path: root/doc/rfc/rfc3970.txt

Network Working Group                                        K. Kompella
Request for Comments: 3970                              Juniper Networks
Category: Standards Track                                   January 2005


                     A Traffic Engineering (TE) MIB

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 Internet Society (2005).

Abstract

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it describes managed objects for Traffic Engineered
   (TE) Tunnels; for example, Multi-Protocol Label Switched Paths.

Table of Contents

   1.  Introduction . . . . . . . . . . . . . . . . . . . . . . . . .  2
       1.1.  Specification of Requirements. . . . . . . . . . . . . .  2
   2.  The Internet-Standard Management Framework . . . . . . . . . .  2
   3.  Overview of the MIB Module . . . . . . . . . . . . . . . . . .  2
       3.1.  Traffic Engineering Information. . . . . . . . . . . . .  3
       3.2.  Traffic Tunnel Information . . . . . . . . . . . . . . .  3
       3.3.  Path Information . . . . . . . . . . . . . . . . . . . .  3
       3.4.  Hop Information. . . . . . . . . . . . . . . . . . . . .  4
       3.5.  Relationship with Other MIB Modules. . . . . . . . . . .  4
   4.  Creating, Modifying, and Deleting a TE Tunnel. . . . . . . . .  4
   5.  MIB Specification. . . . . . . . . . . . . . . . . . . . . . .  5
   6.  References . . . . . . . . . . . . . . . . . . . . . . . . . . 40
       6.1.  Normative References . . . . . . . . . . . . . . . . . . 40
       6.2.  Informative References . . . . . . . . . . . . . . . . . 40
   7.  Security Considerations. . . . . . . . . . . . . . . . . . . . 41
   Acknowledgments. . . . . . . . . . . . . . . . . . . . . . . . . . 42
   Author's Address . . . . . . . . . . . . . . . . . . . . . . . . . 43
   Full Copyright Statement . . . . . . . . . . . . . . . . . . . . . 44





Kompella                    Standards Track                     [Page 1]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


1.  Introduction

   This memo defines a portion of the Management Information Base (MIB)
   for use with network management protocols in the Internet community.
   In particular, it describes managed objects for Traffic Engineered
   (TE) Tunnels; for example, Multi-Protocol Label Switched Paths ([7],
   [8]).  The MIB module defined by this memo allows one to configure TE
   Tunnels, to assign one or more paths to a Tunnel, and to monitor
   operational aspects of the Tunnel, such as the number of octets and
   packets that have passed through the Tunnel.

   As it stands, this MIB module can only be used to configure or
   monitor a TE Tunnel at its ingress.  The ingress is then expected to
   use some protocol (such as RSVP-TE) to signal the other routers in
   the path the information they need to set up the tunnel.  The
   extension of this module for use at other points of a Tunnel is for
   further study.

1.1.  Specification of Requirements

   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 [1].

2.  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 [8].

   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 [2], STD 58, RFC 2579 [3] and STD 58, RFC 2580 [4].

3.  Overview of the MIB Module

   The Traffic Engineering MIB module consists of four parts:

      1) Traffic Engineering information,
      2) a table of Traffic Engineering Tunnels,
      3) a table of Paths that tunnels take, and
      4) a table of Hops that make up a tunnel path.

   The MIB module also has statements for minimal and full compliance.



Kompella                    Standards Track                     [Page 2]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   The following subsections give an overview of each part.  All objects
   are mandatory.  For minimal compliance, all objects MAY be
   implemented read-only; for full compliance, all objects must be
   implemented to their stated MAX-ACCESS capabilities.  Notifications
   are optional.

3.1.  Traffic Engineering Information

   This part contains information about the Link State Protocols used to
   carry TE information, the signaling protocols used to set up Traffic
   Tunnels, the number of Traffic Tunnels that have been configured and
   that are operational, and a mapping of Administrative Group (called
   Resource Classes in [7]) numbers to names.

3.2.  Traffic Tunnel Information

   This part contains a table of Traffic Tunnels and information about
   each one.  This information includes the Tunnel name, its
   configuration information, its operational information, and the
   active path(s) that the Tunnel takes.

   Configuration information includes the end points of the Traffic
   Tunnel, and the number of configured paths for the Traffic Tunnel.

   Operational information includes the current state (up/down), the
   count of octets and packets sent on the Traffic Tunnel, how long it
   has been up, and how many state transitions the Traffic Tunnel has
   had.

   Operational path information includes the number of operational
   paths, the number of path changes, and when the last path change was.

3.3.  Path Information

   A Tunnel is a logical entity.  An instantiation of a Tunnel is one or
   more Paths; each Path has a route (also called Explicit Route) or
   sequence of hops.  A Path is indexed by a dual index: The primary
   index is that of the Tunnel to which the Path belongs; the secondary
   index is that of the Path itself.

   The configured information for a Path consists of the constraints for
   the Path and a configured route.

   The operational information consists of the Path status, the computed
   route (i.e., the route that was computed to satisfy the constraints),
   and the actual path as recorded by the signaling protocol.





Kompella                    Standards Track                     [Page 3]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


3.4.  Hop Information

   A path consists of a sequence of hops.  A hop can be loose (meaning
   that the path eventually traverses the specified node) or strict
   (meaning that the specified node and possibly the link must be the
   next node in the path).  A hop can be specified as an IPv4 address,
   an IPv6 address, an Autonomous System number or an unnumbered
   interface index [5].

   The Hop Table contains all hops for all paths on a given router.  It
   is organized as follows.  There is a primary index that identifies a
   list of hops and a secondary index that identifies individual hops.
   Thus, to get the sequence of recorded hops for a path, one looks up
   the path's tePathRecordedRoute, which is a primary index into the Hop
   Table.  Then to get the list of actual hops in order for the recorded
   path, one uses a secondary index of 1, 2, ....

3.5.  Relationship with Other MIB Modules

   A TE Tunnel can extend objects from two other MIB modules; one is the
   Interfaces MIB [10], and the other is the IP Tunnel MIB [11].  The
   mechanism for doing so is to assign the TE Tunnel index
   (teTunnelIndex) with a valid ifIndex value in ifTable.

   If a TE Tunnel is deemed an interface, a new interface object is
   created and assigned an ifIndex value in ifTable.  Then a TE Tunnel
   object is created, setting teTunnelIndex to the same value as the
   interface index.

   If (and only if) a TE Tunnel is considered an interface, it may also
   be considered an IP tunnel (if the encapsulation of the TE Tunnel is
   IP).  In that case, the interface associated with the TE Tunnel
   should have its ifType set to tunnel(131).

   If a TE Tunnel is not considered an interface, then the TE Tunnel
   index (teTunnelIndex) SHOULD be set to a value at least 2^24, so that
   it is distinct from normal interfaces.

4.  Creating, Modifying, and Deleting a TE Tunnel

   To create a TE Tunnel, one first obtains a free Tunnel index by using
   the object teNextTunnelIndex.  One then creates the Tunnel, including
   all parameters, either as createAndGo or createAndWait.  Then, TE
   Paths for this Tunnel can be created by using the
   teTunnelNextPathIndex object, again as createAndGo or createAndWait.
   A particular Path is computed and signaled when both the Path and the
   enclosing Tunnel have RowStatus 'active'.




Kompella                    Standards Track                     [Page 4]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   To build a Path's configured route, one first gets a free PathHop
   index by using teNextPathHopIndex, and then builds the route hop-by-
   hop using the secondary index, setting the AddrType, Address, and
   HopType for each Hop.  Finally, one sets the tePathConfiguredRoute in
   the Path to the PathHop index obtained.

   Modifying certain properties of a TE Tunnel or a TE Path may require
   setting the RowStatus of the Tunnel (or Path) to 'notInService'
   before making the changes and then setting the RowStatus of the
   Tunnel (or Path) back to 'active' to re-signal all Paths of the
   Tunnel (or the modified Path).

   A TE Tunnel and all its Paths can be deleted by setting the Tunnel's
   RowStatus to 'destroy'.  A specific Path within a Tunnel can be
   destroyed by setting that Path's RowStatus to 'destroy'.

5.  MIB Specification

   This MIB module IMPORTs objects from RFCs 2578 [2], 2579 [3], 2580
   [3], 3411 [6], and 3811 [5] and it also has REFERENCE clauses to RFCs
   3209 [8] and 3212 [12].

   TE-MIB DEFINITIONS ::= BEGIN

   IMPORTS
       MODULE-IDENTITY, OBJECT-TYPE,
       NOTIFICATION-TYPE, mib-2,
       Integer32, Gauge32, Counter32,
       Counter64, Unsigned32, TimeTicks     FROM SNMPv2-SMI

       RowStatus, StorageType, TimeStamp,
       TruthValue                           FROM SNMPv2-TC

       SnmpAdminString                      FROM SNMP-FRAMEWORK-MIB

       MODULE-COMPLIANCE, OBJECT-GROUP,
       NOTIFICATION-GROUP                   FROM SNMPv2-CONF

       TeHopAddress, TeHopAddressType,
       MplsBitRate                          FROM MPLS-TC-STD-MIB;

   teMIB MODULE-IDENTITY
       LAST-UPDATED "200501040000Z"         -- 01 January 2005
       ORGANIZATION "IETF Traffic Engineering Working Group"
       CONTACT-INFO "
                     Editor:         Kireeti Kompella
                             Postal: Juniper Networks, Inc.
                                     1194 Mathilda Ave



Kompella                    Standards Track                     [Page 5]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                                     Sunnyvale, CA 94089
                             Tel:    +1 408 745 2000
                             E-mail: kireeti@juniper.net

                     The IETF Traffic Engineering Working Group is
                     chaired by Jim Boyle and Ed Kern.

                     WG Mailing List information:

                       General Discussion: te-wg@ops.ietf.org
                         To Subscribe:     te-wg-request@ops.ietf.org
                            In Body:       subscribe
                         Archive:          ftp://ops.ietf.org/pub/lists

                     Comments on the MIB module should be sent to the
                     mailing list.  The archives for this mailing list
                     should be consulted for previous discussion on
                     this MIB.
                    "
       DESCRIPTION  "The Traffic Engineering MIB module.

                     Copyright (C) The Internet Society (2005).  This
                     version of this MIB module is part of RFC 3970;
                     see the RFC itself for full legal notices.
                    "

       -- revision history

       REVISION     "200501040000Z"         -- 01 January 2005
       DESCRIPTION  "Initial version, published as RFC 3970."
       ::= { mib-2 122 }

   -- Top level objects

   teMIBNotifications  OBJECT IDENTIFIER ::= { teMIB 0 }
   teMIBObjects        OBJECT IDENTIFIER ::= { teMIB 1 }
   teMIBConformance    OBJECT IDENTIFIER ::= { teMIB 2 }

   -- ****************************************************************
   --
   -- TE MIB Objects
   --

   -- TE Info

   teInfo OBJECT IDENTIFIER ::= { teMIBObjects 1 }

   teDistProtocol   OBJECT-TYPE



Kompella                    Standards Track                     [Page 6]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


       SYNTAX       BITS {
                        other(0),
                        isis(1),
                        ospf(2)
                    }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "IGP used to distribute Traffic Engineering
                    information and topology to each device for the
                    purpose of automatic path computation.  More than
                    one IGP may be used to distribute TE information.
                   "
       ::= { teInfo 1 }

   teSignalingProto OBJECT-TYPE
       SYNTAX       BITS {
                        other(0),
                        rsvpte(1),
                        crldp(2),
                        static(3)    -- static configuration
                    }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "Traffic Engineering signaling protocols supported
                    by this device.  More than one protocol may be
                    supported.
                   "
       REFERENCE   "For a description of RSVP-TE, see RFC 3209;
                    for CR-LDP, see RFC 3212.
                   "
       ::= { teInfo 2 }

   teNotificationEnable OBJECT-TYPE
       SYNTAX       TruthValue
       MAX-ACCESS   read-write
       STATUS       current
       DESCRIPTION "If this object is true, then it enables the
                    generation of notifications from this MIB module.
                    Otherwise notifications are not generated.
                   "
       DEFVAL { false }
       ::= { teInfo 3 }

   teNextTunnelIndex OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "An integer that may be used as a new Index in the



Kompella                    Standards Track                     [Page 7]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    teTunnelTable.

                    The special value of 0 indicates that no more new
                    entries can be created in that table.

                    When this MIB module is used for configuration, this
                    object always contains a legal value (if non-zero)
                    for an index that is not currently used in that
                    table.  The Command Generator (Network Management
                    Application) reads this variable and uses the
                    (non-zero) value read when creating a new row with
                    an SNMP SET.  When the SET is performed, the Command
                    Responder (agent) must determine whether the value
                    is indeed still unused; Two Network Management
                    Applications may attempt to create a row
                    (configuration entry) simultaneously and use the
                    same value.  If it is currently unused, the SET
                    succeeds, and the Command Responder (agent) changes
                    the value of this object according to an
                    implementation-specific algorithm.  If the value is
                    in use, however, the SET fails.  The Network
                    Management Application must then re-read this
                    variable to obtain a new usable value.
                   "
       ::= { teInfo 4 }

   teNextPathHopIndex OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "An integer that may be used as a new Index in the
                    tePathHopTable.

                    The special value of 0 indicates that no more new
                    entries can be created in that table.

                    When this MIB module is used for configuration, this
                    object always contains a legal value (if non-zero)
                    for an index that is not currently used in that
                    table.  The Command Generator (Network Management
                    Application) reads this variable and uses the
                    (non-zero) value read when creating a new row with
                    an SNMP SET.  When the SET is performed, the Command
                    Responder (agent) must determine whether the value
                    is indeed still unused; Two Network Management
                    Applications may attempt to create a row
                    (configuration entry) simultaneously and use the
                    same value.  If it is currently unused, the SET



Kompella                    Standards Track                     [Page 8]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    succeeds, and the Command Responder (agent) changes
                    the value of this object according to an
                    implementation-specific algorithm.  If the value is
                    in use, however, the SET fails.  The Network
                    Management Application must then re-read this
                    variable to obtain a new usable value.
                   "
       ::= { teInfo 5 }

   teConfiguredTunnels OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "Number of currently configured Tunnels."
       ::= { teInfo 6 }

   teActiveTunnels  OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "Number of currently active Tunnels."
       ::= { teInfo 7 }

   tePrimaryTunnels OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "Number of currently active Tunnels running on
                    their primary paths.
                   "
       ::= { teInfo 8 }

   teAdminGroupTable OBJECT-TYPE
       SYNTAX       SEQUENCE OF TeAdminGroupEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "A mapping of configured administrative groups.  Each
                    entry represents an Administrative Group and
                    provides a name and index for the group.
                    Administrative groups are used to label links in the
                    Traffic Engineering topology in order to place
                    constraints (include and exclude) on Tunnel paths.

                    A groupName can only be linked to one group number.
                    The groupNumber is the number assigned to the
                    administrative group used in constraints,
                    such as tePathIncludeAny or tePathIncludeAll.
                   "



Kompella                    Standards Track                     [Page 9]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


       ::= { teInfo 9 }

   teAdminGroupEntry OBJECT-TYPE
       SYNTAX       TeAdminGroupEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "A mapping between a configured group number and
                    its human-readable name.  The group number should
                    be between 1 and 32, inclusive.  Group number n
                    represents bit number (n-1) in the bit vector for
                    Include/Exclude constraints.

                    All entries in this table MUST be kept in stable
                    storage so that they will re-appear in case of a
                    restart/reboot.
                   "
       INDEX       { teAdminGroupNumber }
       ::= { teAdminGroupTable 1 }

   TeAdminGroupEntry ::=
       SEQUENCE {
           teAdminGroupNumber    Integer32,
           teAdminGroupName      SnmpAdminString,
           teAdminGroupRowStatus RowStatus
       }

   teAdminGroupNumber OBJECT-TYPE
       SYNTAX       Integer32 (1..32)
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "Index of the administrative group."
       ::= { teAdminGroupEntry 1 }

   teAdminGroupName OBJECT-TYPE
       SYNTAX       SnmpAdminString (SIZE (1..32))
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "Name of the administrative group."
       ::= { teAdminGroupEntry 2 }

   teAdminGroupRowStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The status of this conceptual row.

                    The value of this object has no effect on whether
                    other objects in this conceptual row can be



Kompella                    Standards Track                    [Page 10]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    modified.
                   "
       ::= { teAdminGroupEntry 3 }

   -- Tunnel Table

   teTunnelTable    OBJECT-TYPE
       SYNTAX       SEQUENCE OF TeTunnelEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "Table of Configured Traffic Tunnels."
       ::= { teMIBObjects 2 }

   teTunnelEntry    OBJECT-TYPE
       SYNTAX       TeTunnelEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "Entry containing information about a particular
                    Traffic Tunnel.
                   "
       INDEX       { teTunnelIndex }
       ::= { teTunnelTable 1 }

   TeTunnelEntry ::=
       SEQUENCE {
           teTunnelIndex                   Unsigned32,
           teTunnelName                    SnmpAdminString,
           teTunnelNextPathIndex           Unsigned32,
        -- Conceptual row information:
           teTunnelRowStatus               RowStatus,
           teTunnelStorageType             StorageType,
        -- Address information:
           teTunnelSourceAddressType       TeHopAddressType,
           teTunnelSourceAddress           TeHopAddress,
           teTunnelDestinationAddressType  TeHopAddressType,
           teTunnelDestinationAddress      TeHopAddress,
        -- State/performance information:
           teTunnelState                   INTEGER,
           teTunnelDiscontinuityTimer      TimeStamp,
           teTunnelOctets                  Counter64,
           teTunnelPackets                 Counter64,
           teTunnelLPOctets                Counter32,
           teTunnelLPPackets               Counter32,
           teTunnelAge                     TimeTicks,
           teTunnelTimeUp                  TimeTicks,
           teTunnelPrimaryTimeUp           TimeTicks,
           teTunnelTransitions             Counter32,
           teTunnelLastTransition          TimeTicks,



Kompella                    Standards Track                    [Page 11]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


           teTunnelPathChanges             Counter32,
           teTunnelLastPathChange          TimeTicks,
           teTunnelConfiguredPaths         Gauge32,
           teTunnelStandbyPaths            Gauge32,
           teTunnelOperationalPaths        Gauge32
       }

   teTunnelIndex    OBJECT-TYPE
       SYNTAX       Unsigned32 (1..4294967295)
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "A unique index that identifies a Tunnel.  If the TE
                    Tunnel is considered an interface, then this index
                    must match the interface index of the corresponding
                    interface.  Otherwise, this index must be at least
                    2^24, so that it does not overlap with any existing
                    interface index.
                   "
       ::= { teTunnelEntry 1 }

   teTunnelName     OBJECT-TYPE
       SYNTAX       SnmpAdminString (SIZE (1..32))
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "Name of the Traffic Tunnel.

                    Note that the name of a Tunnel MUST be unique.
                    When a SET request contains a name that is already
                    in use for another entry, then the implementation
                    must return an inconsistentValue error.

                    The value of this object cannot be changed if the
                    if the value of the corresponding teTunnelRowStatus
                    object is 'active'.
                   "
       ::= { teTunnelEntry 2 }

   teTunnelNextPathIndex  OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "An integer that may be used as a new Index for the
                    next Path in this Tunnel.

                    The special value of 0 indicates that no more Paths
                    can be created for this Tunnel, or that no more new
                    entries can be created in tePathTable.




Kompella                    Standards Track                    [Page 12]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    When this MIB module is used for configuration, this
                    object always contains a legal value (if non-zero)
                    for an index that is not currently used in that
                    table.  The Command Generator (Network Management
                    Application) reads this variable and uses the
                    (non-zero) value read when creating a new row with
                    an SNMP SET.  When the SET is performed, the Command
                    Responder (agent) must determine whether the value
                    is indeed still unused; Two Network Management
                    Applications may attempt to create a row
                    (configuration entry) simultaneously and use the
                    same value.  If it is currently unused, the SET
                    succeeds, and the Command Responder (agent) changes
                    the value of this object according to an
                    implementation-specific algorithm.  If the value is
                    in use, however, the SET fails.  The Network
                    Management Application must then re-read this
                    variable to obtain a new usable value.
                   "
       ::= { teTunnelEntry 3 }

   teTunnelRowStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The status of this conceptual row.

                    When the value of this object is 'active', then
                    the values for the corresponding objects
                    teTunnelName, teTunnelSourceAddressType,
                    teTunnelSourceAddress,
                    teTunnelDestinationAddressType, and
                    teTunnelDestinationAddress cannot be changed.
                   "
       ::= { teTunnelEntry 4 }

   teTunnelStorageType OBJECT-TYPE
       SYNTAX       StorageType
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The storage type for this conceptual row.

                    Conceptual rows having the value 'permanent' need
                    not allow write-access to any columnar objects
                    in the row.
                   "
       ::= { teTunnelEntry 5 }




Kompella                    Standards Track                    [Page 13]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   teTunnelSourceAddressType OBJECT-TYPE
       SYNTAX       TeHopAddressType
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The type of Traffic Engineered Tunnel hop address
                    for the source of this Tunnel.  Typically, this
                    address type is IPv4 or IPv6, with a prefix length
                    of 32 or 128, respectively.  If the TE Tunnel path
                    is being computed by a path computation server,
                    however, it is possible to use more flexible source
                    address types, such as AS numbers or prefix lengths
                    less than host address lengths.

                    The value of this object cannot be changed
                    if the value of the corresponding teTunnelRowStatus
                    object is 'active'.
                   "
       ::= { teTunnelEntry 6 }

   teTunnelSourceAddress OBJECT-TYPE
       SYNTAX       TeHopAddress
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The Source Traffic Engineered Tunnel hop address of
                    this Tunnel.

                    The type of this address is determined by the value
                    of the corresponding teTunnelSourceAddressType.

                    Note that the source and destination addresses of a
                    Tunnel can be different address types.

                    The value of this object cannot be changed
                    if the value of the corresponding teTunnelRowStatus
                    object is 'active'.
                   "
       ::= { teTunnelEntry 7 }

   teTunnelDestinationAddressType OBJECT-TYPE
       SYNTAX       TeHopAddressType
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The type of Traffic Engineered Tunnel hop address
                    for the destination of this Tunnel.

                    The value of this object cannot be changed
                    if the value of the corresponding teTunnelRowStatus
                    object is 'active'.



Kompella                    Standards Track                    [Page 14]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                   "
       ::= { teTunnelEntry 8 }

   teTunnelDestinationAddress OBJECT-TYPE
       SYNTAX       TeHopAddress
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The Destination Traffic Engineered Tunnel hop
                    address of this Tunnel.

                    The type of this address is determined by the value
                    of the corresponding teTunnelDestinationAddressType.

                    Note that source and destination addresses of a
                    Tunnel can be different address types.

                    The value of this object cannot be changed
                    if the value of the corresponding teTunnelRowStatus
                    object is 'active'.
                   "
       ::= { teTunnelEntry 9 }

   teTunnelState    OBJECT-TYPE
       SYNTAX       INTEGER {
                        unknown(1),
                        up(2),
                        down(3),
                        testing(4)
                    }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The operational state of the Tunnel."
       ::= { teTunnelEntry 10 }

   teTunnelDiscontinuityTimer OBJECT-TYPE
       SYNTAX       TimeStamp
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The value of sysUpTime on the most recent occasion
                    at which any one or more of this tunnel's counters
                    suffered a discontinuity.  The relevant counters
                    are teTunnelOctets, teTunnelPackets,
                    teTunnelLPOctets, and teTunnelLPPackets.  If no such
                    discontinuities have occurred since the last
                    re-initialization of the local management subsystem
                    then this object contains a zero value.
                   "
       ::= { teTunnelEntry 11 }



Kompella                    Standards Track                    [Page 15]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   teTunnelOctets   OBJECT-TYPE
       SYNTAX       Counter64
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of octets that have been forwarded over
                    the Tunnel.

                    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
                    teTunnelDiscontinuityTimer.
                   "
       ::= { teTunnelEntry 12 }

   teTunnelPackets  OBJECT-TYPE
       SYNTAX       Counter64
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of packets that have been forwarded over
                    the Tunnel.

                    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
                    teTunnelDiscontinuityTimer.
                   "
       ::= { teTunnelEntry 13 }

   teTunnelLPOctets OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of octets that have been forwarded over
                    the Tunnel.

                    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
                    teTunnelDiscontinuityTimer.
                   "
       ::= { teTunnelEntry 14 }

   teTunnelLPPackets OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of packets that have been forwarded over
                    the Tunnel.



Kompella                    Standards Track                    [Page 16]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    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
                    teTunnelDiscontinuityTimer.
                   "
       ::= { teTunnelEntry 15 }

   teTunnelAge      OBJECT-TYPE
       SYNTAX       TimeTicks
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The age (i.e., time from creation of this conceptual
                    row till now) of this Tunnel in hundredths of a
                    second.  Note that because TimeTicks wrap in about
                    16 months, this value is best used in interval
                    measurements.
                   "
       ::= { teTunnelEntry 16 }

   teTunnelTimeUp   OBJECT-TYPE
       SYNTAX       TimeTicks
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The total time in hundredths of a second that this
                    Tunnel has been operational.  Note that because
                    TimeTicks wrap in about 16 months, this value is
                    best used in interval measurements.

                    An example of usage of this object would be to
                    compute the percentage up time over a period of time
                    by obtaining values of teTunnelAge and
                    teTunnelTimeUp at two points in time and computing
                    the following ratio:
                    ((teTunnelTimeUp2 - teTunnelTimeUp1)/
                    (teTunnelAge2 - teTunnelAge1)) * 100 %.  In doing
                    so, the management station must account for
                    wrapping of the values of teTunnelAge and
                    teTunnelTimeUp between the two measurements.
                   "
       ::= { teTunnelEntry 17 }

   teTunnelPrimaryTimeUp OBJECT-TYPE
       SYNTAX       TimeTicks
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The total time in hundredths of a second that this
                    Tunnel's primary path has been operational.  Note
                    that because TimeTicks wrap in about 16 months, this



Kompella                    Standards Track                    [Page 17]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    value is best used in interval measurements.

                    An example of usage of this field would be to
                    compute what percentage of time that a TE Tunnel was
                    on the primary path over a period of time by
                    computing
                    ((teTunnelPrimaryTimeUp2 - teTunnelPrimaryTimeUp1)/
                    (teTunnelTimeUp2 - teTunnelTimeUp1))*100 %.  In
                    doing so, the management station must account for
                    wrapping of the values of teTunnelPrimaryTimeUp and
                    teTunnelTimeUp between the two measurements.
                   "
       ::= { teTunnelEntry 18 }

   teTunnelTransitions OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of operational state transitions
                    (up -> down and down -> up) this Tunnel has
                    undergone.
                   "
       ::= { teTunnelEntry 19 }

   teTunnelLastTransition OBJECT-TYPE
       SYNTAX       TimeTicks
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The time in hundredths of a second since the last
                    operational state transition occurred on this
                    Tunnel.

                    Note that if the last transition was over 16
                    months ago, this value will be inaccurate.
                   "
       ::= { teTunnelEntry 20 }

   teTunnelPathChanges OBJECT-TYPE
       SYNTAX       Counter32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of path changes this Tunnel has had."
       ::= { teTunnelEntry 21 }

   teTunnelLastPathChange OBJECT-TYPE
       SYNTAX       TimeTicks
       MAX-ACCESS   read-only
       STATUS       current



Kompella                    Standards Track                    [Page 18]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


       DESCRIPTION "The time in hundredths of a second since the last
                    path change occurred on this Tunnel.

                    Note that if the last transition was over 16
                    months ago, this value will be inaccurate.

                    Path changes may be caused by network events or by
                    reconfiguration that affects the path.
                   "
       ::= { teTunnelEntry 22 }

   teTunnelConfiguredPaths OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of paths configured for this Tunnel."
       ::= { teTunnelEntry 23 }

   teTunnelStandbyPaths OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of standby paths configured for this
                    Tunnel.
                   "
       ::= { teTunnelEntry 24 }

   teTunnelOperationalPaths OBJECT-TYPE
       SYNTAX       Gauge32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The number of operational paths for this Tunnel.
                    This includes the path currently active, as
                    well as operational standby paths.
                   "
       ::= { teTunnelEntry 25 }

   -- ****************************************************************
   --
   -- Tunnel Path Table
   --

   tePathTable      OBJECT-TYPE
       SYNTAX       SEQUENCE OF TePathEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "Table of Configured Traffic Tunnels."
       ::= { teMIBObjects 3 }



Kompella                    Standards Track                    [Page 19]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   tePathEntry      OBJECT-TYPE
       SYNTAX       TePathEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "Entry containing information about a particular
                    Traffic Tunnel.  Each Traffic Tunnel can have zero
                    or more Traffic Paths.

                    As a Traffic Path can only exist over an existing
                    Traffic Tunnel, all tePathEntries with
                    a value of n for teTunnelIndex MUST be removed by
                    the implementation when the corresponding
                    teTunnelEntry with a value of n for teTunnelIndex
                    is removed.
                   "
       INDEX       { teTunnelIndex, tePathIndex }
       ::= { tePathTable 1 }

   TePathEntry ::=
       SEQUENCE {
           tePathIndex                Unsigned32,
           tePathName                 SnmpAdminString,
        -- Conceptual row information
           tePathRowStatus            RowStatus,
           tePathStorageType          StorageType,
        -- Path properties
           tePathType                 INTEGER,
           tePathConfiguredRoute      Unsigned32,
           tePathBandwidth            MplsBitRate,
           tePathIncludeAny           Unsigned32,
           tePathIncludeAll           Unsigned32,
           tePathExclude              Unsigned32,
           tePathSetupPriority        Integer32,
           tePathHoldPriority         Integer32,
           tePathProperties           BITS,
        -- Path status
           tePathOperStatus           INTEGER,
           tePathAdminStatus          INTEGER,
           tePathComputedRoute        Unsigned32,
           tePathRecordedRoute        Unsigned32
       }

   tePathIndex      OBJECT-TYPE
       SYNTAX       Unsigned32 (1..4294967295)
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "An index that uniquely identifies a path within
                    a Tunnel.



Kompella                    Standards Track                    [Page 20]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    The combination of <teTunnelIndex, tePathIndex> thus
                    uniquely identifies a path among all paths on this
                    router.
                   "
       ::= { tePathEntry 1 }

   tePathName       OBJECT-TYPE
       SYNTAX       SnmpAdminString (SIZE(0..32))
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The name of this path.

                    A pathName must be unique within the set of paths
                    over a single tunnel.  If a SET request is received
                    with a duplicate name, then the implementation MUST
                    return an inconsistentValue error.

                    The value of this object cannot be changed
                    if the value of the corresponding teTunnelRowStatus
                    object is 'active'.
                   "
       ::= { tePathEntry 2 }

   tePathRowStatus  OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The status of this conceptual row.

                    When the value of this object is 'active', then
                    the value of tePathName cannot be changed.  All
                    other writable objects may be changed; however,
                    these changes may affect traffic going over the TE
                    tunnel or require the path to be computed and/or
                    re-signaled.
                   "
       ::= { tePathEntry 3 }

   tePathStorageType OBJECT-TYPE
       SYNTAX       StorageType
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The storage type for this conceptual row.

                    Conceptual rows having the value 'permanent' need
                    not allow write-access to any columnar objects
                    in the row.
                   "



Kompella                    Standards Track                    [Page 21]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


       ::= { tePathEntry 4 }

   tePathType OBJECT-TYPE
       SYNTAX       INTEGER {
                        other(1),
                        primary(2),
                        standby(3),
                        secondary(4)
                    }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The type for this PathEntry; i.e., whether this path
                    is a primary path, a standby path, or a secondary
                    path.
                   "
       ::= { tePathEntry 5 }

   tePathConfiguredRoute OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The route that this TE path is configured to follow;
                    i.e., an ordered list of hops.  The value of this
                    object gives the primary index into the Hop Table.
                    The secondary index is the hop count in the path, so
                    to get the route, one could get the first hop with
                    index <tePathConfiguredRoute, 1> in the Hop Table
                    and do a getnext to get subsequent hops.
                   "
       ::= { tePathEntry 6 }

   tePathBandwidth  OBJECT-TYPE
       SYNTAX       MplsBitRate
       UNITS       "Kilobits per second"
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The configured bandwidth for this Tunnel,
                    in units of thousands of bits per second (Kbps).
                   "
       DEFVAL      { 0 }
       ::= { tePathEntry 7 }

   tePathIncludeAny OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "This is a configured set of administrative groups
                    specified as a bit vector (i.e., bit n is 1 if group



Kompella                    Standards Track                    [Page 22]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    n is in the set, where n = 0 is the LSB).  For each
                    link that this path goes through, the link must have
                    at least one of the groups specified in IncludeAny
                    to be acceptable.  If IncludeAny is zero, all links
                    are acceptable.
                   "
       DEFVAL      { 0 }
       ::= { tePathEntry 8 }

   tePathIncludeAll OBJECT-TYPE

       SYNTAX       Unsigned32
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "This is a configured set of administrative groups
                    specified as a bit vector (i.e., bit n is 1 if group
                    n is in the set, where n = 0 is the LSB).  For each
                    link that this path goes through, the link must have
                    all of the groups specified in IncludeAll to be
                    acceptable.  If IncludeAll is zero, all links are
                    acceptable.
                   "
       DEFVAL      { 0 }
       ::= { tePathEntry 9 }

   tePathExclude    OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "This is a configured set of administrative groups
                    specified as a bit vector (i.e., bit n is 1 if group
                    n is in the set, where n = 0 is the LSB).  For each
                    link that this path goes through, the link MUST have
                    groups associated with it, and the intersection of
                    the link's groups and the 'exclude' set MUST be
                    null.
                   "
       DEFVAL      { 0 }
       ::= { tePathEntry 10 }

   tePathSetupPriority OBJECT-TYPE
       SYNTAX       Integer32 (0..7)
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The setup priority configured for this path, with 0
                    as the highest priority and 7 as the lowest.
                   "
       DEFVAL      { 7 }



Kompella                    Standards Track                    [Page 23]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


       ::= { tePathEntry 11 }

   tePathHoldPriority OBJECT-TYPE
       SYNTAX       Integer32 (0..7)
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The hold priority configured for this path, with 0
                    as the highest priority and 7 as the lowest.
                   "
       DEFVAL      { 0 }
       ::= { tePathEntry 12 }

   tePathProperties OBJECT-TYPE
       SYNTAX       BITS {
                        recordRoute(0),
                        cspf(1),
                        makeBeforeBreak(2),
                        mergeable(3),
                        fastReroute(4),
                        protected(5)
                    }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The set of configured properties for this path,
                    expressed as a bit map.  For example, if the path
                    supports 'make before break', then bit 2 is set.
                   "
       ::= { tePathEntry 13 }

   tePathOperStatus OBJECT-TYPE
       SYNTAX       INTEGER {
                        unknown(0),
                        down(1),
                        testing(2),
                        dormant(3),
                        ready(4),
                        operational(5)
                    }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The operational status of the path:
                    unknown:
                    down:        Signaling failed.
                    testing:     Administratively set aside for testing.
                    dormant:     Not signaled (for a backup tunnel).
                    ready:       Signaled but not yet carrying traffic.
                    operational: Signaled and carrying traffic.
                   "



Kompella                    Standards Track                    [Page 24]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


       ::= { tePathEntry 14 }

   tePathAdminStatus OBJECT-TYPE
       SYNTAX       INTEGER {
                        normal(1),
                        testing(2)
                    }
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The operational status of the path:
                    normal:      Used normally for forwarding.
                    testing:     Administratively set aside for testing.
                   "
       ::= { tePathEntry 15 }

   tePathComputedRoute OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The route computed for this path, perhaps using
                    some form of Constraint-based Routing.  The
                    algorithm is implementation dependent.

                    This object returns the computed route as an ordered
                    list of hops.  The value of this object gives the
                    primary index into the Hop Table.  The secondary
                    index is the hop count in the path, so to get the
                    route, one could get the first hop with index
                    <tePathComputedRoute, 1> in the Hop Table and do a
                    getnext to get subsequent hops.

                    A value of zero (0) means there is no computedRoute.
                   "
       ::= { tePathEntry 16 }

   tePathRecordedRoute OBJECT-TYPE
       SYNTAX       Unsigned32
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The route actually used for this path, as recorded
                    by the signaling protocol.  This is again an ordered
                    list of hops; each hop is expected to be strict.

                    The value of this object gives the primary index
                    into the Hop Table.  The secondary index is the hop
                    count in the path, so to get the route, one can get
                    the first hop with index <tePathRecordedRoute, 1>
                    in the Hop Table and do a getnext to get subsequent



Kompella                    Standards Track                    [Page 25]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    hops.

                    A value of zero (0) means there is no recordedRoute.
                   "
       ::= { tePathEntry 17 }

   -- ****************************************************************
   --
   -- Tunnel Path Hop Table
   --

   tePathHopTable   OBJECT-TYPE
       SYNTAX       SEQUENCE OF TePathHopEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "Table of Tunnel Path Hops."
       ::= { teMIBObjects 4 }

   tePathHopEntry   OBJECT-TYPE
       SYNTAX       TePathHopEntry
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "Entry containing information about a particular
                    hop.
                   "
       INDEX       { teHopListIndex, tePathHopIndex }
       ::= { tePathHopTable 1 }

   TePathHopEntry ::=
       SEQUENCE {
           teHopListIndex              Unsigned32,
           tePathHopIndex              Unsigned32,
        -- Conceptual row information
           tePathHopRowStatus          RowStatus,
           tePathHopStorageType        StorageType,
           tePathHopAddrType           TeHopAddressType,
           tePathHopAddress            TeHopAddress,
           tePathHopType               INTEGER
       }

   teHopListIndex   OBJECT-TYPE
       SYNTAX       Unsigned32 (1..4294967295)
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "An index that identifies a list of hops.  This is
                    the primary index to access hops.
                   "
       ::= { tePathHopEntry 1 }



Kompella                    Standards Track                    [Page 26]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   tePathHopIndex   OBJECT-TYPE
       SYNTAX       Unsigned32 (1..4294967295)
       MAX-ACCESS   not-accessible
       STATUS       current
       DESCRIPTION "An index that identifies a particular hop among the
                    list of hops for a path.  An index of i identifies
                    the ith hop.  This is the secondary index for a hop
                    entry.
                   "
       ::= { tePathHopEntry 2 }

   tePathHopRowStatus OBJECT-TYPE
       SYNTAX       RowStatus
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The status of this conceptual row.

                    Any field in this table can be changed, even if the
                    value of this object is 'active'.  However, such a
                    change may cause traffic to be rerouted or even
                    disrupted.
                   "
       ::= { tePathHopEntry 3 }

   tePathHopStorageType OBJECT-TYPE
       SYNTAX       StorageType
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The storage type for this conceptual row.

                    Conceptual rows having the value 'permanent' need
                    not allow write-access to any columnar objects
                    in the row.
                   "
       ::= { tePathHopEntry 4 }

   tePathHopAddrType OBJECT-TYPE
       SYNTAX       TeHopAddressType
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The type of Traffic Engineered Tunnel hop Address
                    of this hop.

                    The value of this object cannot be changed
                    if the value of the corresponding tePathRowStatus
                    object is 'active'.
                   "
       ::= { tePathHopEntry 5 }



Kompella                    Standards Track                    [Page 27]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   tePathHopAddress OBJECT-TYPE
       SYNTAX       TeHopAddress
       MAX-ACCESS   read-create
       STATUS       current
       DESCRIPTION "The Traffic Engineered Tunnel hop Address of this
                    hop.

                    The type of this address is determined by the value
                    of the corresponding tePathHopAddressType.

                    The value of this object cannot be changed
                    if the value of the corresponding teTunnelRowStatus
                    object is 'active'.
                   "
       ::= { tePathHopEntry 6 }

   tePathHopType    OBJECT-TYPE
       SYNTAX       INTEGER {
                        unknown(0),
                        loose(1),
                        strict(2)
                    }
       MAX-ACCESS   read-only
       STATUS       current
       DESCRIPTION "The type of hop:
                    unknown:
                    loose:    This hop is a LOOSE hop.
                    strict:   This hop is a STRICT hop.
                   "
       ::= { tePathHopEntry 7 }

   -- ****************************************************************
   --
   -- TE Notifications
   --

   teTunnelUp       NOTIFICATION-TYPE
       OBJECTS      { teTunnelName,
                      tePathName }  -- TunnelPath
       STATUS       current
       DESCRIPTION "A teTunnelUp notification is generated when the
                    Tunnel indexed by teTunnelName transitions to the
                    'up' state.

                    A tunnel is up when at least one of its paths is up.
                    The tePathName is the name of the path whose
                    transition to up made the tunnel go up.




Kompella                    Standards Track                    [Page 28]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    This notification MUST be limited to at most one
                    every minute, in case the tunnel flaps up and down.
                   "
       ::= { teMIBNotifications 1 }

   teTunnelDown     NOTIFICATION-TYPE
       OBJECTS      { teTunnelName,
                      tePathName }  -- TunnelPath
       STATUS       current
       DESCRIPTION "A teTunnelDown notification is generated when the
                    Tunnel indexed by teTunnelName transitions to the
                    'down' state.

                    A tunnel is up when at least one of its paths is up.
                    The tePathName is the name of the path whose
                    transition to down made the tunnel go down.

                    This notification MUST be limited to at most one
                    every minute, in case the tunnel flaps up and down.
                   "
       ::= { teMIBNotifications 2 }

   teTunnelChanged  NOTIFICATION-TYPE
       OBJECTS      { teTunnelName,
                      tePathName }  -- toTunnelPath
       STATUS       current
       DESCRIPTION "A teTunnelChanged notification is generated when an
                    active path on the Tunnel indexed by teTunnelName
                    changes or a new path becomes active.  The value
                    of tePathName is the new active path.

                    This notification MUST be limited to at most one
                    every minute, in case the tunnel changes quickly.
                   "
       ::= { teMIBNotifications 3 }

   teTunnelRerouted NOTIFICATION-TYPE
       OBJECTS      { teTunnelName,
                      tePathName }  -- toTunnelPath
       STATUS       current
       DESCRIPTION "A teTunnelRerouted notification is generated when
                    an active path for the Tunnel indexed by
                    teTunnelName stays the same, but its route changes.

                    This notification MUST be limited to at most one
                    every minute, in case the tunnel reroutes quickly.
                   "
       ::= { teMIBNotifications 4 }



Kompella                    Standards Track                    [Page 29]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   -- End of TE-MIB objects

   -- ****************************************************************
   --
   -- TE Compliance Statements
   --

   teGroups
       OBJECT IDENTIFIER ::= { teMIBConformance 1 }

   teModuleCompliance
       OBJECT IDENTIFIER ::= { teMIBConformance 2 }

   -- ****************************************************************
   --
   -- TE object groups
   --

   teTrafficEngineeringGroup OBJECT-GROUP
       OBJECTS {
           teTunnelName,
           teTunnelNextPathIndex,
           teTunnelRowStatus,
           teTunnelStorageType,
           teTunnelSourceAddressType,
           teTunnelSourceAddress,
           teTunnelDestinationAddressType,
           teTunnelDestinationAddress,
           teTunnelState,
           teTunnelDiscontinuityTimer,
           teTunnelOctets,
           teTunnelPackets,
           teTunnelLPOctets,
           teTunnelLPPackets,
           teTunnelAge,
           teTunnelTimeUp,
           teTunnelPrimaryTimeUp,
           teTunnelTransitions,
           teTunnelLastTransition,
           teTunnelPathChanges,
           teTunnelLastPathChange,
           teTunnelConfiguredPaths,
           teTunnelStandbyPaths,
           teTunnelOperationalPaths,
           tePathBandwidth,
           tePathIncludeAny,
           tePathIncludeAll,
           tePathExclude,



Kompella                    Standards Track                    [Page 30]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


           tePathSetupPriority,
           tePathHoldPriority,
           tePathProperties,
           tePathOperStatus,
           tePathAdminStatus,
           tePathComputedRoute,
           tePathRecordedRoute,
           teDistProtocol,
           teSignalingProto,
           teNotificationEnable,
           teNextTunnelIndex,
           teNextPathHopIndex,
           teAdminGroupName,
           teAdminGroupRowStatus,
           teConfiguredTunnels,
           teActiveTunnels,
           tePrimaryTunnels,
           tePathName,
           tePathType,
           tePathRowStatus,
           tePathStorageType,
           tePathConfiguredRoute,
           tePathHopRowStatus,
           tePathHopStorageType,
           tePathHopAddrType,
           tePathHopAddress,
           tePathHopType
       }
       STATUS       current
       DESCRIPTION "Objects for Traffic Engineering in this MIB module."
       ::= { teGroups 1 }

   teNotificationGroup NOTIFICATION-GROUP
      NOTIFICATIONS {
          teTunnelUp,
          teTunnelDown,
          teTunnelChanged,
          teTunnelRerouted
      }
      STATUS       current
      DESCRIPTION "Notifications specified in this MIB module."
      ::= { teGroups 2 }

   -- ****************************************************************
   --
   -- TE compliance statements
   --
   --    There are four compliance statements: read-only and full



Kompella                    Standards Track                    [Page 31]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   --    compliance for regular TE devices, and read-only and full
   --    compliance for path computation servers.
   --

   teModuleReadOnlyCompliance MODULE-COMPLIANCE
       STATUS       current
       DESCRIPTION "When this MIB module is implemented without support
                    for read-create (i.e., in read-only mode), then such
                    an implementation can claim read-only compliance.
                    Such a device can be monitored but cannot be
                    configured with this MIB module.
                   "

       MODULE       -- enclosing module, i.e., TE-MIB

           MANDATORY-GROUPS {
               teTrafficEngineeringGroup
           }

           GROUP        teNotificationGroup
           DESCRIPTION "Implementation of this group is optional."

           OBJECT       teNotificationEnable
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teAdminGroupName
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teAdminGroupRowStatus
           SYNTAX       RowStatus { active(1) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelName
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelRowStatus
           SYNTAX       RowStatus { active(1) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelStorageType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."




Kompella                    Standards Track                    [Page 32]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


           OBJECT       teTunnelSourceAddressType
           SYNTAX       TeHopAddressType { ipv4(1), ipv6(2) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required.  An
                        implementation is only required to support
                        IPv4 and IPv6 host addresses."

           OBJECT       teTunnelSourceAddress
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelDestinationAddressType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelDestinationAddress
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathName
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathRowStatus
           SYNTAX       RowStatus { active(1) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathStorageType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathConfiguredRoute
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathBandwidth
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathIncludeAny
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."




Kompella                    Standards Track                    [Page 33]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


           OBJECT       tePathIncludeAll
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathExclude
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathSetupPriority
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHoldPriority
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathProperties
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathAdminStatus
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHopRowStatus
           SYNTAX       RowStatus { active(1) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHopStorageType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHopAddrType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHopAddress
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

       ::= { teModuleCompliance 1 }

   teModuleFullCompliance MODULE-COMPLIANCE
       STATUS       current
       DESCRIPTION "When this MIB module is implemented with support for
                    read-create, then the implementation can claim
                    full compliance.  Such devices can be both



Kompella                    Standards Track                    [Page 34]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                    monitored and configured with this MIB module.
                   "

       MODULE       -- enclosing module, i.e., TE-MIB

           MANDATORY-GROUPS {
               teTrafficEngineeringGroup
           }

           GROUP        teNotificationGroup
           DESCRIPTION "Implementation of this group is optional."


           OBJECT       teAdminGroupRowStatus
           SYNTAX       RowStatus { active(1) }
           WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) }
           DESCRIPTION "Support for notInService, createAndWait and
                        notReady is not required.
                       "

           OBJECT       teTunnelRowStatus
           SYNTAX       RowStatus { active(1), notInService(2) }
           WRITE-SYNTAX RowStatus { active(1), notInService(2),
                                    createAndGo(4), destroy(6)
                                  }
           DESCRIPTION "Support for createAndWait and notReady is not
                        required.
                       "

           OBJECT       teTunnelSourceAddressType
           SYNTAX       TeHopAddressType { ipv4(1), ipv6(2) }
           DESCRIPTION "Write access is required.  An implementation is
                        only required to support IPv4 and IPv6 host
                        addresses.
                       "

           OBJECT       tePathRowStatus
           SYNTAX       RowStatus { active(1), notInService(2) }
           WRITE-SYNTAX RowStatus { active(1), notInService(2),
                                    createAndGo(4), destroy(6)
                                  }
           DESCRIPTION "Support for createAndWait and notReady is not
                        required.
                       "

           OBJECT       tePathHopRowStatus
           SYNTAX       RowStatus { active(1), notInService(2) }
           WRITE-SYNTAX RowStatus { active(1), notInService(2),



Kompella                    Standards Track                    [Page 35]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


                                    createAndGo(4), destroy(6)
                                  }
           DESCRIPTION "Support for createAndWait and notReady is not
                        required.
                       "
       ::= { teModuleCompliance 2 }

   teModuleServerReadOnlyCompliance MODULE-COMPLIANCE
       STATUS       current
       DESCRIPTION "When this MIB module is implemented by a path
                    computation server without support for read-create
                    (i.e., in read-only mode), then the implementation
                    can claim read-only compliance.  Such
                    a device can be monitored but cannot be
                    configured with this MIB module.
                   "

       MODULE       -- enclosing module, i.e., TE-MIB

           MANDATORY-GROUPS {
               teTrafficEngineeringGroup
           }

           GROUP        teNotificationGroup
           DESCRIPTION "Implementation of this group is optional."

           OBJECT       teNotificationEnable
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teAdminGroupName
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teAdminGroupRowStatus
           SYNTAX       RowStatus { active(1) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelName
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelRowStatus
           SYNTAX       RowStatus { active(1) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."




Kompella                    Standards Track                    [Page 36]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


           OBJECT       teTunnelStorageType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelSourceAddressType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required.  A path
                        computation server SHOULD implement all types
                        of tunnel source address types.
                       "

           OBJECT       teTunnelSourceAddress
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelDestinationAddressType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       teTunnelDestinationAddress
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathName
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathRowStatus
           SYNTAX       RowStatus { active(1) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathStorageType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathConfiguredRoute
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathBandwidth
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."




Kompella                    Standards Track                    [Page 37]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


           OBJECT       tePathIncludeAny
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathIncludeAll
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathExclude
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathSetupPriority
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHoldPriority
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathProperties
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathAdminStatus
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHopRowStatus
           SYNTAX       RowStatus { active(1) }
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHopStorageType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHopAddrType
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

           OBJECT       tePathHopAddress
           MIN-ACCESS   read-only
           DESCRIPTION "Write access is not required."

       ::= { teModuleCompliance 3 }

   teModuleServerFullCompliance MODULE-COMPLIANCE



Kompella                    Standards Track                    [Page 38]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


       STATUS       current
       DESCRIPTION "When this MIB module is implemented by a path
                    computation server with support for read-create,
                    then the implementation can claim full
                    compliance.
                   "

       MODULE       -- enclosing module, i.e., TE-MIB
           MANDATORY-GROUPS {
               teTrafficEngineeringGroup
           }

           GROUP        teNotificationGroup
           DESCRIPTION "Implementation of this group is optional."


           OBJECT       teAdminGroupRowStatus
           SYNTAX       RowStatus { active(1) }
           WRITE-SYNTAX RowStatus { createAndGo(4), destroy(6) }
           DESCRIPTION "Support for notInService, createAndWait, and
                        notReady is not required.
                       "

           OBJECT       teTunnelRowStatus
           SYNTAX       RowStatus { active(1), notInService(2) }
           WRITE-SYNTAX RowStatus { active(1), notInService(2),
                                    createAndGo(4), destroy(6)
                                  }
           DESCRIPTION "Support for createAndWait and notReady is not
                        required.
                       "

           OBJECT       teTunnelSourceAddressType
           DESCRIPTION "Write access is required.  An implementation
                        of a path computation server SHOULD support all
                        types of tunnel source address types.
                       "

           OBJECT       tePathRowStatus
           SYNTAX       RowStatus { active(1), notInService(2) }
           WRITE-SYNTAX RowStatus { active(1), notInService(2),
                                    createAndGo(4), destroy(6)
                                  }
           DESCRIPTION "Support for createAndWait and notReady is not
                        required.
                       "

           OBJECT       tePathHopRowStatus



Kompella                    Standards Track                    [Page 39]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


           SYNTAX       RowStatus { active(1), notInService(2) }
           WRITE-SYNTAX RowStatus { active(1), notInService(2),
                                    createAndGo(4), destroy(6)
                                  }
           DESCRIPTION "Support for createAndWait and notReady is not
                        required.
                       "
       ::= { teModuleCompliance 4 }

   END

6.  References

6.1.  Normative References

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

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

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

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

   [5]  Nadeau, T. and J. Cucchiara, "Definitions of Textual Conventions
        (TCs) for Multiprotocol Label Switching (MPLS) Management", RFC
        3811, June 2004.

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

   [7]  Awduche, D., Malcolm, J., Agogbua, J., O'Dell, M., and J.
        McManus, "Requirements for Traffic Engineering Over MPLS", RFC
        2702, September 1999.

6.2.  Informative References

   [8]  Awduche, D., Berger, L., Gan, D., Li, T., Srinivasan, V., and G.
        Swallow, "RSVP-TE: Extensions to RSVP for LSP Tunnels", RFC
        3209, December 2001.






Kompella                    Standards Track                    [Page 40]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


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

   [10] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB",
        RFC 2863, June 2000.

   [11] Thaler, D., "IP Tunnel MIB", RFC 2667, August 1999.

   [12] Jamoussi, B., Andersson, L., Callon, R., Dantu, R., Wu, L.,
        Doolan, P., Worster, T., Feldman, N., Fredette, A., Girish, M.,
        Gray, E., Heinanen, J., Kilty, T., and A. Malis, "Constraint-
        Based LSP Setup using LDP", RFC 3212, January 2002.

7.  Security Considerations

   This MIB module relates to the configuration and management of
   Traffic Engineering tunnels.  The unauthorized manipulation of fields
   in the tables teAdminGroupTable, teTunnelTable, tePathTable, and
   tePathHopTable may lead to tunnel flapping, tunnel paths being
   changed, or traffic being disrupted.  In addition, if these tables
   are read by unauthorized parties, the information can be used to
   trace traffic patterns, traffic volumes, and tunnel paths.  This may
   be considered proprietary and confidential information by some
   providers.

   There are a number of management objects defined in this MIB module
   with 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.  These are the tables and objects and their
   sensitivity/vulnerability:

   teAdminGroupTable: Changing this will affect the semantics of include
   and exclude constraints, and thus traffic takes unintended routes.

   teTunnelTable: Changing this affects many properties of traffic
   tunnels.

   tePathTable: Changing this affects the constraints (including
   bandwidth) of tunnel paths, as well as the status of the path.

   tePathHopTable: Changing this affects the route followed by a traffic
   tunnel path.






Kompella                    Standards Track                    [Page 41]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


   Some of the readable objects in this MIB module (i.e., objects with a
   MAX-ACCESS other than not-accessible) may be considered sensitive or
   vulnerable in some network environments.  It is thus important to
   control even GET and/or NOTIFY access to these objects and possibly
   to even encrypt the values of these objects when sending them over
   the network via SNMP.  These are the tables and objects and their
   sensitivity/vulnerability:

      teTunnelTable:  Describes tunnel endpoints and traffic volumes.
      tePathTable:    Describes path properties.
      tePathHopTable: Describes path routes.

   SNMP versions prior to SNMPv3 did not include adequate security.
   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 module.

   It is RECOMMENDED that implementers consider the security features as
   provided by the SNMPv3 framework (see [9], section 8), including full
   support for the SNMPv3 cryptographic mechanisms (for authentication
   and privacy).

   Further, deployment of SNMP versions prior to SNMPv3 is NOT
   RECOMMENDED.  Instead, it is RECOMMENDED to deploy SNMPv3 and to
   enable cryptographic security.  It is then a customer/operator
   responsibility to ensure that the SNMP entity giving access to an
   instance of this MIB module 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.

Acknowledgments

   It was Tony Li's suggestion that the author embark on this MIB.  Many
   thanks to him and to Der-Hwa Gan for their input and help.

   Many thanks, too, to Bert Wijnen for his incredible help, both with
   improving the correctness, structure, and readability of the MIB
   module, and with the text of the RFC.  Thanks also to Adrian Farrel
   for his detailed review.











Kompella                    Standards Track                    [Page 42]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


Author's Address

   Kireeti Kompella
   Juniper Networks, Inc.
   1194 N. Mathilda Ave
   Sunnyvale, CA 94089

   EMail: kireeti@juniper.net











































Kompella                    Standards Track                    [Page 43]
^L
RFC 3970             A Traffic Engineering (TE) MIB         January 2005


Full Copyright Statement

   Copyright (C) The Internet Society (2005).

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

   This document and the information contained herein are provided on an
   "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
   OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY AND THE INTERNET
   ENGINEERING TASK FORCE DISCLAIM ALL WARRANTIES, EXPRESS OR IMPLIED,
   INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE
   INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED
   WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

Intellectual Property

   The IETF takes no position regarding the validity or scope of any
   Intellectual Property Rights or other rights that might be claimed to
   pertain to the implementation or use of the technology described in
   this document or the extent to which any license under such rights
   might or might not be available; nor does it represent that it has
   made any independent effort to identify any such rights.  Information
   on the IETF's procedures with respect to rights in IETF Documents can
   be found in BCP 78 and BCP 79.

   Copies of IPR disclosures made to the IETF Secretariat and any
   assurances of licenses to be made available, or the result of an
   attempt made to obtain a general license or permission for the use of
   such proprietary rights by implementers or users of this
   specification can be obtained from the IETF on-line IPR repository at
   http://www.ietf.org/ipr.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights that may cover technology that may be required to implement
   this standard.  Please address the information to the IETF at ietf-
   ipr@ietf.org.

Acknowledgement

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







Kompella                    Standards Track                    [Page 44]
^L