................................118

1.  Overview

1.1.  The Internet-Standard Management Framework

   For a detailed overview of the documents that describe the current
   Internet-Standard Management Framework, please refer to section 7 of
   RFC 3410 [RFC3410].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  MIB objects are generally
   accessed through the Simple Network Management Protocol (SNMP).
   Objects in the MIB are defined using the mechanisms defined in the
   Structure of Management Information (SMI).  This memo specifies a MIB
   module that is compliant to the SMIv2, which is described in STD 58,
   RFC 2578 [RFC2578], STD 58, RFC 2579 [RFC2579] and STD 58, RFC 2580
   [RFC2580].

1.2.  Conceptual Row Creation

   For the benefit of row-creation in "conceptual" tables, DEFVAL
   (Default Value) clauses are included in the definitions in section 3,
   suggesting values that an agent should use for instances of variables
   that need to be created due to a Set-Request, but that are not
   specified in the Set-Request.  DEFVAL clauses have not been specified
   for some objects that are read-only, implying that they are zeroed
   upon row creation.  These objects are of the SYNTAX Counter32 or
   Gauge32.

   For those objects not having a DEFVAL clause, both management
   stations and agents should heed the Robustness Principle of the
   Internet (see [RFC791]):

   "be liberal in what you accept, conservative in what you send"

   Therefore, management stations should include as many of these
   columnar objects as possible (e.g., all read-write objects) in a
   Set-Request when creating a conceptual row.  Agents should accept a
   Set-Request with as few of these columnar objects as they need (e.g.,
   the minimum contents of a "row-creating" SET consists of those
   objects for which, as they cannot be intuited, no default is
   specified).







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1.3.  Default Configuration

   OSPF is a powerful routing protocol, equipped with features to handle
   virtually any configuration requirement that might reasonably be
   found within an Autonomous System (AS).  With this power comes a fair
   degree of complexity, which the sheer number of objects in the MIB
   will attest to.  Care has therefore been taken, in constructing this
   MIB, to define default values for virtually every object, to minimize
   the amount of parameterization required in the typical case.  That
   default configuration is as follows:

   Given the following assumptions:

   - IP has already been configured.

   - The ifTable has already been configured.

   - ifSpeed is estimated by the interface drivers.

   - The OSPF process automatically discovers all IP interfaces and
     creates corresponding OSPF interfaces.

   - The OSPF process automatically creates the areas required for the
     interfaces.

   The simplest configuration of an OSPF process requires the following:

   - The OSPF process be enabled.

   This can be accomplished with a single SET:

      ospfAdminStat := enabled.

   The configured system will have the following attributes:

   - The RouterID will be one of the IP addresses of the device.

   - The device will be neither an Area Border Router nor an Autonomous
     System Border Router.

   - Every IP interface, with or without an address, will be an OSPF
     interface.

   - The AreaID of each interface will be 0.0.0.0, the backbone.

   - Authentication will be disabled.





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   - All broadcast and point-to-point interfaces will be operational.
     Non-broadcast multi-access (NBMA) interfaces require the
     configuration of at least one neighbor.

   - Timers on all direct interfaces will be:

     Hello Interval:        10 seconds
     Dead Timeout:          40 Seconds
     Retransmission:         5 Seconds
     Transit Delay:          1 Second
     Poll Interval:        120 Seconds

   - No direct links to hosts will be configured.

   - No addresses will be summarized.

   - Metrics, being a measure of bit duration, are unambiguous and
     intelligent.

   - No virtual links will be configured.

1.4.  OSPF Counters

   This MIB defines several counters, namely:

   - ospfOriginateNewLsas, ospfRxNewLsas in the ospfGeneralGroup
   - ospfSpfRuns, ospfAreaNssaTranslatorEvents in the ospfAreaTable
   - ospfIfEvents in the ospfIfTable
   - ospfVirtIfEvents in the ospfVirtIfTable
   - ospfNbrEvents in the ospfNbrTable
   - ospfVirtNbrEvents in the ospfVirtNbrTable

   As a best practice, a management entity, when reading these counters,
   should use the discontinuity object, ospfDiscontinuityTime, to
   determine if an event that would invalidate the management entity
   understanding of the counters has occurred.  A restart of the OSPF
   routing process is a possible example of a discontinuity event.

1.5.  Multiple OSPF Instances

   SNMPv3 supports "Contexts" that can be used to implement MIB views on
   multiple OSPF instances on the same system.  See [RFC3411] or its
   successors for details.








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1.6.  Conventions

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

2.  Structure of This MIB

   This MIB is composed of the following sections:

      General Variables
      Area Data Structure
      Area Stub Metric Table
      Link State Database (LSDB)
      Address Range Table
      Host Table
      Interface Table
      Interface Metric Table
      Virtual Interface Table
      Neighbor Table
      Virtual Neighbor Table
      External Link State Database
      Aggregate Range Table
      Local Link State Database
      AS-scope Link State Database

   It supports the base OSPFv2 specification [RFC2328] and extensions to
   OSPFv2 such as [RFC1765], [RFC1793], [RFC2370], [RFC3101] and
   [RFC3623].

   There exists a separate MIB for notifications ("traps"), which is
   entirely optional.

2.1.  The Purposes of the Sections in This MIB

2.1.1.  General Variables

   The general variables describe (as it may seem from the name)
   variables that are global to the OSPF Process.

2.1.2.  Area Data Structure and Area Stub Metric Table

   The Area Data Structure describes all of the OSPF Areas that the
   router participates in.  The Area Table includes data for Not-So-
   Stubby-Area (NSSA) translation.

   The Area Stub Metric Table describes the metrics advertised into a
   stub area by the default router(s).



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2.1.3.  Link State Database and External Link State Database

   The link state database is provided primarily to provide detailed
   information for network debugging.

2.1.4.  Address Table and Host Tables

   The Address Range Table and Host Table are provided to view
   configured Network Summary and host route information.

2.1.5.  Interface and Interface Metric Tables

   The Interface Table and the Interface Metric Table together describe
   the various IP interfaces to OSPF.  The metrics are placed in
   separate tables in order to simplify dealing with multiple types of
   service.  The Interface table includes link-local (Opaque type-9)
   link state advertisement (LSA) statistics.

2.1.6.  Virtual Interface Table

   The Virtual Interface Table describes virtual links to the OSPF
   Process, similarly to the (non-virtual) Interface Tables.  This Table
   includes link-local (Opaque type-9) LSA statistics.

2.1.7.  Neighbor and Virtual Neighbor Tables

   The Neighbor Table and the Virtual Neighbor Table describe the
   neighbors to the OSPF Process.

2.1.8.  Local Link State Database Table and Virtual Local Link State
        Database Table

   The Local Link State Database Table and Virtual Local Link State
   Database Table are identical to the OSPF LSDB Table in format, but
   contain only link-local (Opaque type-9) link state advertisements for
   non-virtual and virtual links.

2.1.9.  AS-scope Link State Database Table

   The AS-scope Link State Database Table is identical to the OSPF LSDB
   Table in format, but contains only AS-scoped link state
   advertisements.

2.1.10.  Area LSA Count Table

   The table, which maintains number of link state advertisements on the
   per-area, per-LSA-type basis.




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3.  OSPF MIB Module

OSPF-MIB DEFINITIONS ::= BEGIN

IMPORTS
    MODULE-IDENTITY, OBJECT-TYPE, Counter32, Gauge32,
    Integer32, Unsigned32, IpAddress, mib-2
                 FROM SNMPv2-SMI
    TEXTUAL-CONVENTION, TruthValue, RowStatus, TimeStamp
                 FROM SNMPv2-TC
    MODULE-COMPLIANCE, OBJECT-GROUP
                 FROM SNMPv2-CONF
    InterfaceIndexOrZero
                 FROM IF-MIB;

ospf MODULE-IDENTITY
       LAST-UPDATED "200611100000Z" -- November 10, 2006 00:00:00 EST
       ORGANIZATION "IETF OSPF Working Group"
       CONTACT-INFO
       "WG E-Mail: ospf@ietf.org

        WG Chairs: acee@cisco.com
                   rohit@gmail.com

        Editors:   Dan Joyal
                   Nortel
                   600 Technology Park Drive
                   Billerica, MA  01821
                   djoyal@nortel.com

                   Piotr Galecki
                   Airvana
                   19 Alpha Road
                   Chelmsford, MA 01824
                   pgalecki@airvana.com

                   Spencer Giacalone
                   CSFB
                   Eleven Madison Ave
                   New York, NY 10010-3629
                   spencer.giacalone@gmail.com"

       DESCRIPTION
          "The MIB module to describe the OSPF Version 2
          Protocol.  Note that some objects in this MIB
          module may pose a significant security risk.
          Refer to the Security Considerations section
          in RFC 4750 for more information.



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          Copyright (C) The IETF Trust (2006).
          This version of this MIB module is part of
          RFC 4750;  see the RFC itself for full legal
          notices."

       REVISION "200611100000Z" -- November 10, 2006 09:00:00 EST
       DESCRIPTION
         "Updated for latest changes to OSPF Version 2:
          - updated the General Group with the new
            ospfRFC1583Compatibility, ospfReferenceBandwidth
            and ospfDiscontinuityTime objects
          - added graceful-restart-related objects
          - added stub-router-related objects
          - updated the Area Table with NSSA-related objects
          - added ospfAreaAggregateExtRouteTag object
          - added Opaque LSA-related objects
          - updates to the Compliances and Security sections
          - added area LSA counter table
          - added section describing translation of notification
            parameters between SNMP versions
          - added ospfComplianceObsolete to contain obsolete
            object groups
          - deprecated ospfExtLsdbTable
          See Appendix B of RFC 4750 for more details.

          This version published as part of RFC 4750"

       REVISION "199501201225Z" -- Fri Jan 20 12:25:50 PST 1995
       DESCRIPTION
          "The initial SMIv2 revision of this MIB module, published
          in RFC 1850."
       ::= { mib-2 14 }

AreaID ::= TEXTUAL-CONVENTION
       STATUS       current
       DESCRIPTION
          "An OSPF Area Identifier.
           Note that the Area ID, in OSPF, has the same format
           as an IP address, but has the function of defining
           a summarization point for link state advertisements."
       SYNTAX       IpAddress

RouterID ::= TEXTUAL-CONVENTION
       STATUS       current
       DESCRIPTION
          "A OSPF Router Identifier.
           Note that the Router ID, in OSPF, has the same format
           as an IP address, but identifies the router independent



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           of its IP address."
       SYNTAX       IpAddress

Metric ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d-0"
       STATUS       current
       DESCRIPTION
          "The OSPF internal metric.
           Note that the OSPF metric is defined as an unsigned value
           in the range."
       SYNTAX       Integer32 (0..'FFFF'h)

BigMetric ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d-0"
       STATUS       current
       DESCRIPTION
          "The OSPF external metric."
       SYNTAX       Integer32 (0..'FFFFFF'h)

Status ::= TEXTUAL-CONVENTION
       STATUS       current
       DESCRIPTION
          "An indication of the operability of an OSPF
          function or feature.  For example, the status
          of an interface: 'enabled' indicates that
          it is willing to communicate with other OSPF routers,
          and 'disabled' indicates that it is not."
       SYNTAX       INTEGER { enabled (1), disabled (2) }

PositiveInteger ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d-0"
       STATUS       current
       DESCRIPTION
          "A positive integer.  Values in excess are precluded as
          unnecessary and prone to interoperability issues."
       SYNTAX       Integer32 (0..'7FFFFFFF'h)

HelloRange ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d-0"
       STATUS       current
       DESCRIPTION
          "The range of intervals in seconds on which Hello messages
          are exchanged."
       SYNTAX       Integer32 (1..'FFFF'h)

UpToMaxAge ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d-0"
       STATUS       current



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       DESCRIPTION
          "The values in seconds that one might find or configure
          for variables bounded by the maximum age of an LSA."
       SYNTAX       Integer32 (0..3600)

DesignatedRouterPriority ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d-0"
       STATUS       current
       DESCRIPTION
          "The range of values defined for the priority of a system
          for becoming the designated router."
       SYNTAX       Integer32 (0..'FF'h)

TOSType ::= TEXTUAL-CONVENTION
       DISPLAY-HINT "d-0"
       STATUS      current
       DESCRIPTION
        "Type of Service (TOS) is defined as a mapping to the IP
        Type of Service Flags as defined in the IP Forwarding
        Table MIB

            +-----+-----+-----+-----+-----+-----+-----+-----+
            |                 |                       |     |
            |   PRECEDENCE    |    TYPE OF SERVICE    |  0  |
            |                 |                       |     |
            +-----+-----+-----+-----+-----+-----+-----+-----+

                     IP TOS                IP TOS
                Field     Policy      Field     Policy

                Contents    Code      Contents    Code
                0 0 0 0  ==>   0      0 0 0 1  ==>   2
                0 0 1 0  ==>   4      0 0 1 1  ==>   6
                0 1 0 0  ==>   8      0 1 0 1  ==>  10
                0 1 1 0  ==>  12      0 1 1 1  ==>  14
                1 0 0 0  ==>  16      1 0 0 1  ==>  18
                1 0 1 0  ==>  20      1 0 1 1  ==>  22
                1 1 0 0  ==>  24      1 1 0 1  ==>  26
                1 1 1 0  ==>  28      1 1 1 1  ==>  30

         The remaining values are left for future definition."
           SYNTAX       Integer32 (0..30)

OspfAuthenticationType ::= TEXTUAL-CONVENTION
       STATUS       current
       DESCRIPTION
          "The authentication type."
       SYNTAX       INTEGER {



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                       none (0),
                       simplePassword (1),
                       md5 (2)
                       -- reserved for specification by IANA (> 2)
                    }

--  OSPF General Variables

--      Note: These parameters apply globally to the Router's
--      OSPF Process.

ospfGeneralGroup OBJECT IDENTIFIER ::= { ospf 1 }

  ospfRouterId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "A 32-bit integer uniquely identifying the
          router in the Autonomous System.
          By convention, to ensure uniqueness, this
          should default to the value of one of the
          router's IP interface addresses.

          This object is persistent and when written
          the entity SHOULD save the change to non-volatile storage."
       REFERENCE
          "OSPF Version 2, C.1 Global parameters"
       ::= { ospfGeneralGroup 1 }

  ospfAdminStat OBJECT-TYPE
       SYNTAX       Status
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "The administrative status of OSPF in the
          router.  The value 'enabled' denotes that the
          OSPF Process is active on at least one interface;
          'disabled' disables it on all interfaces.

          This object is persistent and when written
          the entity SHOULD save the change to non-volatile storage."
       ::= { ospfGeneralGroup 2 }

  ospfVersionNumber OBJECT-TYPE
       SYNTAX       INTEGER { version2 (2) }
       MAX-ACCESS   read-only
       STATUS       current



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       DESCRIPTION
          "The current version number of the OSPF protocol is 2."
       REFERENCE
          "OSPF Version 2, Title"
       ::= { ospfGeneralGroup 3 }

  ospfAreaBdrRtrStatus OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "A flag to note whether this router is an Area
          Border Router."
       REFERENCE
          "OSPF Version 2, Section 3 Splitting the AS into
          Areas"
       ::= { ospfGeneralGroup 4 }

  ospfASBdrRtrStatus OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "A flag to note whether this router is configured as
           an Autonomous System Border Router.

           This object is persistent and when written the
           entity SHOULD save the change to non-volatile storage."
       REFERENCE
          "OSPF Version 2, Section 3.3 Classification of
          routers"
       ::= { ospfGeneralGroup 5 }

  ospfExternLsaCount OBJECT-TYPE
        SYNTAX       Gauge32
        MAX-ACCESS   read-only
        STATUS       current
        DESCRIPTION
           "The number of external (LS type-5) link state
           advertisements in the link state database."
        REFERENCE
           "OSPF Version 2, Appendix A.4.5 AS external link
           advertisements"
        ::= { ospfGeneralGroup 6 }

  ospfExternLsaCksumSum OBJECT-TYPE
        SYNTAX       Integer32
        MAX-ACCESS   read-only



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        STATUS       current
        DESCRIPTION
           "The 32-bit sum of the LS checksums of
           the external link state advertisements
           contained in the link state database.  This sum
           can be used to determine if there has been a
           change in a router's link state database and
           to compare the link state database of two
           routers.  The value should be treated as unsigned
           when comparing two sums of checksums."
        ::= { ospfGeneralGroup 7 }

  ospfTOSSupport OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "The router's support for type-of-service routing.

           This object is persistent and when written
           the entity SHOULD save the change to non-volatile
           storage."
       REFERENCE
          "OSPF Version 2, Appendix F.1.2 Optional TOS
          support"
       ::= { ospfGeneralGroup 8 }

   ospfOriginateNewLsas OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The number of new link state advertisements
          that have been originated.  This number is
          incremented each time the router originates a new
          LSA.

          Discontinuities in the value of this counter can
          occur at re-initialization of the management system,
          and at other times as indicated by the value of
          ospfDiscontinuityTime."
        ::= { ospfGeneralGroup 9 }

  ospfRxNewLsas OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION



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          "The number of link state advertisements received
          that are determined to be new instantiations.
          This number does not include newer instantiations
          of self-originated link state advertisements.

          Discontinuities in the value of this counter can
          occur at re-initialization of the management system,
          and at other times as indicated by the value of
          ospfDiscontinuityTime."
       ::= { ospfGeneralGroup 10 }

  ospfExtLsdbLimit OBJECT-TYPE
       SYNTAX       Integer32 (-1..'7FFFFFFF'h)
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "The maximum number of non-default
          AS-external LSAs entries that can be stored in the
          link state database.  If the value is -1, then
          there is no limit.

          When the number of non-default AS-external LSAs
          in a router's link state database reaches
          ospfExtLsdbLimit, the router enters
          overflow state.  The router never holds more than
          ospfExtLsdbLimit non-default AS-external LSAs
          in its database.  OspfExtLsdbLimit MUST be set
          identically in all routers attached to the OSPF
          backbone and/or any regular OSPF area (i.e.,
          OSPF stub areas and NSSAs are excluded).

          This object is persistent and when written
          the entity SHOULD save the change to non-volatile
          storage."
        DEFVAL { -1 }
        ::= { ospfGeneralGroup 11 }

  ospfMulticastExtensions OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "A bit mask indicating whether the router is
          forwarding IP multicast (Class D) datagrams
          based on the algorithms defined in the
          multicast extensions to OSPF.

          Bit 0, if set, indicates that the router can



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          forward IP multicast datagrams in the router's
          directly attached areas (called intra-area
          multicast routing).

          Bit 1, if set, indicates that the router can
          forward IP multicast datagrams between OSPF
          areas (called inter-area multicast routing).

          Bit 2, if set, indicates that the router can
          forward IP multicast datagrams between
          Autonomous Systems (called inter-AS multicast
          routing).

          Only certain combinations of bit settings are
          allowed, namely: 0 (no multicast forwarding is
          enabled), 1 (intra-area multicasting only), 3
          (intra-area and inter-area multicasting), 5
          (intra-area and inter-AS multicasting), and 7
          (multicasting everywhere).  By default, no
          multicast forwarding is enabled.

          This object is persistent and when written
          the entity SHOULD save the change to non-volatile
          storage."
       DEFVAL { 0 }
       ::= { ospfGeneralGroup 12 }

  ospfExitOverflowInterval OBJECT-TYPE
       SYNTAX       PositiveInteger
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "The number of seconds that, after entering
          OverflowState, a router will attempt to leave
          OverflowState.  This allows the router to again
          originate non-default AS-external LSAs.  When
          set to 0, the router will not leave
          overflow state until restarted.

          This object is persistent and when written
          the entity SHOULD save the change to non-volatile
          storage."
       DEFVAL { 0 }
       ::= { ospfGeneralGroup 13 }

  ospfDemandExtensions OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-write



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       STATUS       current
       DESCRIPTION
          "The router's support for demand routing.
           This object is persistent and when written
           the entity SHOULD save the change to non-volatile
           storage."
       REFERENCE
          "Extending OSPF to Support Demand Circuits"
       ::= { ospfGeneralGroup 14 }

  ospfRFC1583Compatibility  OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "Indicates metrics used to choose among multiple
          AS-external LSAs.  When RFC1583Compatibility is set to
          enabled, only cost will be used when choosing among
          multiple AS-external LSAs advertising the same
          destination.  When RFC1583Compatibility is set to
          disabled, preference will be driven first by type of
          path using cost only to break ties.

          This object is persistent and when written
          the entity SHOULD save the change to non-volatile
          storage."
        REFERENCE
           "OSPF Version 2, Section 16.4.1 External path
            preferences"
        ::= { ospfGeneralGroup 15 }

 ospfOpaqueLsaSupport  OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The router's support for Opaque LSA types."
       REFERENCE
          "The OSPF Opaque LSA Option"
       ::= { ospfGeneralGroup 16 }

  ospfReferenceBandwidth OBJECT-TYPE
       SYNTAX       Unsigned32
       UNITS        "kilobits per second"
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "Reference bandwidth in kilobits/second for



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          calculating default interface metrics.  The
          default value is 100,000 KBPS (100 MBPS).

          This object is persistent and when written
          the entity SHOULD save the change to non-volatile
          storage."
       ::= { ospfGeneralGroup 17 }

  ospfRestartSupport OBJECT-TYPE
       SYNTAX       INTEGER { none (1),
                              plannedOnly (2),
                              plannedAndUnplanned (3)
                            }
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "The router's support for OSPF graceful restart.
          Options include: no restart support, only planned
          restarts, or both planned and unplanned restarts.

          This object is persistent and when written
          the entity SHOULD save the change to non-volatile
          storage."
       ::= { ospfGeneralGroup 18 }

  ospfRestartInterval OBJECT-TYPE
       SYNTAX       Integer32 (1..1800)
       UNITS        "seconds"
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "Configured OSPF graceful restart timeout interval.

           This object is persistent and when written
           the entity SHOULD save the change to non-volatile
           storage."
       ::= { ospfGeneralGroup 19 }

  ospfRestartStrictLsaChecking OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
          "Indicates if strict LSA checking is enabled for
           graceful restart.

           This object is persistent and when written
           the entity SHOULD save the change to non-volatile



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           storage."
       ::= { ospfGeneralGroup 20 }


  ospfRestartStatus OBJECT-TYPE
       SYNTAX       INTEGER { notRestarting (1),
                              plannedRestart (2),
                              unplannedRestart (3)
                            }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Current status of OSPF graceful restart."
       ::= { ospfGeneralGroup 21 }

  ospfRestartAge OBJECT-TYPE
       SYNTAX       Unsigned32
       UNITS        "seconds"
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Remaining time in current OSPF graceful restart
          interval."
       ::= { ospfGeneralGroup 22 }

  ospfRestartExitReason OBJECT-TYPE
       SYNTAX       INTEGER { none (1),           -- none attempted
                              inProgress (2),     -- restart in
                                                  -- progress
                              completed (3),      -- successfully
                                                  -- completed
                              timedOut (4),       -- timed out
                              topologyChanged (5) -- aborted due to
                                                  -- topology change.
                            }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Describes the outcome of the last attempt at a
          graceful restart.  If the value is 'none', no restart
          has yet been attempted.  If the value is 'inProgress',
          a restart attempt is currently underway."
       ::= { ospfGeneralGroup 23 }

  ospfAsLsaCount OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current



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       DESCRIPTION
           "The number of AS-scope link state
           advertisements in the AS-scope link state database."
       ::= { ospfGeneralGroup 24 }

  ospfAsLsaCksumSum OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
           "The 32-bit unsigned sum of the LS checksums of
           the AS link state advertisements contained in the AS-scope
           link state database.  This sum can be used to determine
           if there has been a change in a router's AS-scope link
           state database, and to compare the AS-scope link state
           database of two routers."
       ::= { ospfGeneralGroup 25 }

   ospfStubRouterSupport OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
           "The router's support for stub router functionality."
       REFERENCE
           "OSPF Stub Router Advertisement"
       ::= { ospfGeneralGroup 26 }

   ospfStubRouterAdvertisement OBJECT-TYPE
       SYNTAX       INTEGER {
                          doNotAdvertise (1),
                          advertise(2)
                          }
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION
           "This object controls the advertisement of
           stub router LSAs by the router.  The value
           doNotAdvertise will result in the advertisement
           of a standard router LSA and is the default value.

           This object is persistent and when written
           the entity SHOULD save the change to non-volatile
           storage."
       ::= { ospfGeneralGroup 27 }

  ospfDiscontinuityTime OBJECT-TYPE
      SYNTAX     TimeStamp



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      MAX-ACCESS read-only
      STATUS     current
      DESCRIPTION
         "The value of sysUpTime on the most recent occasion
          at which any one of this MIB's counters suffered
          a discontinuity.

          If no such discontinuities have occurred since the last
          re-initialization of the local management subsystem,
          then this object contains a zero value."
      ::= { ospfGeneralGroup 28 }


--  OSPF Area Table
--     The OSPF Area Table contains information
--     regarding the various areas.

  ospfAreaTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfAreaEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "Information describing the configured parameters and
          cumulative statistics of the router's attached areas.
          The interfaces and virtual links are configured
          as part of these areas.  Area 0.0.0.0, by definition,
          is the backbone area."
       REFERENCE
          "OSPF Version 2, Section 6 The Area Data Structure"
       ::= { ospf 2 }

  ospfAreaEntry OBJECT-TYPE
       SYNTAX       OspfAreaEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "Information describing the configured parameters and
          cumulative statistics of one of the router's attached areas.
          The interfaces and virtual links are configured as part of
          these areas.  Area 0.0.0.0, by definition, is the backbone
          area.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile
          storage."
       INDEX { ospfAreaId }
       ::= { ospfAreaTable 1 }




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  OspfAreaEntry ::=
        SEQUENCE {
           ospfAreaId
              AreaID,
           ospfAuthType
              OspfAuthenticationType,
           ospfImportAsExtern
              INTEGER,
           ospfSpfRuns
              Counter32,
           ospfAreaBdrRtrCount
              Gauge32,
           ospfAsBdrRtrCount
              Gauge32,
           ospfAreaLsaCount
              Gauge32,
           ospfAreaLsaCksumSum
              Integer32,
           ospfAreaSummary
              INTEGER,
           ospfAreaStatus
              RowStatus,
           ospfAreaNssaTranslatorRole
              INTEGER,
           ospfAreaNssaTranslatorState
              INTEGER,
           ospfAreaNssaTranslatorStabilityInterval
              PositiveInteger,
           ospfAreaNssaTranslatorEvents
              Counter32
           }

  ospfAreaId OBJECT-TYPE
       SYNTAX       AreaID
       MAX-ACCESS   read-only -- read-only since originally
                              -- an SMIv1 index
       STATUS       current
       DESCRIPTION
          "A 32-bit integer uniquely identifying an area.
          Area ID 0.0.0.0 is used for the OSPF backbone."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
       ::= { ospfAreaEntry 1 }

  ospfAuthType OBJECT-TYPE
       SYNTAX       OspfAuthenticationType
       MAX-ACCESS   read-create
       STATUS       obsolete



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       DESCRIPTION
          "The authentication type specified for an area."
       REFERENCE
          "OSPF Version 2, Appendix D Authentication"
       DEFVAL { none } -- no authentication, by default
       ::= { ospfAreaEntry 2 }

  ospfImportAsExtern OBJECT-TYPE
       SYNTAX       INTEGER {
                      importExternal (1),
                      importNoExternal (2),
                      importNssa (3)
                      }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "Indicates if an area is a stub area, NSSA, or standard
          area.  Type-5 AS-external LSAs and type-11 Opaque LSAs are
          not imported into stub areas or NSSAs.  NSSAs import
          AS-external data as type-7 LSAs"
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
       DEFVAL { importExternal }
       ::= { ospfAreaEntry 3 }

  ospfSpfRuns OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The number of times that the intra-area route
          table has been calculated using this area's
          link state database.  This is typically done
          using Dijkstra's algorithm.

          Discontinuities in the value of this counter can occur
          at re-initialization of the management system, and at other
          times as indicated by the value of ospfDiscontinuityTime."
       ::= { ospfAreaEntry 4 }

  ospfAreaBdrRtrCount OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The total number of Area Border Routers reachable
          within this area.  This is initially zero and is
          calculated in each Shortest Path First (SPF) pass."



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       ::= { ospfAreaEntry 5 }

  ospfAsBdrRtrCount OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The total number of Autonomous System Border
          Routers reachable within this area.  This is
          initially zero and is calculated in each SPF
          pass."
       ::= { ospfAreaEntry 6 }

  ospfAreaLsaCount OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The total number of link state advertisements
          in this area's link state database, excluding
          AS-external LSAs."
       ::= { ospfAreaEntry 7 }

  ospfAreaLsaCksumSum OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The 32-bit sum of the link state
          advertisements' LS checksums contained in this
          area's link state database.  This sum excludes
          external (LS type-5) link state advertisements.
          The sum can be used to determine if there has
          been a change in a router's link state
          database, and to compare the link state database of
          two routers.  The value should be treated as unsigned
          when comparing two sums of checksums."
       DEFVAL { 0 }
       ::= { ospfAreaEntry 8 }

  ospfAreaSummary OBJECT-TYPE
       SYNTAX       INTEGER {
                       noAreaSummary (1),
                       sendAreaSummary (2)
                       }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION



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          "The variable ospfAreaSummary controls the
          import of summary LSAs into stub and NSSA areas.
          It has no effect on other areas.

          If it is noAreaSummary, the router will not
          originate summary LSAs into the stub or NSSA area.
          It will rely entirely on its default route.

          If it is sendAreaSummary, the router will both
          summarize and propagate summary LSAs."
       DEFVAL { noAreaSummary }
       ::= { ospfAreaEntry 9 }

  ospfAreaStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
       ::= { ospfAreaEntry 10 }

  ospfAreaNssaTranslatorRole OBJECT-TYPE
       SYNTAX       INTEGER { always (1), candidate (2) }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "Indicates an NSSA border router's ability to
          perform NSSA translation of type-7 LSAs into
          type-5 LSAs."
       DEFVAL { candidate }
       ::= { ospfAreaEntry 11 }

  ospfAreaNssaTranslatorState OBJECT-TYPE
       SYNTAX       INTEGER { enabled (1),
                       elected (2),
                       disabled (3)
                       }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Indicates if and how an NSSA border router is
          performing NSSA translation of type-7 LSAs into type-5



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          LSAs.  When this object is set to enabled, the NSSA Border
          router's OspfAreaNssaExtTranslatorRole has been set to
          always.  When this object is set to elected, a candidate
          NSSA Border router is Translating type-7 LSAs into type-5.
          When this object is set to disabled, a candidate NSSA
          border router is NOT translating type-7 LSAs into type-5."
       ::= { ospfAreaEntry 12 }

  ospfAreaNssaTranslatorStabilityInterval OBJECT-TYPE
       SYNTAX       PositiveInteger
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The number of seconds after an elected translator
          determines its services are no longer required, that
          it should continue to perform its translation duties."
       DEFVAL { 40 }
       ::= { ospfAreaEntry 13 }

  ospfAreaNssaTranslatorEvents OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Indicates the number of translator state changes
          that have occurred since the last boot-up.

          Discontinuities in the value of this counter can occur
          at re-initialization of the management system, and at other
          times as indicated by the value of ospfDiscontinuityTime."
       ::= { ospfAreaEntry 14 }

--  OSPF Area Default Metric Table

  ospfStubAreaTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfStubAreaEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The set of metrics that will be advertised
          by a default Area Border Router into a stub area."
       REFERENCE
          "OSPF Version 2, Appendix C.2, Area Parameters"
       ::= { ospf 3 }

  ospfStubAreaEntry OBJECT-TYPE
       SYNTAX       OspfStubAreaEntry



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       MAX-ACCESS   not-accessible
       STATUS      current
       DESCRIPTION
          "The metric for a given Type of Service that
          will be advertised by a default Area Border
          Router into a stub area.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile
          storage."
       REFERENCE
          "OSPF Version 2, Appendix C.2, Area Parameters"
       INDEX { ospfStubAreaId, ospfStubTOS }
       ::= { ospfStubAreaTable 1 }

  OspfStubAreaEntry ::=
       SEQUENCE {
          ospfStubAreaId
             AreaID,
          ospfStubTOS
             TOSType,
          ospfStubMetric
             BigMetric,
          ospfStubStatus
             RowStatus,
          ospfStubMetricType
             INTEGER
          }

  ospfStubAreaId OBJECT-TYPE
       SYNTAX       AreaID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The 32-bit identifier for the stub area.  On
          creation, this can be derived from the
          instance."
       ::= { ospfStubAreaEntry 1 }

  ospfStubTOS OBJECT-TYPE
       SYNTAX       TOSType
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The Type of Service associated with the
          metric.  On creation, this can be derived from



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          the instance."
       ::= { ospfStubAreaEntry 2 }

  ospfStubMetric OBJECT-TYPE
       SYNTAX       BigMetric
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The metric value applied at the indicated Type
          of Service.  By default, this equals the least
          metric at the Type of Service among the
          interfaces to other areas."
       ::= { ospfStubAreaEntry 3 }

  ospfStubStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
       ::= { ospfStubAreaEntry 4 }

  ospfStubMetricType OBJECT-TYPE
       SYNTAX       INTEGER {
                       ospfMetric (1),  -- OSPF Metric
                       comparableCost (2), -- external type 1
                       nonComparable  (3) -- external type 2
                       }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This variable displays the type of metric
          advertised as a default route."
       DEFVAL { ospfMetric }
       ::= { ospfStubAreaEntry 5 }

--  OSPF Link State Database

  ospfLsdbTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS       current



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       DESCRIPTION
          "The OSPF Process's link state database (LSDB).
           The LSDB contains the link state advertisements
           from throughout the areas that the device is attached to."
       REFERENCE
          "OSPF Version 2, Section 12 Link State Advertisements"
       ::= { ospf 4 }

  ospfLsdbEntry OBJECT-TYPE
       SYNTAX   OspfLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS   current
       DESCRIPTION
          "A single link state advertisement."
       INDEX { ospfLsdbAreaId, ospfLsdbType,
               ospfLsdbLsid, ospfLsdbRouterId }
       ::= { ospfLsdbTable 1 }

  OspfLsdbEntry ::=
       SEQUENCE {
          ospfLsdbAreaId
             AreaID,
          ospfLsdbType
             INTEGER,
          ospfLsdbLsid
             IpAddress,
          ospfLsdbRouterId
             RouterID,
          ospfLsdbSequence
             Integer32,
          ospfLsdbAge
             Integer32,
          ospfLsdbChecksum
             Integer32,
          ospfLsdbAdvertisement
             OCTET STRING
          }

  ospfLsdbAreaId OBJECT-TYPE
       SYNTAX       AreaID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The 32-bit identifier of the area from which
          the LSA was received."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"



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       ::= { ospfLsdbEntry 1 }

  ospfLsdbType OBJECT-TYPE
       SYNTAX       INTEGER {
                       routerLink (1),
                       networkLink (2),
                       summaryLink (3),
                       asSummaryLink (4),
                       asExternalLink (5), -- but see ospfAsLsdbTable
                       multicastLink (6),
                       nssaExternalLink (7),
                       areaOpaqueLink (10)
                       }
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The type of the link state advertisement.
          Each link state type has a separate advertisement
          format.

          Note: External link state advertisements are permitted
          for backward compatibility, but should be displayed
          in the ospfAsLsdbTable rather than here."
       REFERENCE
          "OSPF Version 2, Appendix A.4.1 The Link State
          Advertisement header"
       ::= { ospfLsdbEntry 2 }

  ospfLsdbLsid OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The Link State ID is an LS Type Specific field
          containing either a Router ID or an IP address;
          it identifies the piece of the routing domain
          that is being described by the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.4 Link State ID"
       ::= { ospfLsdbEntry 3 }

  ospfLsdbRouterId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current



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       DESCRIPTION
          "The 32-bit number that uniquely identifies the
          originating router in the Autonomous System."
       REFERENCE
          "OSPF Version 2, Appendix C.1 Global parameters"
       ::= { ospfLsdbEntry 4 }

  ospfLsdbSequence OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The sequence number field is a signed 32-bit
          integer.  It starts with the value '80000001'h,
          or -'7FFFFFFF'h, and increments until '7FFFFFFF'h.
          Thus, a typical sequence number will be very negative.
          It is used to detect old and duplicate Link State
          Advertisements.  The space of sequence numbers is linearly
          ordered.  The larger the sequence number, the more recent
          the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.6 LS sequence
          number"
       ::= { ospfLsdbEntry 5 }

  ospfLsdbAge OBJECT-TYPE
       SYNTAX       Integer32 -- Should be 0..MaxAge, except when
                              -- doNotAge bit is set
       UNITS        "seconds"
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "This field is the age of the link state advertisement
          in seconds."
       REFERENCE
          "OSPF Version 2, Section 12.1.1 LS age"
       ::= { ospfLsdbEntry 6 }

  ospfLsdbChecksum OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "This field is the checksum of the complete contents of
          the advertisement, excepting the age field.  The age field
          is excepted so that an advertisement's age can be
          incremented without updating the checksum.  The checksum
          used is the same that is used for ISO connectionless



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          datagrams; it is commonly referred to as the
          Fletcher checksum."
        REFERENCE
           "OSPF Version 2, Section 12.1.7 LS checksum"
        ::= { ospfLsdbEntry 7 }

  ospfLsdbAdvertisement OBJECT-TYPE
       SYNTAX       OCTET STRING (SIZE (1..65535))
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The entire link state advertisement, including
          its header.

          Note that for variable length LSAs, SNMP agents
          may not be able to return the largest string size."
       REFERENCE
          "OSPF Version 2, Section 12 Link State Advertisements"
       ::= { ospfLsdbEntry 8 }

--  Address Range Table

  ospfAreaRangeTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfAreaRangeEntry
       MAX-ACCESS   not-accessible
       STATUS       obsolete
       DESCRIPTION
          "The Address Range Table acts as an adjunct to the Area
           Table.  It describes those Address Range Summaries that
           are configured to be propagated from an Area to reduce
           the amount of information about it that is known beyond
           its borders.  It contains a set of IP address ranges
           specified by an IP address/IP network mask pair.
           For example, class B address range of X.X.X.X
           with a network mask of 255.255.0.0 includes all IP
           addresses from X.X.0.0 to X.X.255.255.

           Note that this table is obsoleted and is replaced
           by the Area Aggregate Table."
       REFERENCE
          "OSPF Version 2, Appendix C.2  Area parameters"
       ::= { ospf 5 }

  ospfAreaRangeEntry OBJECT-TYPE
       SYNTAX       OspfAreaRangeEntry
       MAX-ACCESS   not-accessible
       STATUS       obsolete
       DESCRIPTION



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          "A single area address range.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile
          storage."
       REFERENCE
          "OSPF Version 2, Appendix C.2  Area parameters"
       INDEX { ospfAreaRangeAreaId, ospfAreaRangeNet }
       ::= { ospfAreaRangeTable 1 }

  OspfAreaRangeEntry ::=
       SEQUENCE {
          ospfAreaRangeAreaId
             AreaID,
          ospfAreaRangeNet
             IpAddress,
          ospfAreaRangeMask
             IpAddress,
          ospfAreaRangeStatus
             RowStatus,
          ospfAreaRangeEffect
             INTEGER
          }

  ospfAreaRangeAreaId OBJECT-TYPE
       SYNTAX       AreaID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       obsolete
       DESCRIPTION
          "The area that the address range is to be found
          within."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
       ::= { ospfAreaRangeEntry 1 }

  ospfAreaRangeNet OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       obsolete
       DESCRIPTION
          "The IP address of the net or subnet indicated
          by the range."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
       ::= { ospfAreaRangeEntry 2 }




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  ospfAreaRangeMask OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-create
       STATUS       obsolete
       DESCRIPTION
          "The subnet mask that pertains to the net or
          subnet."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
       ::= { ospfAreaRangeEntry 3 }

  ospfAreaRangeStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       obsolete
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
       ::= { ospfAreaRangeEntry 4 }

  ospfAreaRangeEffect OBJECT-TYPE
       SYNTAX       INTEGER {
                       advertiseMatching (1),
                       doNotAdvertiseMatching (2)
                       }
       MAX-ACCESS   read-create
       STATUS       obsolete
       DESCRIPTION
          "Subnets subsumed by ranges either trigger the
          advertisement of the indicated summary
         (advertiseMatching) or result in the subnet's not
          being advertised at all outside the area."
       DEFVAL { advertiseMatching }
       ::= { ospfAreaRangeEntry 5 }

--  OSPF Host Table

  ospfHostTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfHostEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The Host/Metric Table indicates what hosts are directly



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          attached to the router, what metrics and types
          of service should be advertised for them,
          and what areas they are found within."
       REFERENCE
          "OSPF Version 2, Appendix C.7 Host route
          parameters"
       ::= { ospf 6 }

  ospfHostEntry OBJECT-TYPE
       SYNTAX       OspfHostEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A metric to be advertised, for a given type of
          service, when a given host is reachable.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile
          storage."
       INDEX { ospfHostIpAddress, ospfHostTOS }
       ::= { ospfHostTable 1 }

  OspfHostEntry ::=
       SEQUENCE {
          ospfHostIpAddress
             IpAddress,
          ospfHostTOS
             TOSType,
          ospfHostMetric
             Metric,
          ospfHostStatus
             RowStatus,
          ospfHostAreaID
             AreaID,
          ospfHostCfgAreaID
             AreaID
          }

  ospfHostIpAddress OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The IP address of the host."
       REFERENCE
          "OSPF Version 2, Appendix C.7 Host route parameters"
       ::= { ospfHostEntry 1 }



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  ospfHostTOS OBJECT-TYPE
       SYNTAX       TOSType
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The Type of Service of the route being configured."
       REFERENCE
          "OSPF Version 2, Appendix C.7 Host route parameters"
       ::= { ospfHostEntry 2 }

  ospfHostMetric OBJECT-TYPE
       SYNTAX       Metric
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The metric to be advertised."
       REFERENCE
          "OSPF Version 2, Appendix C.7 Host route parameters"
       ::= { ospfHostEntry 3 }

  ospfHostStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
       ::= { ospfHostEntry 4 }

  ospfHostAreaID OBJECT-TYPE
       SYNTAX       AreaID
       MAX-ACCESS   read-only
       STATUS       deprecated
       DESCRIPTION
          "The OSPF area to which the host belongs.
          Deprecated by ospfHostCfgAreaID."
       REFERENCE
          "OSPF Version 2, Appendix C.7 Host parameters"
       ::= { ospfHostEntry 5 }

  ospfHostCfgAreaID OBJECT-TYPE
       SYNTAX       AreaID



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       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "To configure the OSPF area to which the host belongs."
       REFERENCE
          "OSPF Version 2, Appendix C.7 Host parameters"
       ::= { ospfHostEntry 6 }

--  OSPF Interface Table

  ospfIfTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfIfEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The OSPF Interface Table describes the interfaces
          from the viewpoint of OSPF.
          It augments the ipAddrTable with OSPF specific information."
       REFERENCE
          "OSPF Version 2, Appendix C.3  Router interface
          parameters"
       ::= { ospf 7 }

  ospfIfEntry OBJECT-TYPE
       SYNTAX       OspfIfEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The OSPF interface entry describes one interface
          from the viewpoint of OSPF.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile
          storage."
       INDEX { ospfIfIpAddress, ospfAddressLessIf }
       ::= { ospfIfTable 1 }

  OspfIfEntry ::=
       SEQUENCE {
          ospfIfIpAddress
             IpAddress,
          ospfAddressLessIf
             InterfaceIndexOrZero,
          ospfIfAreaId
             AreaID,
          ospfIfType
             INTEGER,
          ospfIfAdminStat



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             Status,
          ospfIfRtrPriority
             DesignatedRouterPriority,
          ospfIfTransitDelay
             UpToMaxAge,
          ospfIfRetransInterval
             UpToMaxAge,
          ospfIfHelloInterval
             HelloRange,
          ospfIfRtrDeadInterval
             PositiveInteger,
          ospfIfPollInterval
             PositiveInteger,
          ospfIfState
             INTEGER,
          ospfIfDesignatedRouter
             IpAddress,
          ospfIfBackupDesignatedRouter
             IpAddress,
          ospfIfEvents
             Counter32,
          ospfIfAuthKey
             OCTET STRING,
          ospfIfStatus
             RowStatus,
          ospfIfMulticastForwarding
             INTEGER,
          ospfIfDemand
             TruthValue,
          ospfIfAuthType
             OspfAuthenticationType,
          ospfIfLsaCount
             Gauge32,
          ospfIfLsaCksumSum
             Unsigned32,
          ospfIfDesignatedRouterId
             RouterID,
          ospfIfBackupDesignatedRouterId
             RouterID
          }

  ospfIfIpAddress OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The IP address of this OSPF interface."



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       ::= { ospfIfEntry 1 }

  ospfAddressLessIf OBJECT-TYPE
       SYNTAX       InterfaceIndexOrZero
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "For the purpose of easing the instancing of
          addressed and addressless interfaces; this
          variable takes the value 0 on interfaces with
          IP addresses and the corresponding value of
          ifIndex for interfaces having no IP address."
       ::= { ospfIfEntry 2 }

  ospfIfAreaId OBJECT-TYPE
       SYNTAX       AreaID
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "A 32-bit integer uniquely identifying the area
          to which the interface connects.  Area ID
          0.0.0.0 is used for the OSPF backbone."
       DEFVAL { '00000000'H }  -- 0.0.0.0
       ::= { ospfIfEntry 3 }

  ospfIfType OBJECT-TYPE
       SYNTAX       INTEGER {
                       broadcast (1),
                       nbma (2),
                       pointToPoint (3),
                       pointToMultipoint (5)
                       }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The OSPF interface type.
          By way of a default, this field may be intuited
          from the corresponding value of ifType.
          Broadcast LANs, such as Ethernet and IEEE 802.5,
          take the value 'broadcast', X.25 and similar
          technologies take the value 'nbma', and links
          that are definitively point to point take the
          value 'pointToPoint'."
        ::= { ospfIfEntry 4 }

  ospfIfAdminStat OBJECT-TYPE
       SYNTAX       Status



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       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The OSPF interface's administrative status.
          The value formed on the interface, and the interface
          will be advertised as an internal route to some area.
          The value 'disabled' denotes that the interface is
          external to OSPF."
       DEFVAL { enabled }
       ::= { ospfIfEntry 5 }

  ospfIfRtrPriority OBJECT-TYPE
       SYNTAX       DesignatedRouterPriority
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The priority of this interface.  Used in
          multi-access networks, this field is used in
          the designated router election algorithm.  The
          value 0 signifies that the router is not eligible
          to become the designated router on this particular
          network.  In the event of a tie in this value,
          routers will use their Router ID as a tie breaker."
        DEFVAL { 1 }
        ::= { ospfIfEntry 6 }

  ospfIfTransitDelay OBJECT-TYPE
        SYNTAX       UpToMaxAge
        UNITS        "seconds"
        MAX-ACCESS   read-create
        STATUS       current
        DESCRIPTION
           "The estimated number of seconds it takes to
           transmit a link state update packet over this
           interface.  Note that the minimal value SHOULD be
           1 second."
        DEFVAL { 1 }
        ::= { ospfIfEntry 7 }

  ospfIfRetransInterval OBJECT-TYPE
       SYNTAX       UpToMaxAge
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The number of seconds between link state advertisement
          retransmissions, for adjacencies belonging to this
          interface.  This value is also used when retransmitting



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          database description and Link State request packets.
          Note that minimal value SHOULD be 1 second."
       DEFVAL { 5 }
       ::= { ospfIfEntry 8 }

  ospfIfHelloInterval OBJECT-TYPE
       SYNTAX       HelloRange
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The length of time, in seconds, between the Hello packets
          that the router sends on the interface.  This value must be
          the same for all routers attached to a common network."
       DEFVAL { 10 }
       ::= { ospfIfEntry 9 }

  ospfIfRtrDeadInterval OBJECT-TYPE
       SYNTAX       PositiveInteger
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The number of seconds that a router's Hello packets have
          not been seen before its neighbors declare the router down.
          This should be some multiple of the Hello interval.  This
          value must be the same for all routers attached to a common
          network."
        DEFVAL { 40 }
        ::= { ospfIfEntry 10 }

  ospfIfPollInterval OBJECT-TYPE
       SYNTAX       PositiveInteger
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The larger time interval, in seconds, between the Hello
          packets sent to an inactive non-broadcast multi-access
          neighbor."
       DEFVAL { 120 }
       ::= { ospfIfEntry 11 }

  ospfIfState OBJECT-TYPE
       SYNTAX       INTEGER {
                       down (1),
                       loopback (2),
                       waiting (3),



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                       pointToPoint (4),
                       designatedRouter (5),
                       backupDesignatedRouter (6),
                       otherDesignatedRouter (7)
                       }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The OSPF Interface State."
       DEFVAL { down }
       ::= { ospfIfEntry 12 }

  ospfIfDesignatedRouter OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The IP address of the designated router."
       DEFVAL { '00000000'H } -- 0.0.0.0
       ::= { ospfIfEntry 13 }

  ospfIfBackupDesignatedRouter OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The IP address of the backup designated
          router."
       DEFVAL { '00000000'H }  -- 0.0.0.0
       ::= { ospfIfEntry 14 }

  ospfIfEvents OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The number of times this OSPF interface has
          changed its state or an error has occurred.

          Discontinuities in the value of this counter can occur
          at re-initialization of the management system, and at other
          times as indicated by the value of ospfDiscontinuityTime."
       ::= { ospfIfEntry 15 }

  ospfIfAuthKey OBJECT-TYPE
       SYNTAX       OCTET STRING (SIZE (0..256))
       MAX-ACCESS   read-create
       STATUS       current



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       DESCRIPTION
          "The cleartext password used as an OSPF
          authentication key when simplePassword security
          is enabled.  This object does not access any OSPF
          cryptogaphic (e.g., MD5) authentication key under
          any circumstance.

          If the key length is shorter than 8 octets, the
          agent will left adjust and zero fill to 8 octets.

          Unauthenticated interfaces need no authentication
          key, and simple password authentication cannot use
          a key of more than 8 octets.

          Note that the use of simplePassword authentication
          is NOT recommended when there is concern regarding
          attack upon the OSPF system.  SimplePassword
          authentication is only sufficient to protect against
          accidental misconfigurations because it re-uses
          cleartext passwords [RFC1704].

          When read, ospfIfAuthKey always returns an octet
          string of length zero."
       REFERENCE
          "OSPF Version 2, Section 9 The Interface Data
          Structure"
       DEFVAL { '0000000000000000'H } -- 0.0.0.0.0.0.0.0
       ::= { ospfIfEntry 16 }

  ospfIfStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
       ::= { ospfIfEntry 17 }

  ospfIfMulticastForwarding OBJECT-TYPE
       SYNTAX       INTEGER {
                       blocked (1), -- no multicast forwarding
                       multicast (2), -- using multicast address
                       unicast (3) -- to each OSPF neighbor



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                       }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The way multicasts should be forwarded on this
          interface: not forwarded, forwarded as data
          link multicasts, or forwarded as data link
          unicasts.  Data link multicasting is not
          meaningful on point-to-point and NBMA interfaces,
          and setting ospfMulticastForwarding to 0 effectively
          disables all multicast forwarding."
       DEFVAL { blocked }
       ::= { ospfIfEntry 18 }

  ospfIfDemand OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "Indicates whether Demand OSPF procedures (hello
          suppression to FULL neighbors and setting the
          DoNotAge flag on propagated LSAs) should be
          performed on this interface."
       DEFVAL { false }
       ::= { ospfIfEntry 19 }

  ospfIfAuthType OBJECT-TYPE
       SYNTAX       OspfAuthenticationType
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The authentication type specified for an interface.

          Note that this object can be used to engage
          in significant attacks against an OSPF router."
       REFERENCE
          "OSPF Version 2, Appendix D Authentication"
       DEFVAL { none } -- no authentication, by default
       ::= { ospfIfEntry 20 }

  ospfIfLsaCount OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The total number of link-local link state advertisements
          in this interface's link-local link state database."
       ::= { ospfIfEntry 21 }



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  ospfIfLsaCksumSum OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The 32-bit unsigned sum of the Link State
          Advertisements' LS checksums contained in this
          interface's link-local link state database.
          The sum can be used to determine if there has
          been a change in the interface's link state
          database and to compare the interface link state
          database of routers attached to the same subnet."
       ::= { ospfIfEntry 22 }

  ospfIfDesignatedRouterId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The Router ID of the designated router."
       ::= { ospfIfEntry 23 }

  ospfIfBackupDesignatedRouterId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The Router ID of the backup designated router."
       ::= { ospfIfEntry 24 }

--  OSPF Interface Metric Table

  ospfIfMetricTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfIfMetricEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The Metric Table describes the metrics to be advertised
          for a specified interface at the various types of service.
          As such, this table is an adjunct of the OSPF Interface
          Table.

          Types of service, as defined by RFC 791, have the ability
          to request low delay, high bandwidth, or reliable linkage.

          For the purposes of this specification, the measure of
          bandwidth:




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          Metric = referenceBandwidth / ifSpeed

          is the default value.
          The default reference bandwidth is 10^8.
          For multiple link interfaces, note that ifSpeed is the sum
          of the individual link speeds.  This yields a number having
          the following typical values:

          Network Type/bit rate   Metric

          >= 100 MBPS                 1
          Ethernet/802.3             10
          E1                         48
          T1 (ESF)                   65
          64 KBPS                    1562
          56 KBPS                    1785
          19.2 KBPS                  5208
          9.6 KBPS                   10416

          Routes that are not specified use the default
          (TOS 0) metric.

          Note that the default reference bandwidth can be configured
          using the general group object ospfReferenceBandwidth."
       REFERENCE
          "OSPF Version 2, Appendix C.3 Router interface
          parameters"
       ::= { ospf 8 }

  ospfIfMetricEntry OBJECT-TYPE
       SYNTAX       OspfIfMetricEntry
       MAX-ACCESS   not-accessible
       STATUS      current
       DESCRIPTION
          "A particular TOS metric for a non-virtual interface
          identified by the interface index.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile
          storage."
       REFERENCE
          "OSPF Version 2, Appendix C.3 Router interface
          parameters"
       INDEX { ospfIfMetricIpAddress,
          ospfIfMetricAddressLessIf,
          ospfIfMetricTOS }
       ::= { ospfIfMetricTable 1 }




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  OspfIfMetricEntry ::=
       SEQUENCE {
          ospfIfMetricIpAddress
             IpAddress,
          ospfIfMetricAddressLessIf
             InterfaceIndexOrZero,
          ospfIfMetricTOS
             TOSType,
          ospfIfMetricValue
             Metric,
          ospfIfMetricStatus
             RowStatus
          }

  ospfIfMetricIpAddress OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The IP address of this OSPF interface.  On row
          creation, this can be derived from the instance."
       ::= { ospfIfMetricEntry 1 }

  ospfIfMetricAddressLessIf OBJECT-TYPE
       SYNTAX       InterfaceIndexOrZero
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "For the purpose of easing the instancing of
          addressed and addressless interfaces; this
          variable takes the value 0 on interfaces with
          IP addresses and the value of ifIndex for
          interfaces having no IP address.  On row
          creation, this can be derived from the instance."
        ::= { ospfIfMetricEntry 2 }

  ospfIfMetricTOS OBJECT-TYPE
       SYNTAX       TOSType
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The Type of Service metric being referenced.
          On row creation, this can be derived from the
          instance."
       ::= { ospfIfMetricEntry 3 }



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  ospfIfMetricValue OBJECT-TYPE
       SYNTAX       Metric
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The metric of using this Type of Service on
          this interface.  The default value of the TOS 0
          metric is 10^8 / ifSpeed."
       ::= { ospfIfMetricEntry 4 }

  ospfIfMetricStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
       ::= { ospfIfMetricEntry 5 }

--  OSPF Virtual Interface Table

  ospfVirtIfTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfVirtIfEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "Information about this router's virtual interfaces
          that the OSPF Process is configured to carry on."
       REFERENCE
          "OSPF Version 2, Appendix C.4  Virtual link
          parameters"
       ::= { ospf 9 }

  ospfVirtIfEntry OBJECT-TYPE
       SYNTAX       OspfVirtIfEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "Information about a single virtual interface.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile
          storage."



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       INDEX { ospfVirtIfAreaId, ospfVirtIfNeighbor }
       ::= { ospfVirtIfTable 1 }

  OspfVirtIfEntry ::=
       SEQUENCE {
          ospfVirtIfAreaId
             AreaID,
          ospfVirtIfNeighbor
             RouterID,
          ospfVirtIfTransitDelay
             UpToMaxAge,
          ospfVirtIfRetransInterval
             UpToMaxAge,
          ospfVirtIfHelloInterval
             HelloRange,
          ospfVirtIfRtrDeadInterval
             PositiveInteger,
          ospfVirtIfState
             INTEGER,
          ospfVirtIfEvents
             Counter32,
          ospfVirtIfAuthKey
             OCTET STRING,
          ospfVirtIfStatus
             RowStatus,
          ospfVirtIfAuthType
             OspfAuthenticationType,
          ospfVirtIfLsaCount
             Gauge32,
          ospfVirtIfLsaCksumSum
             Unsigned32
          }

  ospfVirtIfAreaId OBJECT-TYPE
       SYNTAX       AreaID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The transit area that the virtual link
          traverses.  By definition, this is not 0.0.0.0."
       ::= { ospfVirtIfEntry 1 }

  ospfVirtIfNeighbor OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current



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       DESCRIPTION
          "The Router ID of the virtual neighbor."
       ::= { ospfVirtIfEntry 2 }

  ospfVirtIfTransitDelay OBJECT-TYPE
       SYNTAX       UpToMaxAge
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The estimated number of seconds it takes to
          transmit a Link State update packet over this
          interface.  Note that the minimal value SHOULD be
          1 second."
       DEFVAL { 1 }
       ::= { ospfVirtIfEntry 3 }

  ospfVirtIfRetransInterval OBJECT-TYPE
       SYNTAX       UpToMaxAge
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The number of seconds between link state
          avertisement retransmissions, for adjacencies
          belonging to this interface.  This value is
          also used when retransmitting database
          description and Link State request packets.  This
          value should be well over the expected
          round-trip time.  Note that the minimal value SHOULD be
          1 second."
       DEFVAL { 5 }
       ::= { ospfVirtIfEntry 4 }

  ospfVirtIfHelloInterval OBJECT-TYPE
       SYNTAX       HelloRange
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The length of time, in seconds, between the
          Hello packets that the router sends on the
          interface.  This value must be the same for the
          virtual neighbor."
       DEFVAL { 10 }
       ::= { ospfVirtIfEntry 5 }

  ospfVirtIfRtrDeadInterval OBJECT-TYPE



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       SYNTAX       PositiveInteger
       UNITS        "seconds"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The number of seconds that a router's Hello
          packets have not been seen before its
          neighbors declare the router down.  This should be
          some multiple of the Hello interval.  This
          value must be the same for the virtual neighbor."
       DEFVAL { 60 }
       ::= { ospfVirtIfEntry 6 }

  ospfVirtIfState OBJECT-TYPE
       SYNTAX       INTEGER {
                       down (1), -- these use the same encoding
                       pointToPoint (4) -- as the ospfIfTable
                       }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "OSPF virtual interface states."
       DEFVAL { down }
       ::= { ospfVirtIfEntry 7 }

  ospfVirtIfEvents OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The number of state changes or error events on
          this virtual link.

          Discontinuities in the value of this counter can occur
          at re-initialization of the management system, and at other
          times as indicated by the value of ospfDiscontinuityTime."
       ::= { ospfVirtIfEntry 8 }

  ospfVirtIfAuthKey OBJECT-TYPE
       SYNTAX       OCTET STRING (SIZE(0..256))
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The cleartext password used as an OSPF
          authentication key when simplePassword security
          is enabled.  This object does not access any OSPF
          cryptogaphic (e.g., MD5) authentication key under
          any circumstance.



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          If the key length is shorter than 8 octets, the
          agent will left adjust and zero fill to 8 octets.

          Unauthenticated interfaces need no authentication
          key, and simple password authentication cannot use
          a key of more than 8 octets.

          Note that the use of simplePassword authentication
          is NOT recommended when there is concern regarding
          attack upon the OSPF system.  SimplePassword
          authentication is only sufficient to protect against
          accidental misconfigurations because it re-uses
          cleartext passwords.  [RFC1704]

          When read, ospfIfAuthKey always returns an octet
          string of length zero."
       REFERENCE
          "OSPF Version 2, Section 9 The Interface Data
          Structure"
       DEFVAL { '0000000000000000'H } -- 0.0.0.0.0.0.0.0
       ::= { ospfVirtIfEntry 9 }

  ospfVirtIfStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
        ::= { ospfVirtIfEntry 10 }

  ospfVirtIfAuthType OBJECT-TYPE
       SYNTAX       OspfAuthenticationType
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The authentication type specified for a virtual interface.

          Note that this object can be used to engage
          in significant attacks against an OSPF router."
       REFERENCE
          "OSPF Version 2, Appendix E Authentication"
       DEFVAL { none } -- no authentication, by default



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       ::= { ospfVirtIfEntry 11 }

  ospfVirtIfLsaCount OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The total number of link-local link state advertisements
          in this virtual interface's link-local link state database."
       ::= { ospfVirtIfEntry 12 }

  ospfVirtIfLsaCksumSum OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The 32-bit unsigned sum of the link state
          advertisements' LS checksums contained in this
          virtual interface's link-local link state database.
          The sum can be used to determine if there has
          been a change in the virtual interface's link state
          database, and to compare the virtual interface
          link state database of the virtual neighbors."
       ::= { ospfVirtIfEntry 13 }

--  OSPF Neighbor Table

  ospfNbrTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfNbrEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A table describing all non-virtual neighbors
          in the locality of the OSPF router."
       REFERENCE
          "OSPF Version 2, Section 10 The Neighbor Data
          Structure"
       ::= { ospf 10 }

  ospfNbrEntry OBJECT-TYPE
       SYNTAX       OspfNbrEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The information regarding a single neighbor.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile



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          storage."
       REFERENCE
          "OSPF Version 2, Section 10 The Neighbor Data
          Structure"
       INDEX { ospfNbrIpAddr, ospfNbrAddressLessIndex }
       ::= { ospfNbrTable 1 }

  OspfNbrEntry ::=
       SEQUENCE {
          ospfNbrIpAddr
             IpAddress,
          ospfNbrAddressLessIndex
             InterfaceIndexOrZero,
          ospfNbrRtrId
             RouterID,
          ospfNbrOptions
             Integer32,
          ospfNbrPriority
             DesignatedRouterPriority,
          ospfNbrState
             INTEGER,
          ospfNbrEvents
             Counter32,
          ospfNbrLsRetransQLen
             Gauge32,
          ospfNbmaNbrStatus
             RowStatus,
          ospfNbmaNbrPermanence
             INTEGER,
          ospfNbrHelloSuppressed
             TruthValue,
          ospfNbrRestartHelperStatus
             INTEGER,
          ospfNbrRestartHelperAge
             Unsigned32,
          ospfNbrRestartHelperExitReason
             INTEGER
          }

  ospfNbrIpAddr OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The IP address this neighbor is using in its
          IP source address.  Note that, on addressless
          links, this will not be 0.0.0.0 but the



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          address of another of the neighbor's interfaces."
       ::= { ospfNbrEntry 1 }

   ospfNbrAddressLessIndex OBJECT-TYPE
       SYNTAX       InterfaceIndexOrZero
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "On an interface having an IP address, zero.
          On addressless interfaces, the corresponding
          value of ifIndex in the Internet Standard MIB.
          On row creation, this can be derived from the
          instance."
        ::= { ospfNbrEntry 2 }

  ospfNbrRtrId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "A 32-bit integer (represented as a type
          IpAddress) uniquely identifying the neighboring
          router in the Autonomous System."
       DEFVAL { '00000000'H } -- 0.0.0.0
       ::= { ospfNbrEntry 3 }

  ospfNbrOptions OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "A bit mask corresponding to the neighbor's
          options field.

          Bit 0, if set, indicates that the system will
          operate on Type of Service metrics other than
          TOS 0.  If zero, the neighbor will ignore all
          metrics except the TOS 0 metric.

          Bit 1, if set, indicates that the associated
          area accepts and operates on external
          information; if zero, it is a stub area.

          Bit 2, if set, indicates that the system is
          capable of routing IP multicast datagrams, that is
          that it implements the multicast extensions to
          OSPF.



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          Bit 3, if set, indicates that the associated
          area is an NSSA.  These areas are capable of
          carrying type-7 external advertisements, which
          are translated into type-5 external advertisements
          at NSSA borders."
       REFERENCE
           "OSPF Version 2, Section 12.1.2 Options"
       DEFVAL { 0 }
       ::= { ospfNbrEntry 4 }

   ospfNbrPriority OBJECT-TYPE
       SYNTAX       DesignatedRouterPriority
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "The priority of this neighbor in the designated
          router election algorithm.  The value 0 signifies
          that the neighbor is not eligible to become
          the designated router on this particular network."

       DEFVAL { 1 }
       ::= { ospfNbrEntry 5 }

   ospfNbrState OBJECT-TYPE
        SYNTAX       INTEGER {
                         down (1),
                         attempt (2),
                         init (3),
                         twoWay (4),
                         exchangeStart (5),
                         exchange (6),
                         loading (7),
                         full (8)
                         }
         MAX-ACCESS   read-only
         STATUS       current
         DESCRIPTION
            "The state of the relationship with this neighbor."
         REFERENCE
            "OSPF Version 2, Section 10.1 Neighbor States"
         DEFVAL { down }
         ::= { ospfNbrEntry 6 }

  ospfNbrEvents OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION



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          "The number of times this neighbor relationship
          has changed state or an error has occurred.

          Discontinuities in the value of this counter can occur
          at re-initialization of the management system, and at other
          times as indicated by the value of ospfDiscontinuityTime."
       ::= { ospfNbrEntry 7 }

  ospfNbrLsRetransQLen OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The current length of the retransmission
          queue."
       ::= { ospfNbrEntry 8 }

  ospfNbmaNbrStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
       ::= { ospfNbrEntry 9 }

  ospfNbmaNbrPermanence OBJECT-TYPE
       SYNTAX       INTEGER {
                       dynamic (1), -- learned through protocol
                       permanent (2) -- configured address
                       }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "This variable displays the status of the entry;
          'dynamic' and 'permanent' refer to how the neighbor
          became known."
       DEFVAL { permanent }
       ::= { ospfNbrEntry 10 }

   ospfNbrHelloSuppressed OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-only



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       STATUS       current
       DESCRIPTION
          "Indicates whether Hellos are being suppressed
          to the neighbor."
       ::= { ospfNbrEntry 11 }

  ospfNbrRestartHelperStatus OBJECT-TYPE
       SYNTAX       INTEGER { notHelping (1),
                              helping (2)
                            }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Indicates whether the router is acting
          as a graceful restart helper for the neighbor."
          ::= { ospfNbrEntry 12 }

  ospfNbrRestartHelperAge OBJECT-TYPE
       SYNTAX       Unsigned32
       UNITS        "seconds"
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Remaining time in current OSPF graceful restart
          interval, if the router is acting as a restart
          helper for the neighbor."
       ::= { ospfNbrEntry 13 }

  ospfNbrRestartHelperExitReason OBJECT-TYPE
       SYNTAX       INTEGER { none (1),           -- not attempted
                              inProgress (2),     -- restart in
                                                  -- progress
                              completed (3),      -- successfully
                                                  -- completed
                              timedOut (4),       -- timed out
                              topologyChanged (5) -- aborted due to
                                                  -- topology
                                                  -- change.
                            }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Describes the outcome of the last attempt at acting
           as a graceful restart helper for the neighbor."
       ::= { ospfNbrEntry 14 }

--  OSPF Virtual Neighbor Table




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  ospfVirtNbrTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfVirtNbrEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "This table describes all virtual neighbors.
          Since virtual links are configured
          in the Virtual Interface Table, this table is read-only."
       REFERENCE
          "OSPF Version 2, Section 15 Virtual Links"
       ::= { ospf 11 }

  ospfVirtNbrEntry OBJECT-TYPE
       SYNTAX       OspfVirtNbrEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "Virtual neighbor information."
       INDEX { ospfVirtNbrArea, ospfVirtNbrRtrId }
       ::= { ospfVirtNbrTable 1 }

  OspfVirtNbrEntry ::=
       SEQUENCE {
          ospfVirtNbrArea
             AreaID,
          ospfVirtNbrRtrId
             RouterID,
          ospfVirtNbrIpAddr
             IpAddress,
          ospfVirtNbrOptions
             Integer32,
          ospfVirtNbrState
             INTEGER,
          ospfVirtNbrEvents
             Counter32,
          ospfVirtNbrLsRetransQLen
             Gauge32,
          ospfVirtNbrHelloSuppressed
             TruthValue,
          ospfVirtNbrRestartHelperStatus
             INTEGER,
          ospfVirtNbrRestartHelperAge
             Unsigned32,
          ospfVirtNbrRestartHelperExitReason
             INTEGER
          }

  ospfVirtNbrArea OBJECT-TYPE



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       SYNTAX       AreaID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The Transit Area Identifier."
       ::= { ospfVirtNbrEntry 1 }

  ospfVirtNbrRtrId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS      current
       DESCRIPTION
          "A 32-bit integer uniquely identifying the
          neighboring router in the Autonomous System."
       ::= { ospfVirtNbrEntry 2 }

  ospfVirtNbrIpAddr OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The IP address this virtual neighbor is using."
       ::= { ospfVirtNbrEntry 3 }

  ospfVirtNbrOptions OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "A bit mask corresponding to the neighbor's
          options field.

          Bit 1, if set, indicates that the system will
          operate on Type of Service metrics other than
          TOS 0.  If zero, the neighbor will ignore all
          metrics except the TOS 0 metric.

          Bit 2, if set, indicates that the system is
          network multicast capable, i.e., that it
          implements OSPF multicast routing."
       ::= { ospfVirtNbrEntry 4 }

   ospfVirtNbrState OBJECT-TYPE
       SYNTAX       INTEGER {
                       down (1),
                       attempt (2),



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                       init (3),
                       twoWay (4),
                       exchangeStart (5),
                       exchange (6),
                       loading (7),
                       full (8)
                       }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The state of the virtual neighbor relationship."
       ::= { ospfVirtNbrEntry 5 }

  ospfVirtNbrEvents OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The number of times this virtual link has
          changed its state or an error has occurred.

          Discontinuities in the value of this counter can occur
          at re-initialization of the management system, and at other
          times as indicated by the value of ospfDiscontinuityTime."
       ::= { ospfVirtNbrEntry 6 }

  ospfVirtNbrLsRetransQLen OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The current length of the retransmission
          queue."
       ::= { ospfVirtNbrEntry 7 }

  ospfVirtNbrHelloSuppressed OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Indicates whether Hellos are being suppressed
          to the neighbor."
       ::= { ospfVirtNbrEntry 8 }

  ospfVirtNbrRestartHelperStatus OBJECT-TYPE
       SYNTAX       INTEGER { notHelping (1),
                              helping (2)
                            }



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       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Indicates whether the router is acting
          as a graceful restart helper for the neighbor."
       ::= { ospfVirtNbrEntry 9 }

  ospfVirtNbrRestartHelperAge OBJECT-TYPE
       SYNTAX       Unsigned32
       UNITS        "seconds"
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Remaining time in current OSPF graceful restart
          interval, if the router is acting as a restart
          helper for the neighbor."
       ::= { ospfVirtNbrEntry 10 }

  ospfVirtNbrRestartHelperExitReason OBJECT-TYPE
       SYNTAX       INTEGER { none (1),           -- not attempted
                              inProgress (2),     -- restart in
                                                  -- progress
                              completed (3),      -- successfully
                                                  -- completed
                              timedOut (4),       -- timed out
                              topologyChanged (5) -- aborted due to
                                                  -- topology
                                                  -- change.
                            }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "Describes the outcome of the last attempt at acting
           as a graceful restart helper for the neighbor."
       ::= { ospfVirtNbrEntry 11 }

--  OSPF Link State Database, External

  ospfExtLsdbTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfExtLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS       deprecated
       DESCRIPTION
          "The OSPF Process's external LSA link state database.

          This table is identical to the OSPF LSDB Table
          in format, but contains only external link state
          advertisements.  The purpose is to allow external



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          LSAs to be displayed once for the router rather
          than once in each non-stub area.

          Note that external LSAs are also in the AS-scope link state
          database."
       REFERENCE
          "OSPF Version 2, Section 12 Link State Advertisements"
       ::= { ospf 12 }

  ospfExtLsdbEntry OBJECT-TYPE
       SYNTAX       OspfExtLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS       deprecated
       DESCRIPTION
          "A single link state advertisement."
       INDEX { ospfExtLsdbType, ospfExtLsdbLsid, ospfExtLsdbRouterId }
       ::= { ospfExtLsdbTable 1 }

  OspfExtLsdbEntry ::=
       SEQUENCE {
          ospfExtLsdbType
             INTEGER,
          ospfExtLsdbLsid
             IpAddress,
          ospfExtLsdbRouterId
             RouterID,
          ospfExtLsdbSequence
             Integer32,
          ospfExtLsdbAge
             Integer32,
          ospfExtLsdbChecksum
             Integer32,
          ospfExtLsdbAdvertisement
             OCTET STRING
          }

  ospfExtLsdbType OBJECT-TYPE
       SYNTAX      INTEGER {
                      asExternalLink (5)
                      }
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       deprecated
       DESCRIPTION
          "The type of the link state advertisement.
          Each link state type has a separate advertisement
          format."
       REFERENCE



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          "OSPF Version 2, Appendix A.4.1 The Link State
          Advertisement header"

       ::= { ospfExtLsdbEntry 1 }

  ospfExtLsdbLsid OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       deprecated
       DESCRIPTION
          "The Link State ID is an LS Type Specific field
          containing either a Router ID or an IP address;
          it identifies the piece of the routing domain
          that is being described by the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.4 Link State ID"
       ::= { ospfExtLsdbEntry 2 }

  ospfExtLsdbRouterId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       deprecated
       DESCRIPTION
          "The 32-bit number that uniquely identifies the
          originating router in the Autonomous System."
       REFERENCE
          "OSPF Version 2, Appendix C.1 Global parameters"
       ::= { ospfExtLsdbEntry 3 }

  ospfExtLsdbSequence OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       deprecated
       DESCRIPTION
          "The sequence number field is a signed 32-bit
          integer.  It starts with the value '80000001'h,
          or -'7FFFFFFF'h, and increments until '7FFFFFFF'h.
          Thus, a typical sequence number will be very negative.
          It is used to detect old and duplicate link state
          advertisements.  The space of sequence numbers is linearly
          ordered.  The larger the sequence number, the more recent
          the advertisement."
       REFERENCE
          "OSPF Version  2,  Section  12.1.6  LS  sequence
          number"
       ::= { ospfExtLsdbEntry 4 }



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  ospfExtLsdbAge OBJECT-TYPE
       SYNTAX       Integer32 -- Should be 0..MaxAge, except when
                              -- doNotAge bit is set
       UNITS        "seconds"
       MAX-ACCESS   read-only
       STATUS       deprecated
       DESCRIPTION
          "This field is the age of the link state
          advertisement in seconds."
       REFERENCE
          "OSPF Version 2, Section 12.1.1 LS age"
       ::= { ospfExtLsdbEntry 5 }

  ospfExtLsdbChecksum OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       deprecated
       DESCRIPTION
          "This field is the checksum of the complete
          contents of the advertisement, excepting the
          age field.  The age field is excepted so that
          an advertisement's age can be incremented
          without updating the checksum.  The checksum
          used is the same that is used for ISO
          connectionless datagrams; it is commonly referred
          to as the Fletcher checksum."
       REFERENCE
          "OSPF Version 2, Section 12.1.7 LS checksum"
       ::= { ospfExtLsdbEntry 6 }

  ospfExtLsdbAdvertisement OBJECT-TYPE
       SYNTAX       OCTET STRING (SIZE(36))
       MAX-ACCESS   read-only
       STATUS       deprecated
       DESCRIPTION
          "The entire link state advertisement, including
          its header."
       REFERENCE
          "OSPF Version 2, Section 12  Link State
          Advertisements"
       ::= { ospfExtLsdbEntry 7 }

--  OSPF Use of the CIDR Route Table

  ospfRouteGroup    OBJECT IDENTIFIER ::= { ospf 13 }

--     The IP Forwarding Table defines a number of objects for use by
--     the routing protocol to externalize its information.  Most of



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--     the variables (ipForwardDest, ipForwardMask, ipForwardPolicy,
--     ipForwardNextHop, ipForwardIfIndex, ipForwardType,
--     ipForwardProto, ipForwardAge, and ipForwardNextHopAS) are
--     defined there.

--     Those that leave some discretion are defined here.

--     ipCidrRouteProto is, of course, ospf (13).

--     ipCidrRouteAge is the time since the route was first
--     calculated, as opposed to the time since the last SPF run.
--     ipCidrRouteInfo is an OBJECT IDENTIFIER for use by the routing
--     protocol.  The following values shall be found there depending
--     on the way the route was calculated.

  ospfIntraArea      OBJECT IDENTIFIER ::= { ospfRouteGroup 1 }
  ospfInterArea      OBJECT IDENTIFIER ::= { ospfRouteGroup 2 }
  ospfExternalType1  OBJECT IDENTIFIER ::= { ospfRouteGroup 3 }
  ospfExternalType2  OBJECT IDENTIFIER ::= { ospfRouteGroup 4 }

--     ipCidrRouteMetric1 is, by definition, the primary routing
--     metric.  Therefore, it should be the metric that route
--     selection is based on.  For intra-area and inter-area routes,
--     it is an OSPF metric.  For External Type 1 (comparable value)
--     routes, it is an OSPF metric plus the External Metric.  For
--     external Type 2 (non-comparable value) routes, it is the
--     external metric.

--     ipCidrRouteMetric2 is, by definition, a secondary routing
--     metric.  Therefore, it should be the metric that breaks a tie
--     among routes having equal metric1 values and the same
--     calculation rule.  For intra-area, inter-area routes, and
--     External Type 1 (comparable value) routes, it is unused.  For
--     External Type 2 (non-comparable value) routes, it is the metric
--     to the AS border router.

--     ipCidrRouteMetric3, ipCidrRouteMetric4, and ipCidrRouteMetric5
--     are unused.

--  The OSPF Area Aggregate Table
--
--     This table replaces the OSPF Area Summary Table, being an
--     extension of that for CIDR routers.

   ospfAreaAggregateTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfAreaAggregateEntry
       MAX-ACCESS   not-accessible
       STATUS       current



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       DESCRIPTION
          "The Area Aggregate Table acts as an adjunct
           to the Area Table.  It describes those address aggregates
           that are configured to be propagated from an area.
           Its purpose is to reduce the amount of information
           that is known beyond an Area's borders.

           It contains a set of IP address ranges
           specified by an IP address/IP network mask pair.
           For example, a class B address range of X.X.X.X
           with a network mask of 255.255.0.0 includes all IP
           addresses from X.X.0.0 to X.X.255.255.

           Note that if ranges are configured such that one range
           subsumes another range (e.g., 10.0.0.0 mask 255.0.0.0
           and 10.1.0.0 mask 255.255.0.0),
           the most specific match is the preferred one."
       REFERENCE
          "OSPF Version 2, Appendix C.2  Area parameters"
       ::= { ospf 14 }

  ospfAreaAggregateEntry OBJECT-TYPE
       SYNTAX   OspfAreaAggregateEntry
       MAX-ACCESS   not-accessible
       STATUS   current
       DESCRIPTION
          "A single area aggregate entry.

          Information in this table is persistent and when this object
          is written the entity SHOULD save the change to non-volatile
          storage."
       REFERENCE
          "OSPF Version 2, Appendix C.2  Area parameters"
       INDEX { ospfAreaAggregateAreaID, ospfAreaAggregateLsdbType,
          ospfAreaAggregateNet, ospfAreaAggregateMask }
       ::= { ospfAreaAggregateTable 1 }

  OspfAreaAggregateEntry ::=
       SEQUENCE {
          ospfAreaAggregateAreaID
             AreaID,
          ospfAreaAggregateLsdbType
             INTEGER,
          ospfAreaAggregateNet
             IpAddress,
          ospfAreaAggregateMask
             IpAddress,
          ospfAreaAggregateStatus



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             RowStatus,
          ospfAreaAggregateEffect
             INTEGER,
          ospfAreaAggregateExtRouteTag
             Unsigned32
          }

  ospfAreaAggregateAreaID OBJECT-TYPE
       SYNTAX       AreaID
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The area within which the address aggregate is to be
          found."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
       ::= { ospfAreaAggregateEntry 1 }

  ospfAreaAggregateLsdbType OBJECT-TYPE
       SYNTAX       INTEGER {
                       summaryLink (3),
                       nssaExternalLink (7)
                       }
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS       current
       DESCRIPTION
          "The type of the address aggregate.  This field
          specifies the Lsdb type that this address
          aggregate applies to."
       REFERENCE
          "OSPF Version 2, Appendix A.4.1 The Link State
          Advertisement header"
       ::= { ospfAreaAggregateEntry 2 }

  ospfAreaAggregateNet OBJECT-TYPE
       SYNTAX   IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS   current
       DESCRIPTION
          "The IP address of the net or subnet indicated
          by the range."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
       ::= { ospfAreaAggregateEntry 3 }




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  ospfAreaAggregateMask OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   read-only -- read-only since originally an
                              -- SMIv1 index
       STATUS      current
       DESCRIPTION
          "The subnet mask that pertains to the net or
          subnet."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
       ::= { ospfAreaAggregateEntry 4 }

  ospfAreaAggregateStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "This object permits management of the table by
          facilitating actions such as row creation,
          construction, and destruction.

          The value of this object has no effect on
          whether other objects in this conceptual row can be
          modified."
       ::= { ospfAreaAggregateEntry 5 }

  ospfAreaAggregateEffect OBJECT-TYPE
       SYNTAX       INTEGER {
                       advertiseMatching (1),
                       doNotAdvertiseMatching (2)
                       }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "Subnets subsumed by ranges either trigger the
          advertisement of the indicated aggregate
         (advertiseMatching) or result in the subnet's not
          being advertised at all outside the area."
       DEFVAL { advertiseMatching }
       ::= { ospfAreaAggregateEntry 6 }

  ospfAreaAggregateExtRouteTag OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION
          "External route tag to be included in NSSA (type-7)
           LSAs."



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       DEFVAL { 0 }
       ::= { ospfAreaAggregateEntry 7 }

--  OSPF Link State Database, link-local for non-virtual links


  ospfLocalLsdbTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfLocalLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The OSPF Process's link-local link state database
          for non-virtual links.
          This table is identical to the OSPF LSDB Table
          in format, but contains only link-local Link State
          Advertisements for non-virtual links.  The purpose is
          to allow link-local LSAs to be displayed for each
          non-virtual interface.  This table is implemented to
          support type-9 LSAs that are defined
          in 'The OSPF Opaque LSA Option'."
       REFERENCE
          "OSPF Version 2, Section 12 Link State Advertisements
          and The OSPF Opaque LSA Option"
       ::= { ospf 17 }

  ospfLocalLsdbEntry OBJECT-TYPE
       SYNTAX       OspfLocalLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A single link state advertisement."
       INDEX { ospfLocalLsdbIpAddress, ospfLocalLsdbAddressLessIf,
          ospfLocalLsdbType, ospfLocalLsdbLsid, ospfLocalLsdbRouterId
          }
       ::= { ospfLocalLsdbTable 1 }

  OspfLocalLsdbEntry ::=
       SEQUENCE {
          ospfLocalLsdbIpAddress
             IpAddress,
          ospfLocalLsdbAddressLessIf
             InterfaceIndexOrZero,
          ospfLocalLsdbType
             INTEGER,
          ospfLocalLsdbLsid
             IpAddress,
          ospfLocalLsdbRouterId
             RouterID,



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          ospfLocalLsdbSequence
             Integer32,
          ospfLocalLsdbAge
             Integer32,
          ospfLocalLsdbChecksum
             Integer32,
          ospfLocalLsdbAdvertisement
             OCTET STRING
          }

  ospfLocalLsdbIpAddress OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The IP address of the interface from
          which the LSA was received if the interface is
          numbered."
       REFERENCE
          "OSPF Version 2, Appendix C.3 Interface parameters"
       ::= { ospfLocalLsdbEntry 1 }

  ospfLocalLsdbAddressLessIf OBJECT-TYPE
       SYNTAX       InterfaceIndexOrZero
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The interface index of the interface from
          which the LSA was received if the interface is
          unnumbered."
       REFERENCE
          "OSPF Version 2, Appendix C.3 Interface parameters"
       ::= { ospfLocalLsdbEntry 2 }

  ospfLocalLsdbType OBJECT-TYPE
       SYNTAX       INTEGER { localOpaqueLink (9) }
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The type of the link state advertisement.
          Each link state type has a separate
          advertisement format."
       REFERENCE
          "OSPF Version 2, Appendix A.4.1 The Link State
          Advertisement header"
       ::= { ospfLocalLsdbEntry 3 }

  ospfLocalLsdbLsid OBJECT-TYPE



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       SYNTAX       IpAddress
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The Link State ID is an LS Type Specific field
          containing a 32-bit identifier in IP address format;
          it identifies the piece of the routing domain
          that is being described by the advertisement."
       REFERENCE
         "OSPF Version 2, Section 12.1.4 Link State ID"
       ::= { ospfLocalLsdbEntry 4 }

  ospfLocalLsdbRouterId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The 32-bit number that uniquely identifies the
          originating router in the Autonomous System."
       REFERENCE
          "OSPF Version 2, Appendix C.1 Global parameters"
       ::= { ospfLocalLsdbEntry 5 }

  ospfLocalLsdbSequence OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The sequence number field is a signed 32-bit
          integer.  It starts with the value '80000001'h,
          or -'7FFFFFFF'h, and increments until '7FFFFFFF'h.
          Thus, a typical sequence number will be very negative.
          It is used to detect old and duplicate link state
          advertisements.  The space of sequence numbers is linearly
          ordered.  The larger the sequence number, the more recent
          the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.6 LS sequence
          number"
       ::= { ospfLocalLsdbEntry 6 }

  ospfLocalLsdbAge OBJECT-TYPE
       SYNTAX       Integer32 -- Should be 0..MaxAge, except when
                              -- doNotAge bit is set
       UNITS        "seconds"
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION



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          "This field is the age of the link state
          advertisement in seconds."
       REFERENCE
          "OSPF Version 2, Section 12.1.1 LS age"
       ::= { ospfLocalLsdbEntry 7 }

  ospfLocalLsdbChecksum OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "This field is the checksum of the complete
          contents of the advertisement, excepting the
          age field.  The age field is excepted so that
          an advertisement's age can be incremented
          without updating the checksum.  The checksum
          used is the same that is used for ISO
          connectionless datagrams; it is commonly referred
          to as the Fletcher checksum."
       REFERENCE
          "OSPF Version 2, Section 12.1.7 LS checksum"
       ::= { ospfLocalLsdbEntry 8 }

  ospfLocalLsdbAdvertisement OBJECT-TYPE
       SYNTAX       OCTET STRING (SIZE (1..65535))
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The entire link state advertisement, including
          its header.

          Note that for variable length LSAs, SNMP agents
          may not be able to return the largest string size."
       REFERENCE
          "OSPF Version 2, Section 12 Link State
          Advertisements"
       ::= { ospfLocalLsdbEntry 9 }

--  OSPF Link State Database, link-local for virtual Links

  ospfVirtLocalLsdbTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfVirtLocalLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The OSPF Process's link-local link state database
          for virtual links.




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          This table is identical to the OSPF LSDB Table
          in format, but contains only link-local Link State
          Advertisements for virtual links.  The purpose is to
          allow link-local LSAs to be displayed for each virtual
          interface.  This table is implemented to support type-9 LSAs
          that are defined in 'The OSPF Opaque LSA Option'."
       REFERENCE
          "OSPF Version 2, Section 12 Link State
          Advertisements and The OSPF Opaque LSA Option"
       ::= { ospf 18 }

  ospfVirtLocalLsdbEntry OBJECT-TYPE
       SYNTAX       OspfVirtLocalLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A single link state advertisement."
       INDEX { ospfVirtLocalLsdbTransitArea,
          ospfVirtLocalLsdbNeighbor,
          ospfVirtLocalLsdbType,
          ospfVirtLocalLsdbLsid,
          ospfVirtLocalLsdbRouterId
          }
       ::= { ospfVirtLocalLsdbTable 1 }

  OspfVirtLocalLsdbEntry ::=
       SEQUENCE {
          ospfVirtLocalLsdbTransitArea
             AreaID,
          ospfVirtLocalLsdbNeighbor
             RouterID,
          ospfVirtLocalLsdbType
             INTEGER,
          ospfVirtLocalLsdbLsid
             IpAddress,
          ospfVirtLocalLsdbRouterId
             RouterID,
          ospfVirtLocalLsdbSequence
             Integer32,
          ospfVirtLocalLsdbAge
             Integer32,
          ospfVirtLocalLsdbChecksum
             Integer32,
          ospfVirtLocalLsdbAdvertisement
            OCTET STRING
          }

  ospfVirtLocalLsdbTransitArea OBJECT-TYPE



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       SYNTAX       AreaID
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The transit area that the virtual link
          traverses.  By definition, this is not 0.0.0.0."
       REFERENCE
          "OSPF Version 2, Appendix C.3 Interface parameters"
       ::= { ospfVirtLocalLsdbEntry 1 }

  ospfVirtLocalLsdbNeighbor OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The Router ID of the virtual neighbor."
       REFERENCE
          "OSPF Version 2, Appendix C.3 Interface parameters"
       ::= { ospfVirtLocalLsdbEntry 2 }

  ospfVirtLocalLsdbType OBJECT-TYPE
       SYNTAX       INTEGER  { localOpaqueLink (9) }
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The type of the link state advertisement.
          Each link state type has a separate
          advertisement format."
       REFERENCE
          "OSPF Version 2, Appendix A.4.1 The Link State
          Advertisement header"
       ::= { ospfVirtLocalLsdbEntry 3 }

  ospfVirtLocalLsdbLsid OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The Link State ID is an LS Type Specific field
          containing a 32-bit identifier in IP address format;
          it identifies the piece of the routing domain
          that is being described by the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.4 Link State ID"
       ::= { ospfVirtLocalLsdbEntry 4 }

  ospfVirtLocalLsdbRouterId OBJECT-TYPE
       SYNTAX       RouterID



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       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The 32-bit number that uniquely identifies the
          originating router in the Autonomous System."
       REFERENCE
          "OSPF Version 2, Appendix C.1 Global parameters"
       ::= { ospfVirtLocalLsdbEntry 5 }

  ospfVirtLocalLsdbSequence OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The sequence number field is a signed 32-bit
          integer.  It starts with the value '80000001'h,
          or -'7FFFFFFF'h, and increments until '7FFFFFFF'h.
          Thus, a typical sequence number will be very negative.
          It is used to detect old and duplicate link state
          advertisements.  The space of sequence numbers is linearly
          ordered.  The larger the sequence number, the more recent
          the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.6 LS sequence
          number"
       ::= { ospfVirtLocalLsdbEntry 6 }

  ospfVirtLocalLsdbAge OBJECT-TYPE
       SYNTAX       Integer32 -- Should be 0..MaxAge, except when
                              -- doNotAge bit is set
       UNITS        "seconds"
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "This field is the age of the link state
          advertisement in seconds."
       REFERENCE
          "OSPF Version 2, Section 12.1.1 LS age"
       ::= { ospfVirtLocalLsdbEntry 7 }

  ospfVirtLocalLsdbChecksum OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "This field is the checksum of the complete
          contents of the advertisement, excepting the
          age field.  The age field is excepted so that



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          an advertisement's age can be incremented
          without updating the checksum.  The checksum
          used is the same that is used for ISO
          connectionless datagrams; it is commonly
          referred to as the Fletcher checksum."
       REFERENCE
          "OSPF Version 2, Section 12.1.7 LS checksum"
       ::= { ospfVirtLocalLsdbEntry 8 }

  ospfVirtLocalLsdbAdvertisement OBJECT-TYPE
       SYNTAX       OCTET STRING (SIZE (1..65535))
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The entire link state advertisement, including
          its header."
       REFERENCE
          "OSPF Version 2, Section 12 Link State
          Advertisements.

          Note that for variable length LSAs, SNMP agents
          may not be able to return the largest string size."
       ::= { ospfVirtLocalLsdbEntry 9 }

--  OSPF Link State Database, AS-scope

  ospfAsLsdbTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF OspfAsLsdbEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The OSPF Process's AS-scope LSA link state database.
           The database contains the AS-scope Link State
           Advertisements from throughout the areas that
           the device is attached to.

           This table is identical to the OSPF LSDB Table
           in format, but contains only AS-scope Link State
           Advertisements.  The purpose is to allow AS-scope
           LSAs to be displayed once for the router rather
           than once in each non-stub area."
       REFERENCE
          "OSPF Version 2, Section 12 Link State
          Advertisements"
       ::= { ospf 19 }

  ospfAsLsdbEntry OBJECT-TYPE
       SYNTAX       OspfAsLsdbEntry



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       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "A single link state advertisement."
       INDEX { ospfAsLsdbType, ospfAsLsdbLsid, ospfAsLsdbRouterId }
       ::= { ospfAsLsdbTable 1 }

  OspfAsLsdbEntry ::=
       SEQUENCE {
          ospfAsLsdbType
             INTEGER,
          ospfAsLsdbLsid
             IpAddress,
          ospfAsLsdbRouterId
             RouterID,
          ospfAsLsdbSequence
             Integer32,
          ospfAsLsdbAge
             Integer32,
          ospfAsLsdbChecksum
             Integer32,
          ospfAsLsdbAdvertisement
             OCTET STRING
          }

  ospfAsLsdbType OBJECT-TYPE
       SYNTAX      INTEGER {
                      asExternalLink (5),
                      asOpaqueLink   (11)
                      }
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The type of the link state advertisement.
          Each link state type has a separate
          advertisement format."
       REFERENCE
          "OSPF Version 2, Appendix A.4.1 The Link State
          Advertisement header"
       ::= { ospfAsLsdbEntry 1 }

  ospfAsLsdbLsid OBJECT-TYPE
       SYNTAX       IpAddress
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The Link State ID is an LS Type Specific field
          containing either a Router ID or an IP address;



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          it identifies the piece of the routing domain
          that is being described by the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.4 Link State ID"
       ::= { ospfAsLsdbEntry 2 }

  ospfAsLsdbRouterId OBJECT-TYPE
       SYNTAX       RouterID
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION
          "The 32-bit number that uniquely identifies the
          originating router in the Autonomous System."
       REFERENCE
          "OSPF Version 2, Appendix C.1 Global parameters"
       ::= { ospfAsLsdbEntry 3 }

  ospfAsLsdbSequence OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The sequence number field is a signed 32-bit
          integer.  It starts with the value '80000001'h,
          or -'7FFFFFFF'h, and increments until '7FFFFFFF'h.
          Thus, a typical sequence number will be very negative.
          It is used to detect old and duplicate link state
          advertisements.  The space of sequence numbers is linearly
          ordered.  The larger the sequence number, the more recent
          the advertisement."
       REFERENCE
          "OSPF Version  2,  Section  12.1.6  LS  sequence
          number"
       ::= { ospfAsLsdbEntry 4 }

  ospfAsLsdbAge OBJECT-TYPE
       SYNTAX       Integer32 -- Should be 0..MaxAge, except when
                              -- doNotAge bit is set
       UNITS        "seconds"
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "This field is the age of the link state
          advertisement in seconds."
       REFERENCE
          "OSPF Version 2, Section 12.1.1 LS age"
       ::= { ospfAsLsdbEntry 5 }




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  ospfAsLsdbChecksum OBJECT-TYPE
       SYNTAX       Integer32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "This field is the checksum of the complete
          contents of the advertisement, excepting the
          age field.  The age field is excepted so that
          an advertisement's age can be incremented
          without updating the checksum.  The checksum
          used is the same that is used for ISO
          connectionless datagrams; it is commonly referred
          to as the Fletcher checksum."
       REFERENCE
          "OSPF Version 2, Section 12.1.7 LS checksum"
       ::= { ospfAsLsdbEntry 6 }

  ospfAsLsdbAdvertisement OBJECT-TYPE
       SYNTAX       OCTET STRING (SIZE (1..65535))
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION
          "The entire link state advertisement, including
          its header."
       REFERENCE
          "OSPF Version 2, Section 12 Link State
          Advertisements.

          Note that for variable length LSAs, SNMP agents
          may not be able to return the largest string size."
       ::= { ospfAsLsdbEntry 7 }

 --  OSPF Area LSA Counter Table

      ospfAreaLsaCountTable OBJECT-TYPE
          SYNTAX       SEQUENCE OF OspfAreaLsaCountEntry
          MAX-ACCESS   not-accessible
          STATUS       current
          DESCRIPTION
             "This table maintains per-area, per-LSA-type counters"
          ::= { ospf 20 }

      ospfAreaLsaCountEntry OBJECT-TYPE
          SYNTAX       OspfAreaLsaCountEntry
          MAX-ACCESS   not-accessible
          STATUS       current
          DESCRIPTION
             "An entry with a number of link advertisements



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              of a given type for a given area."
          INDEX { ospfAreaLsaCountAreaId, ospfAreaLsaCountLsaType }
          ::= { ospfAreaLsaCountTable 1 }

      OspfAreaLsaCountEntry ::=
           SEQUENCE {
              ospfAreaLsaCountAreaId
                 AreaID,
              ospfAreaLsaCountLsaType
                 INTEGER,
              ospfAreaLsaCountNumber
                 Gauge32
           }

      ospfAreaLsaCountAreaId OBJECT-TYPE
          SYNTAX       AreaID
          MAX-ACCESS   not-accessible
          STATUS       current
          DESCRIPTION
             "This entry Area ID."
         ::= { ospfAreaLsaCountEntry 1 }

      ospfAreaLsaCountLsaType OBJECT-TYPE
          SYNTAX       INTEGER {
                          routerLink (1),
                          networkLink (2),
                          summaryLink (3),
                          asSummaryLink (4),
                          multicastLink (6),
                          nssaExternalLink (7),
                          areaOpaqueLink (10)
                       }
          MAX-ACCESS   not-accessible
          STATUS       current
          DESCRIPTION
             "This entry LSA type."
         ::= { ospfAreaLsaCountEntry 2 }

      ospfAreaLsaCountNumber OBJECT-TYPE
          SYNTAX       Gauge32
          MAX-ACCESS   read-only
          STATUS       current
          DESCRIPTION
             "Number of LSAs of a given type for a given area."
         ::= { ospfAreaLsaCountEntry 3 }

-- conformance information




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ospfConformance OBJECT IDENTIFIER ::= { ospf 15 }

ospfGroups      OBJECT IDENTIFIER ::= { ospfConformance 1 }
ospfCompliances OBJECT IDENTIFIER ::= { ospfConformance 2 }

-- compliance statements

  ospfCompliance MODULE-COMPLIANCE
       STATUS       deprecated
       DESCRIPTION
          "The compliance statement for OSPF systems
          conforming to RFC 1850."
       MODULE       -- this module
       MANDATORY-GROUPS {
           ospfBasicGroup,
           ospfAreaGroup,
           ospfStubAreaGroup,
           ospfIfGroup,
           ospfIfMetricGroup,
           ospfVirtIfGroup,
           ospfNbrGroup,
           ospfVirtNbrGroup,
           ospfAreaAggregateGroup
           }
       GROUP  ospfHostGroup
          DESCRIPTION
             "This group is mandatory for OSPF systems that support
             attached hosts."
       GROUP  ospfLsdbGroup
          DESCRIPTION
             "This group is mandatory for OSPF systems that display
             their per-area link state database."
       GROUP  ospfExtLsdbGroup
          DESCRIPTION
             "This group is mandatory for OSPF systems that display
             their external link state database."
       ::= { ospfCompliances 1 }

  ospfCompliance2 MODULE-COMPLIANCE
       STATUS       current
       DESCRIPTION
          "The compliance statement."
       MODULE       -- this module
       MANDATORY-GROUPS {
          ospfBasicGroup2,
          ospfAreaGroup2,
          ospfStubAreaGroup,
          ospfIfGroup2,



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          ospfIfMetricGroup,
          ospfVirtIfGroup2,
          ospfNbrGroup2,
          ospfVirtNbrGroup2,
          ospfAreaAggregateGroup2
          }
       GROUP  ospfHostGroup2
          DESCRIPTION
             "This group is mandatory for OSPF systems that support
             attached hosts."
       GROUP  ospfLsdbGroup
          DESCRIPTION
             "This group is mandatory for OSPF systems that display
             their per-area link state database."
       GROUP  ospfAsLsdbGroup
          DESCRIPTION
             "This group is mandatory for OSPF systems that display
             their AS-scope link state database."
       GROUP  ospfLocalLsdbGroup
          DESCRIPTION
             "This group is mandatory for OSPF systems that display
             their per-link link state database for non-virtual
             links."
       GROUP  ospfVirtLocalLsdbGroup
          DESCRIPTION
             "This group is mandatory for OSPF systems that display
             their per-link link state database for virtual links."
       GROUP ospfAreaLsaCountGroup
          DESCRIPTION
             "This group is mandatory for OSPF systems that display
             per-area, per-LSA-type counters."
       ::= { ospfCompliances 2 }

  ospfComplianceObsolete MODULE-COMPLIANCE
       STATUS       obsolete
       DESCRIPTION
          "Contains obsolete object groups."
       MODULE       -- this module
       GROUP  ospfAreaRangeGroup
          DESCRIPTION
             "This group is obsolete, and it is mandatory only
             for non-Classless Inter-Domain Routing (CIDR) OSPF
             systems that support multiple areas."
       GROUP  ospfObsoleteGroup
          DESCRIPTION
             "This group contains obsolete objects,
             which are no longer required for OSPF systems."
       ::= { ospfCompliances 3 }



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--  units of conformance

  ospfBasicGroup    OBJECT-GROUP
       OBJECTS {
          ospfRouterId,
          ospfAdminStat,
          ospfVersionNumber,
          ospfAreaBdrRtrStatus,
          ospfASBdrRtrStatus,
          ospfExternLsaCount,
          ospfExternLsaCksumSum,
          ospfTOSSupport,
          ospfOriginateNewLsas,
          ospfRxNewLsas,
          ospfExtLsdbLimit,
          ospfMulticastExtensions,
          ospfExitOverflowInterval,
          ospfDemandExtensions
          }
       STATUS      deprecated
       DESCRIPTION
          "These objects are used to monitor/manage
          global OSPF parameters.  This object group
          conforms to RFC 1850."
       ::= { ospfGroups 1 }

  ospfAreaGroup    OBJECT-GROUP
       OBJECTS {
          ospfAreaId,
          ospfImportAsExtern,
          ospfSpfRuns,
          ospfAreaBdrRtrCount,
          ospfAsBdrRtrCount,
          ospfAreaLsaCount,
          ospfAreaLsaCksumSum,
          ospfAreaSummary,
          ospfAreaStatus
          }
       STATUS      deprecated
       DESCRIPTION
          "These objects are used for OSPF systems
          supporting areas per RFC 1850."
       ::= { ospfGroups 2 }

  ospfStubAreaGroup    OBJECT-GROUP
       OBJECTS {
          ospfStubAreaId,
          ospfStubTOS,



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          ospfStubMetric,
          ospfStubStatus,
          ospfStubMetricType
          }
       STATUS       current
       DESCRIPTION
          "These objects are used for OSPF systems
          supporting stub areas."
       ::= { ospfGroups 3 }

   ospfLsdbGroup    OBJECT-GROUP
       OBJECTS {
          ospfLsdbAreaId,
          ospfLsdbType,
          ospfLsdbLsid,
          ospfLsdbRouterId,
          ospfLsdbSequence,
          ospfLsdbAge,
          ospfLsdbChecksum,
          ospfLsdbAdvertisement
          }
       STATUS       current
       DESCRIPTION
          "These objects are used for OSPF systems
          that display their link state database."
       ::= { ospfGroups 4 }

   ospfAreaRangeGroup    OBJECT-GROUP
       OBJECTS {
          ospfAreaRangeAreaId,
          ospfAreaRangeNet,
          ospfAreaRangeMask,
          ospfAreaRangeStatus,
          ospfAreaRangeEffect
          }
       STATUS  obsolete
       DESCRIPTION
          "These objects are used for non-CIDR OSPF
          systems that support multiple areas.  This
          object group is obsolete."
       ::= { ospfGroups 5 }

  ospfHostGroup    OBJECT-GROUP
       OBJECTS {
          ospfHostIpAddress,
          ospfHostTOS,
          ospfHostMetric,
          ospfHostStatus,



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          ospfHostAreaID
          }
       STATUS       deprecated
       DESCRIPTION
          "These objects are used for OSPF systems
          that support attached hosts."
       ::= { ospfGroups 6 }

  ospfIfGroup    OBJECT-GROUP
       OBJECTS {
          ospfIfIpAddress,
          ospfAddressLessIf,
          ospfIfAreaId,
          ospfIfType,
          ospfIfAdminStat,
          ospfIfRtrPriority,
          ospfIfTransitDelay,
          ospfIfRetransInterval,
          ospfIfHelloInterval,
          ospfIfRtrDeadInterval,
          ospfIfPollInterval,
          ospfIfState,
          ospfIfDesignatedRouter,
          ospfIfBackupDesignatedRouter,
          ospfIfEvents,
          ospfIfAuthType,
          ospfIfAuthKey,
          ospfIfStatus,
          ospfIfMulticastForwarding,
          ospfIfDemand
          }
       STATUS       deprecated
       DESCRIPTION
          "These objects are used to monitor/manage OSPF
          interfaces.  This object group conforms to RFC 1850."
       ::= { ospfGroups 7 }

  ospfIfMetricGroup    OBJECT-GROUP
       OBJECTS {
          ospfIfMetricIpAddress,
          ospfIfMetricAddressLessIf,
          ospfIfMetricTOS,
          ospfIfMetricValue,
          ospfIfMetricStatus
          }
       STATUS       current
       DESCRIPTION
          "These objects are used for OSPF systems for supporting



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          interface metrics."
       ::= { ospfGroups 8 }

  ospfVirtIfGroup    OBJECT-GROUP
       OBJECTS {
          ospfVirtIfAreaId,
          ospfVirtIfNeighbor,
          ospfVirtIfTransitDelay,
          ospfVirtIfRetransInterval,
          ospfVirtIfHelloInterval,
          ospfVirtIfRtrDeadInterval,
          ospfVirtIfState,
          ospfVirtIfEvents,
          ospfVirtIfAuthType,
          ospfVirtIfAuthKey,
          ospfVirtIfStatus
          }
        STATUS       deprecated
        DESCRIPTION
          "These objects are used for OSPF systems for supporting
          virtual interfaces.  This object group conforms
          to RFC 1850."
        ::= { ospfGroups 9 }

  ospfNbrGroup    OBJECT-GROUP
       OBJECTS {
          ospfNbrIpAddr,
          ospfNbrAddressLessIndex,
          ospfNbrRtrId,
          ospfNbrOptions,
          ospfNbrPriority,
          ospfNbrState,
          ospfNbrEvents,
          ospfNbrLsRetransQLen,
          ospfNbmaNbrStatus,
          ospfNbmaNbrPermanence,
          ospfNbrHelloSuppressed
          }
       STATUS       deprecated
       DESCRIPTION
          "These objects are used to monitor/manage OSPF neighbors.
          This object group conforms to RFC 1850."
       ::= { ospfGroups 10 }

  ospfVirtNbrGroup    OBJECT-GROUP
       OBJECTS {
          ospfVirtNbrArea,
          ospfVirtNbrRtrId,



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          ospfVirtNbrIpAddr,
          ospfVirtNbrOptions,
          ospfVirtNbrState,
          ospfVirtNbrEvents,
          ospfVirtNbrLsRetransQLen,
          ospfVirtNbrHelloSuppressed
          }
       STATUS       deprecated
       DESCRIPTION
          "These objects are used to monitor/manage OSPF virtual
          neighbors.  This object group conforms to RFC 1850."

       ::= { ospfGroups 11 }

  ospfExtLsdbGroup    OBJECT-GROUP
       OBJECTS {
          ospfExtLsdbType,
          ospfExtLsdbLsid,
          ospfExtLsdbRouterId,
          ospfExtLsdbSequence,
          ospfExtLsdbAge,
          ospfExtLsdbChecksum,
          ospfExtLsdbAdvertisement
          }
       STATUS       deprecated
       DESCRIPTION
          "These objects are used for OSPF systems that display
          their link state database.  This object group
          conforms to RFC 1850.

          This object group is replaced by the ospfAsLsdbGroup
          in order to support any AS-scope LSA type in a single
          table."
       ::= { ospfGroups 12 }

  ospfAreaAggregateGroup    OBJECT-GROUP
       OBJECTS {
          ospfAreaAggregateAreaID,
          ospfAreaAggregateLsdbType,
          ospfAreaAggregateNet,
          ospfAreaAggregateMask,
          ospfAreaAggregateStatus,
          ospfAreaAggregateEffect
          }
       STATUS       deprecated
       DESCRIPTION
          "These objects are used for OSPF systems to support
          network prefix aggregation across areas."



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       ::= { ospfGroups 13 }

  ospfLocalLsdbGroup    OBJECT-GROUP
       OBJECTS {
          ospfLocalLsdbSequence,
          ospfLocalLsdbAge,
          ospfLocalLsdbChecksum,
          ospfLocalLsdbAdvertisement
          }
       STATUS      current
       DESCRIPTION
          "These objects are used for OSPF systems
          that display their link-local link state databases
          for non-virtual links."
        ::= { ospfGroups 14 }

  ospfVirtLocalLsdbGroup    OBJECT-GROUP
       OBJECTS {
          ospfVirtLocalLsdbSequence,
          ospfVirtLocalLsdbAge,
          ospfVirtLocalLsdbChecksum,
          ospfVirtLocalLsdbAdvertisement
          }
        STATUS       current
        DESCRIPTION
           "These objects are used for OSPF systems
           that display their link-local link state databases
           for virtual links."
         ::= { ospfGroups 15 }

  ospfAsLsdbGroup    OBJECT-GROUP
       OBJECTS {
          ospfAsLsdbSequence,
          ospfAsLsdbAge,
          ospfAsLsdbChecksum,
          ospfAsLsdbAdvertisement
          }
        STATUS       current
        DESCRIPTION
           "These objects are used for OSPF systems
           that display their AS-scope link state database."
         ::= { ospfGroups 16 }

  ospfBasicGroup2    OBJECT-GROUP
       OBJECTS {
          ospfRouterId,
          ospfAdminStat,
          ospfVersionNumber,



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          ospfAreaBdrRtrStatus,
          ospfASBdrRtrStatus,
          ospfExternLsaCount,
          ospfExternLsaCksumSum,
          ospfTOSSupport,
          ospfOriginateNewLsas,
          ospfRxNewLsas,
          ospfExtLsdbLimit,
          ospfMulticastExtensions,
          ospfExitOverflowInterval,
          ospfDemandExtensions,
          ospfRFC1583Compatibility,
          ospfOpaqueLsaSupport,
          ospfReferenceBandwidth,
          ospfRestartSupport,
          ospfRestartInterval,
          ospfRestartStrictLsaChecking,
          ospfRestartStatus,
          ospfRestartAge,
          ospfRestartExitReason,
          ospfAsLsaCount,
          ospfAsLsaCksumSum,
          ospfStubRouterSupport,
          ospfStubRouterAdvertisement,
          ospfDiscontinuityTime
          }
       STATUS       current
       DESCRIPTION
          "These objects are used to monitor/manage OSPF global
          parameters."
       ::= { ospfGroups 17 }

  ospfAreaGroup2    OBJECT-GROUP
       OBJECTS {
          ospfAreaId,
          ospfImportAsExtern,
          ospfSpfRuns,
          ospfAreaBdrRtrCount,
          ospfAsBdrRtrCount,
          ospfAreaLsaCount,
          ospfAreaLsaCksumSum,
          ospfAreaSummary,
          ospfAreaStatus,
          ospfAreaNssaTranslatorRole,
          ospfAreaNssaTranslatorState,
          ospfAreaNssaTranslatorStabilityInterval,
          ospfAreaNssaTranslatorEvents
          }



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       STATUS       current
       DESCRIPTION
            "These objects are used by OSPF systems
            to support areas."
       ::= { ospfGroups 18 }

  ospfIfGroup2    OBJECT-GROUP
       OBJECTS {
          ospfIfIpAddress,
          ospfAddressLessIf,
          ospfIfAreaId,
          ospfIfType,
          ospfIfAdminStat,
          ospfIfRtrPriority,
          ospfIfTransitDelay,
          ospfIfRetransInterval,
          ospfIfHelloInterval,
          ospfIfRtrDeadInterval,
          ospfIfPollInterval,
          ospfIfState,
          ospfIfDesignatedRouter,
          ospfIfBackupDesignatedRouter,
          ospfIfEvents,
          ospfIfAuthType,
          ospfIfAuthKey,
          ospfIfStatus,
          ospfIfMulticastForwarding,
          ospfIfDemand,
          ospfIfLsaCount,
          ospfIfLsaCksumSum
          }
       STATUS       current
       DESCRIPTION
          "These objects are used to monitor/manage OSPF interfaces."
        ::= { ospfGroups 19 }

  ospfVirtIfGroup2    OBJECT-GROUP
       OBJECTS {
          ospfVirtIfAreaId,
          ospfVirtIfNeighbor,
          ospfVirtIfTransitDelay,
          ospfVirtIfRetransInterval,
          ospfVirtIfHelloInterval,
          ospfVirtIfRtrDeadInterval,
          ospfVirtIfState,
          ospfVirtIfEvents,
          ospfVirtIfAuthType,
          ospfVirtIfAuthKey,



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          ospfVirtIfStatus,
          ospfVirtIfLsaCount,
          ospfVirtIfLsaCksumSum,
          ospfIfDesignatedRouterId,
          ospfIfBackupDesignatedRouterId
          }
       STATUS       current
       DESCRIPTION
          "These objects are used to monitor/manage OSPF
          virtual interfaces."
       ::= { ospfGroups 20 }

  ospfNbrGroup2    OBJECT-GROUP
       OBJECTS {
          ospfNbrIpAddr,
          ospfNbrAddressLessIndex,
          ospfNbrRtrId,
          ospfNbrOptions,
          ospfNbrPriority,
          ospfNbrState,
          ospfNbrEvents,
          ospfNbrLsRetransQLen,
          ospfNbmaNbrStatus,
          ospfNbmaNbrPermanence,
          ospfNbrHelloSuppressed,
          ospfNbrRestartHelperStatus,
          ospfNbrRestartHelperAge,
          ospfNbrRestartHelperExitReason
          }
       STATUS       current
       DESCRIPTION
          "These objects are used to monitor/manage OSPF
          neighbors."
       ::= { ospfGroups 21 }

  ospfVirtNbrGroup2    OBJECT-GROUP
       OBJECTS {
          ospfVirtNbrArea,
          ospfVirtNbrRtrId,
          ospfVirtNbrIpAddr,
          ospfVirtNbrOptions,
          ospfVirtNbrState,
          ospfVirtNbrEvents,
          ospfVirtNbrLsRetransQLen,
          ospfVirtNbrHelloSuppressed,
          ospfVirtNbrRestartHelperStatus,
          ospfVirtNbrRestartHelperAge,
          ospfVirtNbrRestartHelperExitReason



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          }
       STATUS       current
       DESCRIPTION
          "These objects are used to monitor/manage OSPF
          virtual neighbors."
       ::= { ospfGroups 22 }

  ospfAreaAggregateGroup2    OBJECT-GROUP
       OBJECTS {
          ospfAreaAggregateAreaID,
          ospfAreaAggregateLsdbType,
          ospfAreaAggregateNet,
          ospfAreaAggregateMask,
          ospfAreaAggregateStatus,
          ospfAreaAggregateEffect,
          ospfAreaAggregateExtRouteTag
          }
       STATUS       current
       DESCRIPTION
          "These objects are used for OSPF systems to support
          network prefix aggregation across areas."
       ::= { ospfGroups 23 }

  ospfAreaLsaCountGroup      OBJECT-GROUP
       OBJECTS {
          ospfAreaLsaCountNumber
          }
       STATUS       current
       DESCRIPTION
          "These objects are used for OSPF systems that display
          per-area, per-LSA-type counters."
       ::= { ospfGroups 24 }

  ospfHostGroup2    OBJECT-GROUP
       OBJECTS {
          ospfHostIpAddress,
          ospfHostTOS,
          ospfHostMetric,
          ospfHostStatus,
          ospfHostCfgAreaID
          }
       STATUS       current
       DESCRIPTION
          "These objects are used for OSPF systems
          that support attached hosts."
       ::= { ospfGroups 25 }

--     This object group is included for SMI conformance.  It is not a



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--     mandatory group for compliance with this MIB

  ospfObsoleteGroup    OBJECT-GROUP
       OBJECTS {
          ospfAuthType
          }
       STATUS       obsolete
       DESCRIPTION
          "These objects are obsolete and are no longer required for
          OSPF systems.  They are placed into this group for SMI
          conformance."
       ::= { ospfGroups 26 }

END

4.  OSPF Trap Overview

4.1.  Introduction

   OSPF is an event-driven routing protocol, where an event can be a
   change in an OSPF interface's link-level status, the expiration of an
   OSPF timer, or the reception of an OSPF protocol packet.  Many of the
   actions that OSPF takes as a result of these events will result in a
   change of the routing topology.

   As routing topologies become large and complex, it is often difficult
   to locate the source of a topology change or unpredicted routing path
   by polling a large number or routers.  Because of the difficulty of
   polling a large number of devices, a more prudent approach is for
   devices to notify a network manager of potentially critical OSPF
   events using SNMP traps.

   This section defines a set of traps, objects, and mechanisms to
   enhance the ability to manage IP internetworks that use OSPF as their
   Interior Gateway Protocol (IGP).  It is an optional but very useful
   extension to the OSPF MIB.















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4.2.  Approach

   The mechanism for sending traps is straightforward.  When an
   exception event occurs, the application notifies the local agent, who
   sends a trap to the appropriate SNMP management stations.  The
   message includes the trap type and may include a list of trap-
   specific variables.  Section 5 gives the trap definitions, which
   includes the variable lists.  The Router ID of the originator of the
   trap is included in the variable list so that the network manager may
   easily determine the source of the trap.

   To limit the frequency of OSPF traps, the following additional
   mechanisms are suggested.

4.3.  Ignoring Initial Activity

   The majority of critical events occur when OSPF is enabled on a
   router, at which time the designated router is elected and neighbor
   adjacencies are formed.  During this initial period, a potential
   flood of traps is unnecessary since the events are expected.  To
   avoid unnecessary traps, a router should not originate expected OSPF
   interface-related traps until two of that interface's dead timer
   intervals have elapsed.  The expected OSPF interface traps are
   ospfIfStateChange, ospfVirtIfStateChange, ospfNbrStateChange,
   ospfVirtNbrStateChange, ospfTxRetransmit, and ospfVirtIfTxRetransmit.
   Additionally, ospfMaxAgeLsa and ospfOriginateLsa traps should not be
   originated until two dead timer intervals have elapsed where the dead
   timer interval used should be the dead timer with the smallest value.

4.4.  Throttling Traps

   The mechanism for throttling the traps is similar to the mechanism
   explained in RFC 1224 [RFC1224].  The basic premise of the throttling
   mechanism is that of a sliding window, defined in seconds and an
   upper bound on the number of traps that may be generated within this
   window.  Note that unlike RFC 1224, traps are not sent to inform the
   network manager that the throttling mechanism has kicked in.

   A single window should be used to throttle all OSPF trap types except
   for the ospfLsdbOverflow and the ospfLsdbApproachingOverflow traps,
   which should not be throttled.  For example, with a window time of 3,
   an upper bound of 3, and events to cause trap types 1, 3, 5, and 7 (4
   traps within a 3-second period), the type-7 (the 4th) trap should not
   be generated.

   Appropriate values are 7 traps with a window time of 10 seconds.





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4.5.  One Trap Per OSPF Event

   Several of the traps defined in section 5 are generated as the result
   of finding an unusual condition while parsing an OSPF packet or a
   processing a timer event.  There may be more than one unusual
   condition detected while handling the event.  For example, a link
   state update packet may contain several retransmitted link state
   advertisements (LSAs), or a retransmitted database description packet
   may contain several database description entries.  To limit the
   number of traps and variables, OSPF should generate at most one trap
   per OSPF event.  Only the variables associated with the first unusual
   condition should be included with the trap.  Similarly, if more than
   one type of unusual condition is encountered while parsing the
   packet, only the first event will generate a trap.

4.6.  Polling Event Counters

   Many of the tables in the OSPF MIB contain generalized event
   counters.  By enabling the traps defined in this document, a network
   manager can obtain more specific information about these events.  A
   network manager may want to poll these event counters and enable
   specific OSPF traps when a particular counter starts increasing
   abnormally.

   The following table shows the relationship between the event counters
   defined in the OSPF MIB and the trap types.

         Counter32                   Trap Type
   -----------------------   ------------------------
     ospfOriginateNewLsas       ospfOriginateLsa
     ospfIfEvents               ospfIfStateChange
                                ospfConfigError
                                ospfIfAuthFailure
                                ospfRxBadPacket
                                ospfTxRetransmit
     ospfVirtIfEvents           ospfVirtIfStateChange
                                ospfVirtIfConfigError
                                ospfVirtIfAuthFailure
                                ospfVirtIfRxBadPacket
                                ospfVirtIfTxRetransmit
     ospfNbrEvents              ospfNbrStateChange
     ospfVirtNbrEvents          ospfVirtNbrStateChange
     ospfExternLSACount         ospfLsdbApproachingOverflow
     ospfExternLSACount         ospfLsdbOverflow







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4.7.  Translating Notification Parameters

   The definition of the OSPF notifications pre-dates the RFC 2578
   [RFC2578] requirement of having a zero value for the penultimate
   sub-identifier for translating SNMPv2/SNMPv3 trap parameters to
   SNMPv1 trap parameters.  RFC 3584 [RFC3584], section 3, defines the
   translation rules that can be implemented by intermediate proxy-
   agents or multi-lingual agents to convert SNMPv2/SNMPv3 notifications
   to SNMPv1 notifications and vice versa.  The conversion is not
   reversible, that is, a conversion to one SNMP version and then back
   again will result in an incorrectly formatted version of the
   notification.

   According to the rules specified in RFC 3584, section 3.1,
   translation of OSPF notifications from SNMPv1 to SNMPv2/SNMPv3 would
   result in the SNMPv2/SNMPv3 snmpTrapOID being the concatenation of
   the SNMPv1 'enterprise' parameter and two additional sub-identifiers,
   '0' and the SNMPv1 'specific-trap' parameter.

   According to the rules specified in RFC 3584, section 3.2,
   translation of OSPF notifications from SNMPv2/SNMPv3 to SNMPv1, as
   the notifications are defined in this MIB, would result in the SNMPv1
   'enterprise' parameter being set to the SNMPv2/SNMPv3 snmpTrapOID
   parameter value with the last sub-identifier removed and the
   'specific-trap' parameter being set to the last sub-identifier of the
   SNMPv2/SNMPv3 snmpTrapOID parameter.

   Note that a notification originated from an SNMPv1 agent will not be
   converted into the same notification that would be originated from a
   native SNMPv2/SNMPv3 agent.

4.8.  Historical Artifacts

   The MIB modules that are updated by this document were originally
   written in SMIv1 for SNMPv1 when only traps were used.  Since this
   version of the MIB module is written in SMIv2, it should be
   understood that all types of notifications, trap and inform PDUs, may
   be used by native SNMPv2 and SNMPv3 agents, although only traps are
   mentioned.  Also, for backwards compatibility, the OSPF Trap module
   remains rooted at {ospf 16}.











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5.  OSPF Trap Definitions

   OSPF-TRAP-MIB DEFINITIONS ::= BEGIN

   IMPORTS
       MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, IpAddress
                    FROM SNMPv2-SMI
       MODULE-COMPLIANCE, OBJECT-GROUP, NOTIFICATION-GROUP
                    FROM SNMPv2-CONF
       ospfRouterId, ospfIfIpAddress, ospfAddressLessIf, ospfIfState,
       ospfVirtIfAreaId, ospfVirtIfNeighbor, ospfVirtIfState,
       ospfNbrIpAddr, ospfNbrAddressLessIndex, ospfNbrRtrId,
       ospfNbrState, ospfVirtNbrArea, ospfVirtNbrRtrId,
       ospfVirtNbrState, ospfLsdbType, ospfLsdbLsid, ospfLsdbRouterId,
       ospfLsdbAreaId, ospfExtLsdbLimit, ospf, ospfAreaId,
       ospfAreaNssaTranslatorState, ospfRestartStatus,
       ospfRestartInterval, ospfRestartExitReason,
       ospfNbrRestartHelperStatus, ospfNbrRestartHelperAge,
       ospfNbrRestartHelperExitReason, ospfVirtNbrRestartHelperStatus,
       ospfVirtNbrRestartHelperAge, ospfVirtNbrRestartHelperExitReason
                    FROM OSPF-MIB;

     ospfTrap MODULE-IDENTITY

          LAST-UPDATED "200611100000Z" -- November 10, 2006 00:00:00 EST
          ORGANIZATION "IETF OSPF Working Group"
          CONTACT-INFO
          "WG E-Mail: ospf@ietf.org

           WG Chairs: acee@cisco.com
                      rohit@gmail.com

           Editors:   Dan Joyal
                      Nortel
                      600 Technology Park Drive
                      Billerica, MA  01821
                      djoyal@nortel.com

                      Piotr Galecki
                      Airvana
                      19 Alpha Road
                      Chelmsford, MA 01824
                      pgalecki@airvana.com

                      Spencer Giacalone
                      CSFB
                      Eleven Madison Ave
                      New York, NY 10010-3629



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                      spencer.giacalone@gmail.com"

          DESCRIPTION
             "The MIB module to describe traps for the OSPF
             Version 2 Protocol.

             Copyright (C) The IETF Trust (2006).
             This version of this MIB module is part of
             RFC 4750;  see the RFC itself for full legal
             notices."

          REVISION "200611100000Z" -- November 10, 2006 00:00:00 EST
          DESCRIPTION
             "Updated for latest changes to OSPFv2:
              -added graceful restart related traps
              -added new config error types
              -added ospfNssaTranslatorStatusChange trap.
              See Appendix B of RFC 4750 for more details.

             This version published as part of RFC 4750"

          REVISION "199501201225Z" -- Fri Jan 20 12:25:50 PST 1995
          DESCRIPTION
             "The initial SMIv2 revision of this MIB module, published
             in RFC 1850."

          ::= { ospf 16 }

   --  Trap Support Objects

   --  The following are support objects for the OSPF traps.

     ospfTrapControl OBJECT IDENTIFIER ::= { ospfTrap 1 }
     ospfTraps OBJECT IDENTIFIER ::= { ospfTrap 2 }

     ospfSetTrap OBJECT-TYPE
          SYNTAX       OCTET STRING (SIZE(4))
          MAX-ACCESS   read-write
          STATUS       current
          DESCRIPTION
             "A 4-octet string serving as a bit map for
             the trap events defined by the OSPF traps.  This
             object is used to enable and disable specific
             OSPF traps where a 1 in the bit field
             represents enabled.  The right-most bit (least
             significant) represents trap 0.

             This object is persistent and when written



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             the entity SHOULD save the change to non-volatile
             storage."
           ::= { ospfTrapControl 1 }

     ospfConfigErrorType OBJECT-TYPE
          SYNTAX       INTEGER {
                          badVersion (1),
                          areaMismatch (2),
                          unknownNbmaNbr (3), -- Router is DR eligible
                          unknownVirtualNbr (4),
                          authTypeMismatch(5),
                          authFailure (6),
                          netMaskMismatch (7),
                          helloIntervalMismatch (8),
                          deadIntervalMismatch (9),
                          optionMismatch (10),
                          mtuMismatch (11),
                          duplicateRouterId (12),
                          noError (13) }
          MAX-ACCESS   read-only
          STATUS   current
          DESCRIPTION
             "Potential types of configuration conflicts.
             Used by the ospfConfigError and
             ospfConfigVirtError traps.  When the last value
             of a trap using this object is needed, but no
             traps of that type have been sent, this value
             pertaining to this object should be returned as
             noError."
          ::= { ospfTrapControl 2 }

     ospfPacketType OBJECT-TYPE
          SYNTAX       INTEGER {
                          hello (1),
                          dbDescript (2),
                          lsReq (3),
                          lsUpdate (4),
                          lsAck (5),
                          nullPacket (6) }
          MAX-ACCESS   read-only
          STATUS       current
          DESCRIPTION
             "OSPF packet types.  When the last value of a trap
             using this object is needed, but no traps of
             that type have been sent, this value pertaining
             to this object should be returned as nullPacket."
          ::= { ospfTrapControl 3 }




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     ospfPacketSrc OBJECT-TYPE
          SYNTAX       IpAddress
          MAX-ACCESS   read-only
          STATUS       current
          DESCRIPTION
             "The IP address of an inbound packet that cannot
             be identified by a neighbor instance.  When
             the last value of a trap using this object is
             needed, but no traps of that type have been sent,
             this value pertaining to this object should
             be returned as 0.0.0.0."
          ::= { ospfTrapControl 4 }

   --  Traps

     ospfVirtIfStateChange NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfVirtIfAreaId,
             ospfVirtIfNeighbor,
             ospfVirtIfState  -- The new state
             }
          STATUS       current
          DESCRIPTION
             "An ospfVirtIfStateChange trap signifies that there
             has been a change in the state of an OSPF virtual
             interface.

             This trap should be generated when the interface
             state regresses (e.g., goes from Point-to-Point to Down)
             or progresses to a terminal state
             (i.e., Point-to-Point)."
          ::= { ospfTraps 1 }

     ospfNbrStateChange NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfNbrIpAddr,
             ospfNbrAddressLessIndex,
             ospfNbrRtrId,
             ospfNbrState  -- The new state
             }
          STATUS       current
          DESCRIPTION
             "An ospfNbrStateChange trap signifies that
             there has been a change in the state of a
             non-virtual OSPF neighbor.  This trap should be
             generated when the neighbor state regresses
             (e.g., goes from Attempt or Full to 1-Way or
             Down) or progresses to a terminal state (e.g.,



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             2-Way or Full).  When an neighbor transitions
             from or to Full on non-broadcast multi-access
             and broadcast networks, the trap should be
             generated by the designated router.  A designated
             router transitioning to Down will be noted by
             ospfIfStateChange."
          ::= { ospfTraps 2 }

     ospfVirtNbrStateChange NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfVirtNbrArea,
             ospfVirtNbrRtrId,
             ospfVirtNbrState  -- The new state
             }
          STATUS       current
          DESCRIPTION
             "An ospfVirtNbrStateChange trap signifies that there
             has been a change in the state of an OSPF virtual
             neighbor.  This trap should be generated
             when the neighbor state regresses (e.g., goes
             from Attempt or Full to 1-Way or Down) or
             progresses to a terminal state (e.g., Full)."
          ::= { ospfTraps 3 }

     ospfIfConfigError NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfIfIpAddress,
             ospfAddressLessIf,
             ospfPacketSrc,  -- The source IP address
             ospfConfigErrorType, -- Type of error
             ospfPacketType
             }
          STATUS       current
          DESCRIPTION
             "An ospfIfConfigError trap signifies that a
             packet has been received on a non-virtual
             interface from a router whose configuration
             parameters conflict with this router's
             configuration parameters.  Note that the event
             optionMismatch should cause a trap only if it
             prevents an adjacency from forming."
          ::= { ospfTraps 4 }

     ospfVirtIfConfigError NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfVirtIfAreaId,
             ospfVirtIfNeighbor,
             ospfConfigErrorType, -- Type of error



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             ospfPacketType
             }
          STATUS       current
          DESCRIPTION
             "An ospfVirtIfConfigError trap signifies that a
             packet has been received on a virtual interface
             from a router whose configuration parameters
             conflict with this router's configuration
             parameters.  Note that the event optionMismatch
             should cause a trap only if it prevents an
             adjacency from forming."
          ::= { ospfTraps 5 }

     ospfIfAuthFailure NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfIfIpAddress,
             ospfAddressLessIf,
             ospfPacketSrc,  -- The source IP address
             ospfConfigErrorType, -- authTypeMismatch or
                                  -- authFailure
             ospfPacketType
             }
          STATUS       current
          DESCRIPTION
             "An ospfIfAuthFailure trap signifies that a
             packet has been received on a non-virtual
             interface from a router whose authentication key
             or authentication type conflicts with this
             router's authentication key or authentication
             type."
          ::= { ospfTraps 6 }

     ospfVirtIfAuthFailure NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfVirtIfAreaId,
             ospfVirtIfNeighbor,
             ospfConfigErrorType, -- authTypeMismatch or
                                  -- authFailure
             ospfPacketType
             }
          STATUS       current
          DESCRIPTION
             "An ospfVirtIfAuthFailure trap signifies that a
             packet has been received on a virtual interface
             from a router whose authentication key or
             authentication type conflicts with this router's
             authentication key or authentication type."




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          ::= { ospfTraps 7 }

     ospfIfRxBadPacket NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfIfIpAddress,
             ospfAddressLessIf,
             ospfPacketSrc,  -- The source IP address
             ospfPacketType
             }
          STATUS       current
          DESCRIPTION
             "An ospfIfRxBadPacket trap signifies that an
             OSPF packet has been received on a non-virtual
             interface that cannot be parsed."
          ::= { ospfTraps 8 }

     ospfVirtIfRxBadPacket NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
            ospfVirtIfAreaId,
            ospfVirtIfNeighbor,
            ospfPacketType
            }
          STATUS       current
          DESCRIPTION
             "An ospfVirtIfRxBadPacket trap signifies that an OSPF
             packet has been received on a virtual interface
             that cannot be parsed."
          ::= { ospfTraps 9 }

     ospfTxRetransmit NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfIfIpAddress,
             ospfAddressLessIf,
             ospfNbrRtrId, -- Destination
             ospfPacketType,
             ospfLsdbType,
             ospfLsdbLsid,
             ospfLsdbRouterId
             }
           STATUS       current
           DESCRIPTION
              "An ospfTxRetransmit trap signifies than an
              OSPF packet has been retransmitted on a
              non-virtual interface.  All packets that may be
              retransmitted are associated with an LSDB entry.
              The LS type, LS ID, and Router ID are used to
              identify the LSDB entry."
           ::= { ospfTraps 10 }



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     ospfVirtIfTxRetransmit NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfVirtIfAreaId,
             ospfVirtIfNeighbor,
             ospfPacketType,
             ospfLsdbType,
             ospfLsdbLsid,
             ospfLsdbRouterId
             }
          STATUS       current
          DESCRIPTION
             "An ospfVirtIfTxRetransmit trap signifies than an
             OSPF packet has been retransmitted on a virtual
             interface.  All packets that may be retransmitted
             are associated with an LSDB entry.  The LS
             type, LS ID, and Router ID are used to identify
             the LSDB entry."
          ::= { ospfTraps 11 }

     ospfOriginateLsa NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfLsdbAreaId,  -- 0.0.0.0 for AS Externals
             ospfLsdbType,
             ospfLsdbLsid,
             ospfLsdbRouterId
             }
          STATUS       current
          DESCRIPTION
             "An ospfOriginateLsa trap signifies that a new
             LSA has been originated by this router.  This
             trap should not be invoked for simple refreshes
             of LSAs (which happens every 30 minutes), but
             instead will only be invoked when an LSA is
             (re)originated due to a topology change.
             Additionally, this trap does not include LSAs that
             are being flushed because they have reached
             MaxAge."
          ::= { ospfTraps 12 }

     ospfMaxAgeLsa NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfLsdbAreaId,  -- 0.0.0.0 for AS Externals
             ospfLsdbType,
             ospfLsdbLsid,
             ospfLsdbRouterId
             }
          STATUS       current
          DESCRIPTION



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             "An ospfMaxAgeLsa trap signifies that one of
             the LSAs in the router's link state database has
             aged to MaxAge."
          ::= { ospfTraps 13 }

     ospfLsdbOverflow NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfExtLsdbLimit
             }

          STATUS       current
          DESCRIPTION
             "An ospfLsdbOverflow trap signifies that the
             number of LSAs in the router's link state
             database has exceeded ospfExtLsdbLimit."
          ::= { ospfTraps 14 }

     ospfLsdbApproachingOverflow NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfExtLsdbLimit
             }
          STATUS       current
          DESCRIPTION
             "An ospfLsdbApproachingOverflow trap signifies
             that the number of LSAs in the router's
             link state database has exceeded ninety percent of
             ospfExtLsdbLimit."
          ::= { ospfTraps 15 }

     ospfIfStateChange NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
             ospfIfIpAddress,
             ospfAddressLessIf,
             ospfIfState   -- The new state
             }
          STATUS       current
          DESCRIPTION
             "An ospfIfStateChange trap signifies that there
             has been a change in the state of a non-virtual
             OSPF interface.  This trap should be generated
             when the interface state regresses (e.g., goes
             from Dr to Down) or progresses to a terminal
             state (i.e., Point-to-Point, DR Other, Dr, or
             Backup)."
          ::= { ospfTraps 16 }

     ospfNssaTranslatorStatusChange NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap



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             ospfAreaId,
             ospfAreaNssaTranslatorState -- The current translation
                                         -- status
             }
          STATUS       current
          DESCRIPTION
             "An ospfNssaTranslatorStatusChange trap indicates that
             there has been a change in the router's ability to
             translate OSPF type-7 LSAs into OSPF type-5 LSAs.
             This trap should be generated when the translator
             status transitions from or to any defined status on
             a per-area basis."
          ::= { ospfTraps 17 }

     ospfRestartStatusChange NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
                    ospfRestartStatus,
                    ospfRestartInterval,
                    ospfRestartExitReason
                  }
          STATUS       current
          DESCRIPTION
             "An ospfRestartStatusChange trap signifies that
             there has been a change in the graceful restart
             state for the router.  This trap should be
             generated when the router restart status
             changes."
          ::= { ospfTraps 18 }

     ospfNbrRestartHelperStatusChange NOTIFICATION-TYPE
          OBJECTS { ospfRouterId, -- The originator of the trap
                    ospfNbrIpAddr,
                    ospfNbrAddressLessIndex,
                    ospfNbrRtrId,
                    ospfNbrRestartHelperStatus,
                    ospfNbrRestartHelperAge,
                    ospfNbrRestartHelperExitReason
                  }
          STATUS       current
          DESCRIPTION
             "An ospfNbrRestartHelperStatusChange trap signifies that
             there has been a change in the graceful restart
             helper state for the neighbor.  This trap should be
             generated when the neighbor restart helper status
             transitions for a neighbor."
          ::= { ospfTraps 19 }

     ospfVirtNbrRestartHelperStatusChange NOTIFICATION-TYPE



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          OBJECTS { ospfRouterId, -- The originator of the trap
                    ospfVirtNbrArea,
                    ospfVirtNbrRtrId,
                    ospfVirtNbrRestartHelperStatus,
                    ospfVirtNbrRestartHelperAge,
                    ospfVirtNbrRestartHelperExitReason
                  }
          STATUS       current
          DESCRIPTION
             "An ospfVirtNbrRestartHelperStatusChange trap signifies
             that there has been a change in the graceful restart
             helper state for the virtual neighbor.  This trap should
             be generated when the virtual neighbor restart helper
             status transitions for a virtual neighbor."
          ::= { ospfTraps 20 }

   --  conformance information

   ospfTrapConformance OBJECT IDENTIFIER ::= { ospfTrap 3 }
   ospfTrapGroups      OBJECT IDENTIFIER ::= { ospfTrapConformance 1 }
   ospfTrapCompliances OBJECT IDENTIFIER ::= { ospfTrapConformance 2 }

   --  compliance statements

   ospfTrapCompliance MODULE-COMPLIANCE
        STATUS       obsolete
        DESCRIPTION
           "The compliance statement."
        MODULE       -- this module
        MANDATORY-GROUPS { ospfTrapControlGroup }

        GROUP       ospfTrapControlGroup
        DESCRIPTION
           "This group is optional but recommended for all
           OSPF systems."
        ::= { ospfTrapCompliances 1 }

   ospfTrapCompliance2 MODULE-COMPLIANCE
        STATUS       current
        DESCRIPTION
           "The compliance statement."
        MODULE       -- this module
        MANDATORY-GROUPS { ospfTrapControlGroup, ospfTrapEventGroup }
        OBJECT       ospfConfigErrorType
        MIN-ACCESS   accessible-for-notify
        DESCRIPTION
           "This object is only required to be supplied within
           notifications."



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        OBJECT       ospfPacketType
        MIN-ACCESS   accessible-for-notify
        DESCRIPTION
           "This object is only required to be supplied within
           notifications."
        OBJECT       ospfPacketSrc
        MIN-ACCESS   accessible-for-notify
        DESCRIPTION
           "This object is only required to be supplied within
           notifications."
        ::= { ospfTrapCompliances 2 }

   --  units of conformance

     ospfTrapControlGroup    OBJECT-GROUP
          OBJECTS { ospfSetTrap,
                    ospfConfigErrorType,
                    ospfPacketType,
                    ospfPacketSrc }
          STATUS       current
          DESCRIPTION
             "These objects are required to control traps
             from OSPF systems."
          ::= { ospfTrapGroups 1 }

     ospfTrapEventGroup       NOTIFICATION-GROUP
          NOTIFICATIONS {
             ospfVirtIfStateChange,
             ospfNbrStateChange,
             ospfVirtNbrStateChange,
             ospfIfConfigError,
             ospfVirtIfConfigError,
             ospfIfAuthFailure,
             ospfVirtIfAuthFailure,
             ospfIfRxBadPacket,
             ospfVirtIfRxBadPacket,
             ospfTxRetransmit,
             ospfVirtIfTxRetransmit,
             ospfOriginateLsa,
             ospfMaxAgeLsa,
             ospfLsdbOverflow,
             ospfLsdbApproachingOverflow,
             ospfIfStateChange,
             ospfNssaTranslatorStatusChange,
             ospfRestartStatusChange,
             ospfNbrRestartHelperStatusChange,
             ospfVirtNbrRestartHelperStatusChange
             }



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          STATUS        current
          DESCRIPTION
             "A grouping of OSPF trap events, as specified
             in NOTIFICATION-TYPE constructs."
          ::= { ospfTrapGroups 2 }

   END

6.  Security Considerations

   There are a number of management objects defined in this MIB that
   have a MAX-ACCESS clause of read-write and/or read-create.  Such
   objects may be considered sensitive or vulnerable in some network
   environments.  The support for SET operations in a non-secure
   environment without proper protection can have a negative effect on
   network operations.

   It is recommended that attention be specifically given to
   implementing the MAX-ACCESS clause in a number of objects, including
   ospfIfAuthKey, ospfIfAuthType, ospfVirtIfAuthKey, and
   ospfVirtIfAuthType in scenarios that DO NOT use SNMPv3 strong
   security (i.e., authentication and encryption).  Extreme caution must
   be used to minimize the risk of cascading security vulnerabilities
   when SNMPv3 strong security is not used.  When SNMPv3 strong security
   is not used, these objects should have access of read-only, not
   read-create.

   SNMPv1 by itself is not a secure environment.  Even if the network
   itself is secure (for example by using IPsec), even then, there is no
   control as to who on the secure network is allowed to access and
   GET/SET (read/change/create/delete) the objects in this MIB.

   It is recommended that the implementers consider the security
   features as provided by the SNMPv3 framework.  Specifically, the use
   of the User-based Security Model RFC 3414 [RFC3414] and the View-
   based Access Control Model RFC 3415 [RFC3415] is recommended.

   It is then a customer/user responsibility to ensure that the SNMP
   entity giving access to an instance of this MIB, is properly
   configured to give access to the objects only to those principals
   (users) that have legitimate rights to indeed GET or SET
   (change/create/delete) them.









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7.  IANA Considerations

   The MIB module in this document uses the following IANA-assigned
   OBJECT IDENTIFIER values recorded in the SMI Numbers registry:

   Descriptor        OBJECT IDENTIFIER value
   ----------        -----------------------
   ospf              { mib-2 14 }

8.  Acknowledgements

   This document was produced by the OSPF Working Group and is based on
   the MIB for OSPF version 2 by Rob Coltun and Fred Baker [RFC1850].
   The editors would like to acknowledge John Moy, Rob Coltun, Randall
   Atkinson, David T.  Perkins, Ken Chapman, Brian Field, Acee Lindem,
   Vishwas Manral, Roy Jose, Don Goodspeed, Vivek Dubey, Keith
   McCloghrie, Bill Fenner, and Dan Romascanu for their constructive
   comments.

9.  References

9.1.  Normative References

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119, March 1997.

   [RFC2578]  McCloghrie, K., Perkins, D., and J. Schoenwaelder,
              "Structure of Management Information Version 2 (SMIv2)",
              STD 58, RFC 2578, April 1999.

   [RFC2579]  McCloghrie, K., Perkins, D., and J. Schoenwaelder,
              "Textual Conventions for SMIv2", STD 58, RFC 2579, April
              1999.

   [RFC2580]  McCloghrie, K., Perkins, D., and J. Schoenwaelder,
              "Conformance Statements for SMIv2", STD 58, RFC 2580,
              April 1999.

9.2 Informative References

   [RFC1224]  Steinberg, L., "Techniques for managing asynchronously
              generated alerts", RFC 1224, May 1991.

   [RFC1704]  Haller, N.  and R. Atkinson, "On Internet Authentication",
              RFC 1704, October 1994.

   [RFC1765]  Moy, J., "OSPF Database Overflow", RFC 1765, March 1995.




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   [RFC1793]  Moy, J., "Extending OSPF to Support Demand Circuits", RFC
              1793, April 1995.

   [RFC1850]  Baker, F.  and R.  Coltun, "OSPF Version 2 Management
              Information Base", RFC 1850, November 1995.

   [RFC2328]  Moy, J., "OSPF Version 2", STD 54, RFC 2328, April 1998.

   [RFC2370]  Coltun, R., "The OSPF Opaque LSA Option", RFC 2370, July
              1998.

   [RFC3101]  Murphy, P., "The OSPF Not-So-Stubby Area (NSSA) Option",
              RFC 3101, January 2003.

   [RFC3410]  Case, J., Mundy, R., Partain, D., and B. Stewart,
              "Introduction and Applicability Statements for Internet-
              Standard Management Framework", RFC 3410, December 2002.

   [RFC3414]  Blumenthal, U.  and B. Wijnen, "User-based Security Model
              (USM) for version 3 of the Simple Network Management
              Protocol (SNMPv3)", STD 62, RFC 3414, December 2002.

   [RFC3415]  Wijnen, B., Presuhn, R., and K. McCloghrie, "View-based
              Access Control Model (VACM) for the Simple Network
              Management Protocol (SNMP)", STD 62, RFC 3415, December
              2002.

   [RFC3584]  Frye, R., Levi, D., Routhier, S., and B. Wijnen,
              "Coexistence between Version 1, Version 2, and Version 3
              of the Internet-standard Network Management Framework",
              BCP 74, RFC 3584, August 2003.

   [RFC3623]  Moy, J., Pillay-Esnault, P., and A. Lindem, "Graceful OSPF
              Restart", RFC 3623, November 2003.

   [RFC791]  Postel, J., "Internet Protocol", STD 5, RFC 791, September
              1981.

   [RFC3411]  Harrington, D., Presuhn, R., and B. Wijnen, "An
              Architecture for Describing Simple Network Management
              Protocol (SNMP) Management Frameworks", STD 62, RFC 3411,
              December 2002.

   [RFC1583]  Moy, J., "OSPF Version 2", RFC 1583, March 1994.







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Appendix A.  TOS Support

   For backward compatibility with previous versions of the OSPF MIB
   specification, TOS-specific information has been retained in this
   document, though the TOS routing option has been deleted from OSPF
   [RFC2328].

Appendix B.  Changes from RFC 1850

   This section documents the differences between this memo and RFC
   1850.

Appendix B.1.  General Group Changes

   Added object ospfRFC1583Compatibility to indicate support with "RFC
   1583 Compatibility" [RFC1583].  This object has DEFVAL of "enabled".

   Added object ospfReferenceBandwidth to allow configuration of a
   reference bandwidth for calculation of default interface metrics.

   Added objects ospfRestartSupport, ospfRestartInterval,
   ospfRestartAge, ospfRestartStrictLsaChecking, and
   ospfRestartExitReason to support graceful restart.

   Added objects ospfStubRouterSupport and ospfStubRouteAdvertisement to
   support stub routers.

   Added object ospfDiscontinuityTime in order for a management entity
   to detect counter discontinuity events.

Appendix B.2.  OSPF NSSA Enhancement Support

   Added new objects to OspfAreaTable including the following:

   -ospfAreaNssaTranslatorRole to indicate the configured NSSA
    translation role.

   -ospfAreaNssaTranslatorState to indicate the current NSSA translation
    role.

   -ospfAreaNssaTranslatorStabilityInterval to indicate time to continue
    to perform at current translation status.

   -ospfAreaNssaTranslatorEvents to indicate the number of times OSPF
    translation state has changed.

   Added new object ospfAreaAggregateExtRouteTag to
   ospfAreaAggregateTable.



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   Added new object ospfNssaTranslatorStatusChange to ospfTraps in
   OSPF-TRAP-MIB DEFINITIONS.

   Added ospfAreaId to IMPORTS in OSPF-TRAP-MIB DEFINITIONS to support
   ospfNssaTranslatorStatusChange.

   Added ospfAreaExtNssaTranslatorStatus to IMPORTS in OSPF-TRAP-MIB
   DEFINITIONS to support ospfNssaTranslatorStatusChange.

   Modified the DESCRIPTION clause of the ospfAreaSummary object in the
   ospfAreaTable to indicate support for NSSA.

   Modified the DESCRIPTION clause of the ospfImportAsExtern object in
   the ospfAreaTable for clarity.

Appendix B.3.  Opaque LSA Support

   Added object ospfOpaqueLsaSupport to ospfGeneralGroup to indicate
   support of OSPF Opaque LSAs.

   Created ospfLocalLsdbTable, for link-local (type-9) LSA support. This
   table is indexed by the following:

   -ospflocalLsdbIpAddress

   -ospfLocalLsdbAddressLessIf

   -ospfLocalLsdbType

   -ospfLocalLsdbLsid

   -ospfLocalLsdbRouterId

   ospfLocalLsdbTable contains the following (columnar) objects:

   -ospfLocalLsdbSequence, to indicate LSA instance

   -ospfLocalLsdbAge

   -ospfLocalLsdbChecksum

   -ospfLocalLsdbAdvertisement, containing the entire LSA

   Created ospfVirLocalLsdbTable, for link-local (type-9) LSA support on
   virtual links.  This table is indexed by the following:

   -ospfVirtLocalLsdbTransitArea




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   -ospfVirtLocalLsdbNeighbor, to indicate the router ID of the virtual
    neighbor

   -ospfVirLocalLsdbType

   -ospfVirLocalLsdbLsid

   -ospfVirLocalLsdbRouterId

   ospfVirLocalLsdbTable contains the following (columnar) objects:

   -ospfVirLocalLsdbSequence, to indicate LSA instance

   -ospfVirLocalLsdbAge

   -ospfVirLocalLsdbChecksum

   -ospfVirLocalLsdbAdvertisement, containing the entire LSA

   Added objects to ospfIfTable to support link-local (type-9) LSAs,
   including the following:

   -ospfIfLsaCount

   -ospfIfLsaCksumSum, to indicate the sum of the type-9 link state
    advertisement checksums on this interface

   Added objects to ospfVirIfTable, to support link-local (type-9) LSAs
   on virtual links, including the following:

   -ospfVirIfLsaCount

   -ospfVirIfLsaCksumSum, to indicate the sum of the type-9 link state
    advertisement checksums on this link

   To support area scope (type-10) LSAs, the enumeration areaOpaqueLink
   (10) was added to ospfLsdbType in the ospfLsdbTable.

   Created ospfAsLsdbTable, for AS-scope LSA support.  This table is
   indexed by the following:

   -ospfAsLsdbType

   -ospfAsLsdbLsid

   -ospfAsLsdbRouterId

   ospfAsLsdbTable contains the following (columnar) objects:



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   -ospfAsLsdbSequence, to indicate LSA instance

   -ospfAsLsdbAge

   -ospfAsLsdbChecksum

   -ospfAsLsdbAdvertisement, containing the entire LSA

Appendix B.4.  Graceful Restart Support

   Added objects ospfRestartSupport, ospfRestartInterval,
   ospfRestartAge, ospfRestartStrictLsaChecking, and
   ospfRestartExitReason to general group.

   Added objects ospfNbrRestartHelperStatus, ospfNbrRestartHelperAge,
   and ospfNbrRestartHelperExitReason to OspfNbrTable.

   Added objects ospfVirtNbrRestartHelperStatus,
   ospfVirtNbrRestartHelperAge, and ospfVirtNbrRestartHelperExitReason
   to OspfVirtNbrTable.

Appendix B.5.  OSPF Compliances

   New compliance statements were added for new and for obsoleted
   conformance groups.  These statements include the following:

   -ospfCompliance2

   -ospfComplianceObsolete

   New conformance groups were created to support new objects added to
   the group.  These groups include the following:

   -ospfBasicGroup2

   -ospfAreaGroup2

   -ospfIfGroup2

   -ospfVirtIfGroup2

   -ospfNbrGroup2

   -ospfVirtNbrGroup2

   -ospfAreaAggregateGroup2

   Added completely new conformance groups, including the following:



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   -ospfLocalLsdbGroup, which specifies support for link-local (type-9)
    LSAs

   -ospfVirtLocalLsdbGroup, which specifies support for link-local
    (type-9) LSAs on virtual links

   -ospfObsoleteGroup, for obsolete objects and SMI compatibility

Appendix B.6.  OSPF Authentication and Security

   As there has been significant concern in the community regarding
   cascading security vulnerabilities, the following changes have been
   incorporated:

   -Modified the DESCRIPTION clause of ospfIfAuthKey due to security
    concerns and to increase clarity

   -Modified the DESCRIPTION clause of ospfVirtIfAuthKey due to security
    concerns and to increase clarity

   -Modified the DESCRIPTION clause of ospfIfAuthType due to security
    concerns and to increase clarity

   -Modified the DESCRIPTION clause of ospfVirtIfType due to security
    concerns and to increase clarity

   -Modified the OSPF MIB MODULE DESCRIPTION due to security concerns
    and to include a reference to the Security Considerations section in
    this document that will transcend compilation

   -Modified the Security Considerations section to provide detail

Appendix B.7.  OSPF Trap MIB

   Added ospfTrapEventGroup.

   Added importation of NOTIFICATION-GROUP.

   Changed the STATUS of the ospfTrapCompliance MODULE-COMPLIANCE
   construct to obsolete.

   Added ospfTrapCompliance2 MODULE-COMPLIANCE construct, which replaces
   ospfTrapCompliance.  OspfTrapCompliance includes an updated
   MANDATORY-GROUPS clause and new MIN-ACCESS specifications.

   Added mtuMismatch enumeration to ospfConfigErrorType object in
   ospfTrapControl to imply MTU mismatch trap generation. in
   ospfIfConfigError.



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   Added noError enumeration to ospfConfigErrorType object for
   situations when traps are requested but none have been sent.  Updated
   the DESCRIPTION clause accordingly.

   Added nullPacket enumeration to ospfPacketType object for situations
   when traps are requested but none have been sent.  Updated the
   DESCRIPTION clause accordingly.

   Updated the DESCRIPTION clause of ospfPacketSrc for situations when
   traps are requested, but none have been sent.

   Added NOTIFICATION-TYPE for ospfRestartStatusChange.

   Added NOTIFICATION-TYPE for ospfNbrRestartHelperStatusChange.

   Added NOTIFICATION-TYPE for ospfVirtNbrRestartHelperStatusChange.

Appendix B.8.  Miscellaneous

   Various sections have been moved or modified for clarity. Most of
   these changes are semantic in nature and include, but are not limited
   to the following:

   -The OSPF overview section's format was revised.  Unneeded
    information was removed.  Removed information includes OSPF TOS
    default values.

   -The trap overview section's format and working were revised.
    Unneeded information was removed.

   -Modified the DESCRIPTION clause of "Status" "TEXTUAL-CONVENTION" for
    clarity.

   -The Updates section was moved from the overview to its own section.

   -Updated "REFERENCE" clauses in all objects, as needed.

   -Modified the SEQUENCE of the OspfIfTable to reflect the true order
    of the objects in the table.

   -Modified the DESCRIPTION clause of all row management objects for
    clarity.

   Added ospfHostCfgAreaID to object to Host table with read-create
   access.  Deprecated ospfHostAreaID.






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   Added importation of InterfaceIndexOrZero from IF-MIB.  This
   TEXTUAL-CONVENTION will replace the InterfaceIndex TEXTUAL-
   CONVENTION.

   Changed the SYNTAX clause of ospfNbrAddressLessIndex to use the
   semantically identical InterfaceIndexOrZero TEXTUAL-CONVENTION, as
   permitted by the SMI.

   Changed the STATUS clause of the TEXTUAL-CONVENTION InterfaceIndex to
   obsolete and modified the DESCRIPTION accordingly.

   Changed the SYNTAX clause of ospfAddressLessIf to use the
   semantically identical InterfaceIndexOrZero TEXTUAL-CONVENTION, as
   permitted by the SMI.

   Changed the SYNTAX clause of ospfIfMetricAddressLessIf to use the
   semantically identical InterfaceIndexOrZero TEXTUAL-CONVENTION, as
   permitted by the SMI.

   Changed importation of mib-2 from RFC1213-MIB to SNMPv2-SMI

   Added Intellectual Property Rights section.

   Updated REVISION DESCRIPTION clauses with description of major MIB
   modifications.

   Moved all relevant MIB comments to objects' DESCRIPTION clauses.

   Added reasoning for object deprecation.

   Added persistence information for read-write, read-create objects.

   Described conditions when columns can be modified in RowStatus
   managed rows as required by RFC 2579.

   Defined OspfAuthenticationType TC and modified authentication type
   objects to use the new type.

   Made index objects of new tables not accessible.

   Added the UNITS clause to several objects.

   Added ospfIfDesignatedRouterId and ospfIfBackupDesignatedRouterId to
   the OspfIfEntry.

   Added the area LSA counter table.

   Added IANA Considerations section.



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Authors' Addresses

   Dan Joyal (Editor)
   Nortel, Inc.
   600 Technology Park Drive
   Billerica, MA 01821
   USA

   EMail: djoyal@nortel.com


   Piotr Galecki (Editor)
   Airvana, Inc.
   19 Alpha Road
   Chelmsford, MA 01824
   USA

   EMail: pgalecki@airvana.com


   Spencer Giacalone (Editor)
   CSFB
   Eleven Madison Ave
   New York, NY 10010-3629
   USA

   EMail: spencer.giacalone@gmail.com


   Fred Baker
   Cisco Systems
   1121 Via Del Rey
   Santa Barbara, California  93117
   USA

   EMail: fred@cisco.com


   Rob Coltun
   Touch Acoustra
   3204 Brooklawn Terrace
   Chevy Chase, MD  20815
   USA

   EMail: undisclosed






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Full Copyright Statement

   Copyright (C) The IETF Trust (2006).

   This document is subject to the rights, licenses and restrictions
   contained in BCP 78, and except as set forth therein, the authors
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Acknowledgement

   Funding for the RFC Editor function is currently provided by the
   Internet Society.






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