path: root/doc/rfc/rfc2515.txt

Network Working Group                                 K. Tesink, Editor
Request for Comments: 2515                 Bell Communications Research
Obsoletes: 1695                                           February 1999
Category: Standards Track


                     Definitions of Managed Objects
                           for ATM Management

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 (1999).  All Rights Reserved.

Table of Contents

   1 Abstract  .............................................    2
   2 The SNMP Network Management Framework .................    2
   3 ATM Terminology .......................................    3
   3.1 VCL/VPL and VCC/VPC .................................    3
   3.2 PVC, SVC and Soft PVC ...............................    5
   3.3 Traffic Management Parameters .......................    6
   3.3.1 Traffic Policing and Traffic Shaping  Parameters
        ....................................................    6
   3.3.2 Cell Loss Priority ................................    6
   3.3.3 QoS Class .........................................    6
   3.3.4 Service Category ..................................    7
   3.4 Max Active and Max Current VPI and VCI Bits .........    7
   4 Overview ..............................................    8
   4.1 Background ..........................................    8
   4.2 Structure of the MIB ................................    9
   4.3 ATM Interface Configuration Table ...................    9
   4.4 ATM Interface DS3 PLCP and TC Layer Tables ..........    9
   4.5 ATM Virtual Link and Cross-Connect Tables ...........    9
   5 Application of MIB II to ATM ..........................   10
   5.1 The System Group ....................................   10
   5.2 The Interface Group .................................   10
   5.2.1 Support of the ATM Cell Layer by ifTable ..........   10
   6 Support of the AAL3/4 Based Interfaces ................   12
   7 Support of the AAL5 Managed Objects ...................   12
   7.1 Managing AAL5 in a Switch ...........................   12



Tesink                      Standards Track                     [Page 1]
^L
RFC 2515                 ATM Management Objects            February 1999


   7.2 Managing AAL5 in a Host .............................   14
   7.3 Support of AAL5 by ifTable ..........................   15
   7.4 Support of Proprietary Virtual Interface  by  ifT-
        able ...............................................   16
   7.5 AAL5 Connection Performance Statistics Table ........   17
   8 ILMI MIBs and the ATM Managed Objects .................   18
   9 Definitions ...........................................   20
   10 Acknowledgments ......................................   83
   11 References ...........................................   83
   12 Security Considerations ..............................   85
   13 Author's Address .....................................   85
   14 Intellectual Property ................................   86
   15 Full Copyright Statement .............................   87

1.  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 objects used for managing ATM-based
   interfaces, devices, networks and services.

   This memo replaces RFC 1695 [24].  Changes relative to RFC 1695 are
   summarized in the MIB module's REVISION clause.

   Textual Conventions used in this MIB are defined in [6] and [19].

2.  The SNMP Network Management Framework

   The SNMP Management Framework presently consists of five major
   components:

   0    An overall architecture, described in RFC 2271 [1].

   0    Mechanisms for describing and naming objects and events
        for the purpose of management.  The first version of this
        Structure of Management Information (SMI) is called SMIv1 and
        described in STD 16, RFC 1155 [2], STD 16, RFC 1212 [3] and RFC
        1215 [4].  The second version, called SMIv2, is described in RFC
        1902 [5], RFC 1903 [6] and RFC 1904 [7].

   0    Message protocols for transferring management information.  The
        first version of the SNMP message protocol is called SNMPv1 and
        described in STD 15, RFC 1157 [8].  A second version of the SNMP
        message protocol, which is not an Internet standards track
        protocol, is called SNMPv2c and described in RFC 1901 [9] and
        RFC 1906 [10].





Tesink                      Standards Track                     [Page 2]
^L
RFC 2515                 ATM Management Objects            February 1999


        The third version of the message protocol is called SNMPv3 and
        described in RFC 1906 [10], RFC 2272 [11] and RFC 2274 [12].

   0    Protocol operations for accessing management information.  The
        first set of protocol operations and associated PDU formats is
        described in STD 15, RFC 1157 [8].  A second set of protocol
        operations and associated PDU formats is described in RFC 1905
        [13].

   0    A set of fundamental applications described in RFC 2273 [14] and
        the view-based access control mechanism described in RFC 2275
        [15].

   Managed objects are accessed via a virtual information store, termed
   the Management Information Base or MIB.  Objects in the MIB are
   defined using the mechanisms defined in the SMI.

   This memo specifies a MIB module that is compliant to the SMIv2.  A
   MIB conforming to the SMIv1 can be produced through the appropriate
   translations.  The resulting translated MIB must be semantically
   equivalent, except where objects or events are omitted because no
   translation is possible (e.g., use of Counter64).  Some machine
   readable information in SMIv2 will be converted into textual
   descriptions in SMIv1 during the translation process.  However, this
   loss of machine readable information is not considered to change the
   semantics of the MIB.

3.  ATM Terminology

   Some basic ATM terminologies are described in this section to
   facilitate defining the ATM managed objects.

3.1.  VCL/VPL and VCC/VPC

   There are two distinct types of ATM virtual connections: Virtual
   Channel Connections (VCCs) and Virtual Path Connection (VPCs).  As
   shown in Figures 1 and 2, ATM virtual connections consist of
   concatenated series of virtual links which forms a path between two
   end points, with each concatenation occurring at an ATM switch.
   Virtual links of VCCs are called Virtual Channel Links (VCLs).
   Virtual links of VPCs are called Virtual Path Links (VPLs). The VCI
   and VPI fields in the ATM cell header associate each cell of a VCC
   with a particular VCL over a given physical link.  The VPI field in
   the ATM cell header associates each cell of a VPC with a particular
   VPL over a given physical link.  Switches route cells between VCLs
   (or VPLs) via a cross-connect function according to the cells'
   VCI/VPI (or VPI) values.




Tesink                      Standards Track                     [Page 3]
^L
RFC 2515                 ATM Management Objects            February 1999


     <-----------------------VCC-------------------------->
               ------------             -----------
               |ATM       |             |ATM       |
               |X-Connect |             |X-Connect |
        VCL1   |Point     |    VCL2     |Point     |  VCL3
     O---------|----X-----|-------|-----|----X-----|-------O
               |          |             |          |
               ------------             ------------
                ATM Switch               ATM Switch


     Figure 1: Virtual Channel Links and
               Virtual Channel Connection



     <-----------------------VPC-------------------------->
               ------------             -----------
               |ATM       |             |ATM       |
               |X-Connect |             |X-Connect |
        VPL1   |Point     |    VPL2     |Point     |  VPL3
     O---------|----X-----|-------|-----|----X-----|-------O
               |          |             |          |
               ------------             ------------
                ATM Switch               ATM Switch


     Figure 2: Virtual Path Links and
               Virtual Path Connection


   A single ATM end-system or switch does not support the whole end-to-
   end span of a VCC (or VPC).  Rather, multiple ATM end-systems and/or
   switches each support one piece of the VCC (or VPC).  That is, each
   ATM end-system (or ATM switch) at one end of the VCC/VPC supports its
   end of the VCC/VPC plus the VCL or VPL on its external interface, and
   each switch through which the VCC/VPC passes supports the pair of
   VCLs/VPLs on its external interfaces as well as the cross-connection
   of those VCLs/VPLs. Thus, the end-to-end management of a VCC or VPC
   is achieved only by appropriate management of its individual pieces
   in combination.

   Note that for management purposes, an ATM network may be viewed as a
   large distributed switch by hiding all the network's internal
   connectivity as being internal to the distributed switch (as shown in
   Figure 2a).  This model may for example be used for Customer Network
   Management (CNM) purposes.




Tesink                      Standards Track                     [Page 4]
^L
RFC 2515                 ATM Management Objects            February 1999


     <---------------------VCC--------------------------->
             --------------------------------------
             |                                    |
             | ----------              ---------- |
             | | ATM    |              | ATM    | |
        VCL1 | | Switch |              | Switch | | VCL3
     O-------|-|--------|------/-------|--------|-|------O
             | |        |              |        | |
             | ----------              ---------- |
             |                                    |
             |             ATM Network            |
             --------------------------------------


     Figure 2a: ATM Network modeled as a large distributed
                switch

   A VCC has a set of traffic characteristics (i.e., bandwidth
   parameters, service category parameters, etc.).  VCLs inherit their
   traffic characteristics from the VCC of which they are a part.  VCCs
   are bi-directional by definition.  However, the traffic parameters in
   the two directions of a connection can be symmetric or asymmetric,
   i.e., the two directions can have the same or different traffic
   flows.  A uni-directional traffic flow across a VCC is achieved by
   assigning a zero bandwidth in one direction.  Note that in addition
   to the bandwidth required by the user traffic flow, bandwidth is also
   required for OAM cell flows, even for the zero-bandwidth direction of
   a uni-directional connection.  These same principles apply to VPCs.

3.2.  PVC, SVC and Soft PVC

   A Permanent Virtual Connection (PVC) is a provisioned VCC or VPC.  A
   Switched Virtual Connection (SVC) is a switched VCC or VPC that is
   set up in real-time via call set-up signaling procedures.  A PVC (or
   an SVC) can be a point-to-point, point-to-multipoint, or multipoint-
   to-multipoint VCC or VPC.  A Soft PVC is a connection of which
   portions are switched, while other portions are permanent (see Figure
   3 and [22]).


       +--------+           +--------+           +--------+
    pvc|  ATM   |svc    svc |  ATM   |svc    svc |  ATM   |pvc
   ----| Switch |-----------| Switch |-----------| Switch |----
       +--------+           +--------+           +--------+

                  Figure 3: An example of a Soft PVC





Tesink                      Standards Track                     [Page 5]
^L
RFC 2515                 ATM Management Objects            February 1999


3.3.  Traffic Management Parameters

3.3.1.  Traffic Policing and Traffic Shaping Parameters

   In order to allocate resources fairly among different users, some
   networks police traffic at resource access points.  The traffic
   enforcement or policing taken at a UNI is called Usage Parameter
   Control (UPC) and is conceptually activated on an incoming VCL or VPL
   as shown in Figure 4.  The use of the traffic enforcer at the ingress
   of the connection is to make sure that the user traffic does not
   exceed the negotiated traffic parameters such as the peak cell rate
   associated with a specific traffic descriptor type.

              ----------             ----------
       UNI    |  ATM   |    NNI      |  ATM   |     UNI
        |     | switch |     |       | switch |      |
   O<---|---->X(UPC)   |<----|------>|   (UPC)X<-----|--->O
        | VCL |        |     | VCL   |        |  VCL |
              ----------             ----------


                  Figure 4: An Example of a UPC

   In addition, traffic shaping may be performed on an outgoing VPL or
   VCL at a given ATM interface.  The function of the ATM traffic
   shaper, conceptually either at the source or an egress point of the
   connection, is to smooth the outgoing cell traffic inter-arrival
   time.  If policing or shaping is not performed then the policing or
   shaping algorithm is not activated.

3.3.2.  Cell Loss Priority

   To prioritize traffic during resource congestion, ATM cells are
   assigned one of the two types of Cell Loss Priority (CLP), CLP=0 and
   CLP=1.  ATM cells with CLP=0 have a higher priority in regard to cell
   loss than ATM cells with CLP=1.  Therefore, during resource
   congestions, CLP=1 cells are dropped before any CLP=0 cell is
   dropped.

3.3.3.  QoS Class

   RFC1695 specified that one of a number of Quality of Service (QoS)
   classes is assigned to a VCC or VPC by associating the object
   atmTrafficQoSClass with each VCL or VPL.  However, new insights in
   ATM traffic management have caused this object to be deprecated.






Tesink                      Standards Track                     [Page 6]
^L
RFC 2515                 ATM Management Objects            February 1999


3.3.4.  Service Category

   Replacing QoS Class, VPLs and VCLs are qualified in terms of their
   service category (atmServiceCategory). When properly configured, VCLs
   (or VPLs) concatenated to form a VCC (or VPC) will all have the same
   service category class as that of the VCC (or VPC).

3.4.  Max Active and Max Current VPI and VCI Bits

   A manager may wish to configure the maximum number of VPI and VCI
   bits that can be used to identify VPIs and VCIs on a given ATM
   interface.  This value can be less than or equal to the maximum
   number of bits supported by the interface hardware, and is referred
   to in the MIB as the Max Active VPI Bits and Max Active VCI Bits.

   However, a manager may not be able to configure the Max Active Bits
   on both ends of an ATM link.  For example, the manager may not be
   allowed write access to the peer's MIB, or there may be hardware
   limitations on the peer device.  Therefore, the two ATM devices may
   use ILMI to negotiate "Max Current" VPI and VCI bits, which is the
   maximum number of bits that both interfaces are willing to support.
   This is illustrated in Figure 5. The relationship between the
   different parameters is illustrated in Figure 6.  Note that if ILMI
   negotiation is not supported, then the devices have no choice but to
   use the configured Max Active bits, and assume that it has been
   configured to the same value on both ends of the link.


     +--------+              +--------+              +--------+
     |  ATM   | IF a    IF b |  ATM   | IF c    IF d |  ATM   |
     | Device |--------------| Device |--------------| Device |
     +--------+              +--------+              +--------+

         IF a:  Max Active VPI Bits =  6  (configured)
                Max Current VPI Bits = 6  (negotiated)

         IF b:  Max Active VPI Bits =  8  (configured)
                Max Current VPI Bits = 6  (negotiated)

         IF c:  Max Active VPI Bits =  8  (configured)
                Max Current VPI Bits = 8  (negotiated)

         IF d:  Max Active VPI Bits =  8  (configured)
                Max Current VPI Bits = 8  (negotiated)







Tesink                      Standards Track                     [Page 7]
^L
RFC 2515                 ATM Management Objects            February 1999


         (between IF a and IF b, the minimum of the two configured
          "Max Active VPI Bits" is 6, so both interfaces set their
          "Max Current VPI Bits" to 6.  Since IF c and IF d both
          are configured with "Max Active VPI Bits" of 8, they
          set their "Max Current VPI Bits" to 8.)

                                  Figure 5


       MSB                                                   LSB
         +----------------------------------------------------+
         |         |         |                |               |
         +----------------------------------------------------+
         ^         ^         ^                ^
         |         |         |                |
    Max bits    Max Bits    Max              Max
    supported   supported   Active (config.) current (negotiated)
    by MIB      by h/w      Bits             Bits

                                  Figure 6

4.  Overview

   ATM management objects are used to manage ATM interfaces, ATM virtual
   links,  ATM cross-connects, AAL5 entities and AAL5 connections
   supported by ATM hosts, ATM switches and ATM networks.  This section
   provides an overview and background of how to use this MIB and other
   potential MIBs for this purpose.

   The purpose of this memo is primarily to manage ATM PVCs.  ATM SVCs
   are also represented by the management information in this MIB.
   However, full management of SVCs may require additional capabilities
   which are beyond the scope of this memo.

4.1.  Background

   In addition to the MIB module defined in this memo, other MIB modules
   are necessary to manage ATM interfaces, links and cross-connects.
   Examples include MIB II for general system and interface management
   [16][17], the DS3 or SONET MIBs for management of physical
   interfaces, and, as appropriate, MIB modules for applications that
   make use of ATM, such as SMDS.  These MIB modules are outside the
   scope of this specification.

   The current specification of this ATM MIB is based on SNMPv2-SMI.






Tesink                      Standards Track                     [Page 8]
^L
RFC 2515                 ATM Management Objects            February 1999


4.2.  Structure of the MIB

   The managed ATM objects are arranged into the following tables:

         (1) ATM interface configuration table
         (2) ATM interface DS3 PLCP  and TC sublayer tables
         (3) ATM traffic parameter table
         (4) ATM interface virtual link (VPL/VCL) configuration
             tables
         (5) ATM VP/VC cross-connect tables
         (6) AAL5 connection performance statistics table

   Note that, managed objects for activation/deactivation of OAM cell
   flows and ATM traps notifying virtual connection or virtual link
   failures are outside the scope of this memo.

4.3.  ATM Interface Configuration Table

   This table contains information on ATM cell layer configuration of
   local ATM interfaces on an ATM device in addition to the information
   on such interfaces contained in the ifTable.

4.4.  ATM Interface DS3 PLCP and TC Layer Tables

   These tables provide performance statistics of the DS3 PLCP and TC
   sublayer of local ATM interfaces on a managed ATM device.  DS3 PLCP
   and TC sublayer are currently used to carry ATM cells respectively
   over DS3 and SONET transmission paths.

4.5.  ATM Virtual Link and Cross-Connect Tables

   ATM virtual link and cross-connect tables model bi-directional ATM
   virtual links and ATM cross-connects.  The ATM VP/VC link tables are
   implemented in an ATM host, ATM switch and ATM network.  The ATM
   switch and ATM network also implement the ATM VP/VC cross-connect
   tables.  Both link and cross-connect tables are implemented in a
   carrier's network for Customer Network Management (CNM) purposes.

   The ATM virtual link tables are used to create, delete or modify ATM
   virtual links in an ATM host, ATM switch and ATM network.  ATM
   virtual link tables along with the cross-connect tables are used to
   create, delete or modify ATM cross-connects in an ATM switch or ATM
   network (e.g., for CNM purposes).

   For a PVC, the cross-connect between two VPLs is represented in the
   atmVpCrossConnectTable of the ATM-MIB, indexed by the
   atmVplCrossConnectIdentifier values for the two VPLs, and the cross-




Tesink                      Standards Track                     [Page 9]
^L
RFC 2515                 ATM Management Objects            February 1999


   rconnect between two VCLs is represented in the
   atmVcCrossConnectTable of the ATM-MIB, indexed by the
   atmVclCrossConnectIdentifier values for the two VCLs.

   For an SVC or Soft PVC the VPL and VCL tables defined in this memo
   are used. Hoewever, for an SVC or Soft PVC the cross-connect between
   two VPLs is represented in the atmSvcVpCrossConnectTable of the
   ATM2-MIB, indexed by the atmVplCrossConnectIdentifier values for the
   two VPLs, and the cross-connect between two VCLs is represented in
   the atmSvcVcCrossConnectTable of the ATM2-MIB, indexed by the
   atmVclCrossConnectIdentifier values for the two VCLs.

   Note: The ATM2-MIB module was being defined in a separate memo at the
   time of this publication. Please consult the RFC directory for an
   exact reference.

5.  Application of MIB II to ATM

5.1.  The System Group

   For the purposes of the sysServices object in the System Group of MIB
   II [16], ATM is a data link layer protocol.  Thus, for ATM switches
   and ATM networks, sysServices will have the value "2".

5.2.  The Interface Group

   The Interfaces Group of MIB II defines generic managed objects for
   managing interfaces.  This memo contains the media-specific
   extensions to the Interfaces Group for managing ATM interfaces.

   This memo assumes the interpretation of the Interfaces Group to be in
   accordance with [17] which states that the interfaces table (ifTable)
   contains information on the managed resource's interfaces and that
   each sub-layer below the internetwork layer of a network interface is
   considered an interface.  Thus, the ATM cell layer interface is
   represented as an entry in the ifTable.  This entry is concerned with
   the ATM cell layer as a whole, and not with individual virtual
   connections which are managed via the ATM-specific managed objects
   specified in this memo.  The inter-relation of entries in the ifTable
   is defined by Interfaces Stack Group defined in [17].

5.2.1.  Support of the ATM Cell Layer by ifTable

   Some specific interpretations of ifTable for the ATM cell layer
   follow.






Tesink                      Standards Track                    [Page 10]
^L
RFC 2515                 ATM Management Objects            February 1999


   Object     Use for the generic ATM layer
   ======     =============================

   ifIndex    Each ATM port is represented by an ifEntry.

   ifDescr    Description of the ATM interface.

   ifType     The value that is allocated for ATM is 37.

   ifSpeed    The total bandwidth in bits per second
              for use by the ATM layer.

   ifPhysAddress  The interface's address at the ATM protocol
              sublayer; the ATM address which would be used as the value
              of the Called Party Address Information Element (IE) of a
              signalling message for a connection which either:
              - would terminate at this interface, or
              - for which the Called Party Address IE
                would need to be replaced by the Called Party SubAddress
                IE before the message was forwarded to any other
                interface.
              For an interface on which signalling is not supported,
              then the interface does not necessarily have an address,
              but if it does, then ifPhysAddress is the address which
              would be used as above in the event that signalling were
              supported.  If the interface has multiple such addresses,
              then ifPhysAddress is its primary address. If the
              interface has no addresses, then ifPhysAddress is an octet
              string of zero length.  Address encoding is as per [20].
              Note that addresses assigned for purposes other than those
              listed above (e.g., an address associated with the service
              provider side of a public network UNI) may be represented
              through atmInterfaceSubscrAddress.

   ifAdminStatus  See [17].

   ifOperStatus   Assumes the value down(2) if the ATM cell
              layer is down.

   ifLastChange   See [17].

   ifInOctets     The number of received octets over the
              interface, i.e., the number of received, assigned cells
              multiplied by 53.

   ifOutOctets    The number of transmitted octets over the interface,
              i.e., the number of transmitted, assigned cells multiplied
              by 53.



Tesink                      Standards Track                    [Page 11]
^L
RFC 2515                 ATM Management Objects            February 1999


   ifInErrors     The number of cells dropped due to uncorrectable HEC
              errors.

   ifInUnknownProtos The number of received cells discarded during cell
              header validation, including cells with unrecognized
              VPI/VCI values, and cells with invalid cell header
              patterns.  If cells with undefined PTI values are
              discarded, they are also counted here.

   ifOutErrors    See [17].

   ifName     Textual name (unique on this system) of the
              interface or an octet string of zero length.

   ifLinkUpDownTrapEnable  Default is disabled (2).

   ifConnectorPresent      Set to false (2).

   ifHighSpeed    See [17].

   ifHCInOctets   The 64-bit version of ifInOctets; supported
              if required by the compliance statements in [17].

   ifHCOutOctets  The 64-bit version of ifOutOctets; supported
              if required by the compliance statements in [17].

   ifAlias        The non-volatile 'alias' name for the interface
              as specified by a network manager.

6.  Support of the AAL3/4 Based Interfaces

   For the management of AAL3/4 CPCS layer, see [18].

7.  Support of the AAL5 Managed Objects

   Support of AAL5 managed objects in an ATM switch and ATM host are
   described below.

7.1.  Managing AAL5 in a Switch

   Managing AAL5 in a switch involves:

        (1) performance management of an AAL5 entity as
            an internal resource in a switch

        (2) performance management of AAL5 per virtual connection





Tesink                      Standards Track                    [Page 12]
^L
RFC 2515                 ATM Management Objects            February 1999


   AAL5 in a switch is modeled as shown in Figure 7 and 8.  AAL5 will be
   managed in a switch for only those virtual connections that carry
   AAL5 and are terminated at the AAL5 entity in the switch.  Note that,
   the virtual channels within the ATM UNIs carrying AAL5 will be
   switched by the ATM switching fabric (termed as ATM Entity in the
   figure) to the virtual channels on a proprietary internal interface
   associated with the AAL5 process (termed as AAL5 Entity in the
   figure). Therefore, performance management of the AAL5 resource in
   the switch will be modeled using the ifTable through an internal
   (pseudo-ATM) virtual interface and the AAL5 performance management
   per virtual connection will be supported using an additional AAL5
   connection table in the ATM MIB.  The association between the AAL5
   virtual link at the proprietary virtual, internal interface and the
   ATM virtual link at the ATM interface will be derived from the
   virtual channel cross-connect table and the virtual channel link
   table in the ATM MIB. Note that for the proprietary virtual interface
   the traffic transmit and receive conventions in the virtual channel
   link table are as follows:

      Transmitting traffic:  ATM Entity     --->  AAL5 Entity
      Receiving traffic:     ATM Entity     <---  AAL5 Entity

                 ___________________________
                 |                         |
                 |     =============       |
                 |     |    AAL5   |       |
                 |     |   Entity  |       |
                 |     =============       |
                 |           |             |
                 |         -----Prop. Virtual Interface
                 |           |             |
                 |     =============       |
                 |     |   ATM     |       |
                 |     |  Entity   |       |
                 |     =============       |
                 |_____|__|__|__|__|_______|
                       |  |  |  |  |
                      ---------------- ATM UNIs
                       |  |  |  |  |
                       |  |  |  |  |
                       v  v  v  v  v

         Figure 7: Model of an AAL5 Entity in a Switch








Tesink                      Standards Track                    [Page 13]
^L
RFC 2515                 ATM Management Objects            February 1999


                     __________________
                     |                |
                     |   AAL5         |
                     |________________|
                     |                |
                     | Prop. Virtual  |
                     |  Interface     |
                     |________________|

        Figure 8: AAL5 Entity's Interface Stack in a Switch

7.2.  Managing AAL5 in a Host

   Managing AAL5 in a host involves managing the AAL5 sublayer interface
   as shown in Figure 9 and 10.  The AAL5 sublayer is stacked directly
   over the ATM sublayer.  The ifTable is applied to the AAL5 sublayer
   as defined in Section 10.3.

                 ___________________________
                 |                         |
                 |     =============       |
                 |     |    AAL5   |       |
                 |     |   Entity  |       |
                 |     =============       |
                 |     |   ATM     |       |
                 |     |  Entity   |       |
                 |     =============       |
                 |___________|_____________|
                             |
                           __|__ ATM UNI
                             |
                             |
                             v

         Figure 9: Model of an AAL5 Entity in a Host

                     __________________
                     |                |
                     |   AAL5         |
                     |________________|
                     |                |
                     |   ATM Layer    |
                     |________________|
                     |                |
                     |  Physical Layer|
                     |________________|

          Figure 10: AAL5 Entity's Interface Stack in a Host



Tesink                      Standards Track                    [Page 14]
^L
RFC 2515                 ATM Management Objects            February 1999


7.3.  Support of AAL5 by ifTable

   The AAL5 entity in an ATM device (e.g., switch or host) is managed
   using the ifTable.  There are additional counters specified for AAL5
   than those specified in the ATM B-ICI document [21].  Specific
   interpretations of ifTable for the AAL5 CPCS layer are as follows.

   Object   Use for AAL5 CPCS layer entity
   ======   ==============================

   ifIndex  Each AAL5 entity is represented by an ifEntry.

   ifDescr  Description of the AAL5 entity.

   ifType   The value that is allocated for AAL5 is 49.

   ifMtu    Set to the largest PDU size for the
            AAL5 CPCS layer that can be processed
            by the AAL5 entity.

   ifSpeed  Set to 0.

   ifPhysAddress   An octet string of zero length.

   ifAdminStatus   See [17].

   ifOperStatus    Assumes the value down(2) if the AAL5
            layer is down.

   ifLastChange    See [17].

   ifInOctets      The number of received AAL5 CPCS PDU octets.

   ifOutOctets     The number of AAL5 CPCS PDU octets
            transmitted.

   ifInUcastPkts   The number of received AAL5 CPCS PDUs passed
            to a higher-layer.

   ifOutUcastPkts  The number of AAL5 CPCS PDUs received from a
            higher-layer for transmission.
            [Note:  The number of AAL5 PDUs actually
            transmitted is the number received from a
            higher-layer for transmission minus any which
            are counted by ifOutErrors and ifOutDiscards.]






Tesink                      Standards Track                    [Page 15]
^L
RFC 2515                 ATM Management Objects            February 1999


   ifInErrors      Number of errored AAL5 CPCS PDUs received.
            The types of errors counted include  CRC-32 errors,
            SAR time-out errors, and oversized SDU errors.

   ifInUnknownProtos Set to 0.

   ifInDiscards    Number of received AAL5 CPCS PDUs discarded.
            Possible reason may be input buffer overflow.

   ifOutErrors     Number of AAL5 CPCS PDUs that could not
            be transmitted due to errors.

   ifOutDiscards   Number of AAL5 CPCS PDUs received for
            transmission that are discarded.
            Possible reason may be output buffer
            overflow.

   ifInMulticastPkts  Set to 0.

   ifInBroadcastPkts  Set to 0.

   ifOutMulticastPkts Set to 0.

   ifOutBroadcastPkts Set to 0.

   ifName   Textual name (unique on this system) of the
            AAL5 entity or an octet string of zero length.

   ifHighSpeed       Set to 0.

   ifConnectorPresent Set to false (2).

   ifPromiscuousMode Set to false(2).

   ifLinkUpDownTrapEnable     Default is disabled (2).

   ifAlias        The non-volatile 'alias' name for the interface
              as specified by a network manager.

7.4.  Support of Proprietary Virtual Interface by ifTable

   Specific interpretations of ifTable for the proprietary virtual,
   internal interface associated with an AAL5 entity in an ATM switch
   are as follows.







Tesink                      Standards Track                    [Page 16]
^L
RFC 2515                 ATM Management Objects            February 1999


   Object   Use for proprietary virtual, internal interface
            associated with AAL entities
   ======   ===============================================

   ifIndex  Each proprietary virtual, internal interface
            associated with AAL entities is represented by an
            ifEntry.

   ifDescr  Description of the proprietary virtual, internal
            interface associated with AAL entities.

   ifType   The value that is allocated for proprietary
            virtual, internal interface is 53.

   ifSpeed  See [17].  Set to 0 if the speed is not
            known.

   ifPhysAddress   See [17]. An octet string of zero length
            if no address is used for this interface.

   ifAdminStatus   See [17].

   ifOperStatus    See [17].

   ifLastChange    See [17].

   ifName   Textual name (unique on this system) of the
            interface or an octet string of zero length.

   ifHighSpeed     See [17]. Set to 0 if the speed is not known.

   ifConnectorPresent  Set to false (2).

   ifLinkUpDownTrapEnable     Default is disabled (2).

   ifAlias        The non-volatile 'alias' name for the interface
                  as specified by a network manager.

7.5.  AAL5 Connection Performance Statistics Table

   An AAL5 connection table is used to provide AAL5 performance
   information for each AAL5 virtual connection that is terminated at
   the AAL5 entity contained within an ATM switch or host.








Tesink                      Standards Track                    [Page 17]
^L
RFC 2515                 ATM Management Objects            February 1999


8.  ILMI MIBs and the ATM Managed Objects

   The ILMI MIBs are specified by the ATM Forum as a set of several
   MIBs, all currently defined in the ILMI Specification [23]. The ILMI
   protocols and MIBs allow two connected ATM Interface Management
   Entities (IMEs) to exchange bi-directional parameters, mainly to
   facilitate auto-configuration between ATM peer entities.  The support
   of the ATM management functions by the ILMI MIBs and those contained
   in this memo are compared in Table 1.  In this table, "yes" in the
   "ILMI MIBs"  column indicates that the management functions are
   supported by the ILMI MIBs.  The parenthesized numbers in the "This
   memo" column correspond to the sets of tables enumerated in Section
   6.2.

   For that subset of management information which the ILMI MIBs and
   this memo have in common, every effort has been made to retain
   identical semantics and syntax, even though the MIB objects are
   identified using different OBJECT IDENTIFIERs.

                Table 1 - Structuring of ATM Managed Objects
   ______________________________________________________________
                 |                                 |This   |ILMI|
   ATM Mgmt.Inf. |ATM Managed Objects              |memo   |MIBs|
   ______________|_________________________________|_______|____|

   Local Interface Information:
   _____________________________________________________________
   ATM interface:| (1) port identifier             |ATM MIB|    |
   physical layer| (2) physical transmission types |   (1)*|yes |
   configuration | (3) operational status          |MIB II | *  |
                 | (4) administrative status       |       | ** |
                 | (5) last change status          |       |    |
   _____________________________________________________________
   ATM interface:| (1) active VPI/VCI fields       |ATM MIB|    |
   cell layer    | (2) maximum number of VPCs/VCCs |   (1) |yes |
   configuration | (3) configured VPCs/VCCs        |       | ** |
                 | (4) ILMI VPI/VCI values         |       |    |
                 | (5) Neighbor system info        |       |    |
                 | (6) Max. number of VPI/VCI bits |       |yes |
                 | (7) ATM Subscribed Address      |       |    |
   _____________________________________________________________
   ATM interface:|(1) received/transmitted cells   |       |    |
   cell layer    |(2) cells with HEC error         |MIB II |yes |
   performance   |(3) cell header validation errors|       |    |
   _____________________________________________________________






Tesink                      Standards Track                    [Page 18]
^L
RFC 2515                 ATM Management Objects            February 1999


   _____________________________________________________________
   ATM interface:|(1)DS3 PLCP severely errored     |ATM MIB|    |
   PLCP & TC     |   framing seconds               |    (2)|    |
   layer         |(2)DS3 PLCP unavailable seconds  |       |no  |
   performance   |(3)DS3 PLCP alarm state          |       |    |
                 |(4)out of cell delineation events|       |    |
                 |(5)TC alarm state                |       |    |
   _____________________________________________________________
   VP/VC link:   |(1)VPI or VPI/VCI value          |ATM MIB|    |
   configuration |(2)VCL or VPL operational status |  (3,4)|yes |
                 |(3)VCL/VPL administrative status |       |*** |
                 |(4)VCL/VPL last change status    |       |    |
                 |(5)transmit/receive traffic/     |       |    |
                 |   service category parameters   |       |    |
                 |(6)AAL type                      |       |    |
                 |(7)transmit/receive AAL5 SDU size|       |    |
                 |(8)AAL5 encapsulation type       |       |    |
                 |(9)connection topology type      |       |    |
                 |(10)use of call control          |       |    |
   _____________________________________________________________
   VP/VC         |(1)cross-connect identifier      |       |    |
   Cross-connect:|(2)port identifier of one        |       |    |
   configuration |   end                           |       |    |
                 |(3)port identifier of the other  |ATM MIB|    |
                 |   end                           |    (5)|no  |
                 |(4)VPI or VPI/VCI value          |       |    |
                 |   of one end                    |       |    |
                 |(5)VPI or VPI/VCI value of       |       |    |
                 |   the other end                 |       |    |
                 |(6)VC/VP cross-connect           |       |    |
                 |   operational status            |       |    |
                 |(7)VC/VP cross-connect           |       |    |
                 |   administrative status         |       |    |
                 |(8)VC/VP last change status      |       |    |
   _____________________________________________________________
   VCC AAL5 CPCS |(1)PDUs discarded for CRC errors |ATM MIB|    |
   layer:        |(2)PDUs discarded due to         |   (6) |    |
   performance   |   reassembly time out           |       |no  |
                 |(3)PDUs discarded due to large   |       |    |
                 |   SDUs                          |       |    |
   _____________________________________________________________
   AAL5 entity:  |(1)received/transmitted PDUs     |       |    |
                 |(2)PDUs discarded due to         |       |    |
                 |   protocol errors               |MIB II |no  |
                 |(3)a set of configuration/state  |       |    |
                 |   parameters                    |       |    |
   _____________________________________________________________




Tesink                      Standards Track                    [Page 19]
^L
RFC 2515                 ATM Management Objects            February 1999


   *The operational, administrative, and last change status of the ATM
   interface and the physical transmission type shall be supported by
   the interface table in MIB II [16][17].  ILMI does not contain the
   administrative and last change status of the ATM interface.

   ** The ILMI MIB contains read-only objects for various parameters at
   the ATM interface level.

   ***The ILMI MIBs contain local and end-to-end operational status of
   the VPC/VCC segment.  However, it does not contain the VPC/VCC
   administrative and last change status and the VCC AAL information.

9.  Definitions

     ATM-MIB DEFINITIONS ::= BEGIN

     IMPORTS
        MODULE-IDENTITY, OBJECT-TYPE,
        Counter32, Integer32, IpAddress, mib-2
            FROM SNMPv2-SMI
        DisplayString, RowStatus, TruthValue
            FROM SNMPv2-TC
        MODULE-COMPLIANCE, OBJECT-GROUP
            FROM SNMPv2-CONF
        InterfaceIndex, ifIndex
            FROM IF-MIB
        AtmAddr, AtmConnKind, AtmConnCastType,
        AtmServiceCategory, AtmTrafficDescrParamIndex,
        AtmVpIdentifier, AtmVcIdentifier,
        AtmVorXAdminStatus, AtmVorXLastChange,
        AtmVorXOperStatus, atmNoClpNoScr
            FROM ATM-TC-MIB;


     atmMIB MODULE-IDENTITY
          LAST-UPDATED "9810191200Z"
          ORGANIZATION "IETF AToM MIB Working Group"
          CONTACT-INFO
            "          Kaj Tesink
              Postal:  Bellcore
                       331 Newman Springs Road
                       Red Bank, NJ 07701
              Tel:     732-758-5254
              Fax:     732-758-2269
              E-mail:  kaj@bellcore.com"
          DESCRIPTION
           "This is the MIB Module for ATM and AAL5-related
            objects for managing ATM interfaces, ATM virtual



Tesink                      Standards Track                    [Page 20]
^L
RFC 2515                 ATM Management Objects            February 1999


            links, ATM cross-connects, AAL5 entities, and
            and AAL5 connections."
          REVISION      "9810191200Z"
          DESCRIPTION
           "The initial revision of this module was published
            as RFC 1695. Key revisions include:
            o  Textual Conventions and OBJECT IDENTITIES have
               been moved to a separate MIB module.
            o  Applicability of objects to PVCs, SVCs and Soft
               PVCs has been clarified.
            o  DEFVAL clauses have been added.
            o  The relationship of ifIndex values with different
               layers and sublayers related to ATM has been
               clarified.
            o  atmTrafficQosClass has been deprecated
               and replaced with atmServiceCategory.
            o  atmInterfaceCurrentMaxVpiBits and
               atmInterfaceCurrentMaxVciBits have been added with
               a description on their relationship with other
               objects.
            o  atmInterfaceAddressType and atmInterfaceAdminAddress
               have been deprecated and replaced by
               atmInterfaceSubscrAddress.
            o  atmInterfaceTCAlarmState has been clarified.
            o  atmTrafficDescrParamIndexNext has been introduced
               in order to provide a manager a free
               atmTrafficDescrParamIndex value.
            o  The atmTrafficFrameDiscard capability has been added.
            o  A connection topology type (atmVpl/VclCastType) and
               a call control type (atmVpl/VclConnKind) have been
               added.
            o  aal2 has been added to atmVccAalType."
          REVISION      "9406072245Z"
          DESCRIPTION
           "The RFC1695 version of this MIB module."
          ::= { mib-2 37 }


     atmMIBObjects  OBJECT IDENTIFIER ::= {atmMIB 1}

     -- {atmMIBObjects 1} has been moved to a separate
     -- specification [19].


     -- This ATM MIB Module consists of the following tables:
     -- (1) ATM Interface configuration table
     -- (2) ATM Interface DS3 PLCP table
     -- (3) ATM Interface TC Sublayer table



Tesink                      Standards Track                    [Page 21]
^L
RFC 2515                 ATM Management Objects            February 1999


     -- (4) Atm Traffic Descriptor table
     -- (5) ATM Interface VPL configuration table
     -- (6) ATM Interface VCL configuration table
     -- (7) ATM VP Cross Connect table (for PVCs)
     -- (8) ATM VC Cross Connect table (for PVCs)
     -- (9) ATM Interface AAL5 VCC performance statistics
     --     table

     --    ATM Interface Configuration Parameters Table

     -- This table contains ATM specific
     -- configuration information associated with
     -- an ATM interface beyond those
     -- supported using the ifTable.




     atmInterfaceConfTable  OBJECT-TYPE
          SYNTAX         SEQUENCE OF AtmInterfaceConfEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This table contains ATM local interface
            configuration parameters, one entry per ATM
            interface port."
          ::= { atmMIBObjects 2 }

     atmInterfaceConfEntry    OBJECT-TYPE
          SYNTAX         AtmInterfaceConfEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This list contains ATM interface configuration
            parameters and state variables and is indexed
            by ifIndex values of ATM interfaces."
          INDEX { ifIndex }
          ::= { atmInterfaceConfTable  1}

     AtmInterfaceConfEntry    ::= SEQUENCE  {
          atmInterfaceMaxVpcs             INTEGER,
          atmInterfaceMaxVccs             INTEGER,
          atmInterfaceConfVpcs            INTEGER,
          atmInterfaceConfVccs            INTEGER,
          atmInterfaceMaxActiveVpiBits    INTEGER,
          atmInterfaceMaxActiveVciBits    INTEGER,
          atmInterfaceIlmiVpi             AtmVpIdentifier,
          atmInterfaceIlmiVci             AtmVcIdentifier,



Tesink                      Standards Track                    [Page 22]
^L
RFC 2515                 ATM Management Objects            February 1999


          atmInterfaceAddressType         INTEGER,
          atmInterfaceAdminAddress        AtmAddr,
          atmInterfaceMyNeighborIpAddress IpAddress,
          atmInterfaceMyNeighborIfName    DisplayString,
          atmInterfaceCurrentMaxVpiBits   INTEGER,
          atmInterfaceCurrentMaxVciBits   INTEGER,
          atmInterfaceSubscrAddress       AtmAddr
               }


     atmInterfaceMaxVpcs OBJECT-TYPE
          SYNTAX         INTEGER  (0..4096)
          MAX-ACCESS     read-write
          STATUS         current
          DESCRIPTION
           "The maximum number of VPCs (PVPCs and SVPCs)
            supported at this ATM interface. At the ATM UNI,
            the maximum number of VPCs (PVPCs and SVPCs)
            ranges from 0 to 256 only."
          ::= { atmInterfaceConfEntry 1}

     atmInterfaceMaxVccs OBJECT-TYPE
          SYNTAX         INTEGER  (0..65536)
          MAX-ACCESS     read-write
          STATUS         current
          DESCRIPTION
           "The maximum number of VCCs (PVCCs and SVCCs)
            supported at this ATM interface."
          ::= { atmInterfaceConfEntry 2}

     atmInterfaceConfVpcs  OBJECT-TYPE
          SYNTAX         INTEGER  (0..4096)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The number of VPCs (PVPC, Soft PVPC and SVPC)
            currently in use at this ATM interface.  It includes
            the number of PVPCs and Soft PVPCs that are configured
            at the interface, plus the number of SVPCs
            that are currently  established at the
            interface.

            At the ATM UNI, the configured number of
            VPCs (PVPCs and SVPCs) can range from
            0 to 256 only."
          ::= { atmInterfaceConfEntry 3}

     atmInterfaceConfVccs  OBJECT-TYPE



Tesink                      Standards Track                    [Page 23]
^L
RFC 2515                 ATM Management Objects            February 1999


          SYNTAX         INTEGER  (0..65536)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The number of VCCs (PVCC, Soft PVCC and SVCC)
            currently in use at this ATM interface.  It includes
            the number of PVCCs and Soft PVCCs that are configured
            at the interface, plus the number of SVCCs
            that are currently  established at the
            interface."
          ::= { atmInterfaceConfEntry 4}

     atmInterfaceMaxActiveVpiBits  OBJECT-TYPE
          SYNTAX         INTEGER (0..12)
          MAX-ACCESS     read-write
          STATUS         current
          DESCRIPTION
           "The  maximum number of active VPI bits
            configured for use at the ATM interface.
            At the ATM UNI, the maximum number of active
            VPI bits configured for use ranges from
            0 to 8 only."
          ::= { atmInterfaceConfEntry 5}

     atmInterfaceMaxActiveVciBits  OBJECT-TYPE
          SYNTAX         INTEGER (0..16)
          MAX-ACCESS     read-write
          STATUS         current
          DESCRIPTION
           "The maximum number of active VCI bits
            configured for use at this ATM interface."
          ::= { atmInterfaceConfEntry 6}

     atmInterfaceIlmiVpi OBJECT-TYPE
          SYNTAX         AtmVpIdentifier
          MAX-ACCESS     read-write
          STATUS         current
          DESCRIPTION
           "The VPI value of the VCC supporting
            the ILMI at this ATM interface.  If the values of
            atmInterfaceIlmiVpi and atmInterfaceIlmiVci are
            both equal to zero then the ILMI is not
            supported at this ATM interface."
          DEFVAL { 0 }
          ::= { atmInterfaceConfEntry 7}

     atmInterfaceIlmiVci OBJECT-TYPE
          SYNTAX         AtmVcIdentifier



Tesink                      Standards Track                    [Page 24]
^L
RFC 2515                 ATM Management Objects            February 1999


          MAX-ACCESS     read-write
          STATUS         current
          DESCRIPTION
           "The VCI value of the VCC supporting
            the ILMI at this ATM interface.  If the values of
            atmInterfaceIlmiVpi and atmInterfaceIlmiVci are
            both equal to zero then the ILMI is not
            supported at this ATM interface."
          DEFVAL { 16 }
          ::= { atmInterfaceConfEntry 8}

     atmInterfaceAddressType  OBJECT-TYPE
          SYNTAX         INTEGER {
                            private(1),
                            nsapE164(2),
                            nativeE164(3),
                            other(4)
                              }
          MAX-ACCESS     read-only
          STATUS         deprecated
          DESCRIPTION
           "The type of primary ATM address configured
            for use at this ATM interface."
          ::= { atmInterfaceConfEntry 9 }

     --  The atmInterfaceAdminAddress object has been replaced by
     --  atmInterfaceSubscrAddress.

     atmInterfaceAdminAddress OBJECT-TYPE
          SYNTAX         AtmAddr
          MAX-ACCESS     read-only
          STATUS         deprecated
          DESCRIPTION
           "The primary address assigned for administrative purposes,
            for example, an address associated with the
            service provider side of a public network UNI
            (thus, the value of this address corresponds
            with the value of ifPhysAddress at the host side).
            If this interface has no assigned administrative
            address, or when the address used for
            administrative purposes is the same as that used
            for ifPhysAddress, then this is an octet string of
            zero length."
          ::= { atmInterfaceConfEntry 10 }

     atmInterfaceMyNeighborIpAddress OBJECT-TYPE
          SYNTAX         IpAddress
          MAX-ACCESS     read-write



Tesink                      Standards Track                    [Page 25]
^L
RFC 2515                 ATM Management Objects            February 1999


          STATUS         current
          DESCRIPTION
           "The IP address of the neighbor system connected to
            the  far end of this interface, to which a Network
            Management Station can send SNMP messages, as IP
            datagrams sent to UDP port 161, in order to access
            network management information concerning the
            operation of that system.  Note that the value
            of this object may be obtained in different ways,
            e.g., by manual configuration, or through ILMI
            interaction with the neighbor system."
          ::= { atmInterfaceConfEntry 11 }

     atmInterfaceMyNeighborIfName OBJECT-TYPE
          SYNTAX         DisplayString
          MAX-ACCESS     read-write
          STATUS         current
          DESCRIPTION
           "The textual name of the interface on the neighbor
            system on the far end of this interface, and to
            which this interface connects.  If the neighbor
            system is manageable through SNMP and supports
            the object ifName, the value of this object must
            be identical with that of ifName for the ifEntry
            of the lowest level physical interface
            for this port.  If this interface does not have a
            textual name, the value of this object is a zero
            length string.  Note that the value of this object
            may be obtained in different ways, e.g., by manual
            configuration, or through ILMI interaction with
            the neighbor system."
          ::= { atmInterfaceConfEntry 12 }

     atmInterfaceCurrentMaxVpiBits    OBJECT-TYPE
          SYNTAX         INTEGER  (0..12)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The maximum number of VPI Bits that may
            currently be used at this ATM interface.
            The value is the minimum of
            atmInterfaceMaxActiveVpiBits, and the
            atmInterfaceMaxActiveVpiBits of the interface's
            UNI/NNI peer.

            If the interface does not negotiate with
            its peer to determine the number of VPI Bits
            that can be used on the interface, then the



Tesink                      Standards Track                    [Page 26]
^L
RFC 2515                 ATM Management Objects            February 1999


            value of this object must equal
            atmInterfaceMaxActiveVpiBits."
          ::= { atmInterfaceConfEntry 13 }

     atmInterfaceCurrentMaxVciBits    OBJECT-TYPE
          SYNTAX         INTEGER  (0..16)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The maximum number of VCI Bits that may
            currently be used at this ATM interface.
            The value is the minimum of
            atmInterfaceMaxActiveVciBits, and the
            atmInterfaceMaxActiveVciBits of the interface's
            UNI/NNI peer.

            If the interface does not negotiate with
            its peer to determine the number of VCI Bits
            that can be used on the interface, then the
            value of this object must equal
            atmInterfaceMaxActiveVciBits."
          ::= { atmInterfaceConfEntry 14 }

     atmInterfaceSubscrAddress OBJECT-TYPE
          SYNTAX         AtmAddr
          MAX-ACCESS     read-write
          STATUS         current
          DESCRIPTION
           "The identifier assigned by a service provider
            to the network side of a public network UNI.
            If this interface has no assigned service provider
            address, or for other interfaces this is an octet string
            of zero length."
          ::= { atmInterfaceConfEntry 15 }

     -- The ATM Interface DS3 PLCP Table

     -- This table contains the DS3 PLCP configuration and
     -- state parameters of those ATM interfaces
     -- which use DS3 PLCP for carrying ATM cells over DS3.

     atmInterfaceDs3PlcpTable  OBJECT-TYPE
          SYNTAX       SEQUENCE OF AtmInterfaceDs3PlcpEntry
          MAX-ACCESS   not-accessible
          STATUS       current
          DESCRIPTION
           "This table contains ATM interface DS3 PLCP
            parameters and state variables, one entry per



Tesink                      Standards Track                    [Page 27]
^L
RFC 2515                 ATM Management Objects            February 1999


            ATM interface port."
          ::= { atmMIBObjects 3}

     atmInterfaceDs3PlcpEntry OBJECT-TYPE
          SYNTAX         AtmInterfaceDs3PlcpEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This list contains DS3 PLCP parameters and
            state variables at the ATM interface and is
            indexed by the ifIndex value of the ATM interface."
          INDEX    { ifIndex }
          ::= { atmInterfaceDs3PlcpTable 1}

     AtmInterfaceDs3PlcpEntry    ::= SEQUENCE  {
          atmInterfaceDs3PlcpSEFSs       Counter32,
          atmInterfaceDs3PlcpAlarmState  INTEGER,
          atmInterfaceDs3PlcpUASs        Counter32
            }


     atmInterfaceDs3PlcpSEFSs  OBJECT-TYPE
          SYNTAX         Counter32
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The number of DS3 PLCP Severely Errored Framing
            Seconds (SEFS). Each SEFS represents a
            one-second interval which contains
            one or more SEF events."
          ::= { atmInterfaceDs3PlcpEntry 1}

     atmInterfaceDs3PlcpAlarmState    OBJECT-TYPE
          SYNTAX         INTEGER {
                            noAlarm(1),
                            receivedFarEndAlarm(2),
                            incomingLOF(3)
                                 }
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "This variable indicates if there is an
            alarm present for the DS3 PLCP.  The value
            receivedFarEndAlarm means that the DS3 PLCP
            has received an incoming Yellow
            Signal, the value incomingLOF means that
            the DS3 PLCP has declared a loss of frame (LOF)
            failure condition, and the value noAlarm



Tesink                      Standards Track                    [Page 28]
^L
RFC 2515                 ATM Management Objects            February 1999


            means that there are no alarms present.
            Transition from the failure to the no alarm state
            occurs when no defects (e.g., LOF) are received
            for more than 10 seconds."
          ::= { atmInterfaceDs3PlcpEntry 2}

     atmInterfaceDs3PlcpUASs  OBJECT-TYPE
          SYNTAX         Counter32
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The counter associated with the number of
            Unavailable Seconds encountered by the PLCP."
          ::= { atmInterfaceDs3PlcpEntry 3}


     -- The ATM Interface TC Sublayer Table

     -- This table contains TC sublayer configuration and
     -- state parameters of those ATM interfaces
     -- which use TC sublayer for carrying ATM cells over
     -- SONET/SDH or DS3.


     atmInterfaceTCTable  OBJECT-TYPE
          SYNTAX         SEQUENCE OF AtmInterfaceTCEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This table contains ATM interface TC
            Sublayer parameters and state variables,
            one entry per ATM interface port."
          ::= { atmMIBObjects 4}

     atmInterfaceTCEntry OBJECT-TYPE
          SYNTAX         AtmInterfaceTCEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This list contains TC Sublayer parameters
            and state variables at the ATM interface and is
            indexed by the ifIndex value of the ATM interface."
          INDEX  {ifIndex }
          ::= { atmInterfaceTCTable 1}

     AtmInterfaceTCEntry    ::= SEQUENCE  {
          atmInterfaceOCDEvents      Counter32,
          atmInterfaceTCAlarmState   INTEGER



Tesink                      Standards Track                    [Page 29]
^L
RFC 2515                 ATM Management Objects            February 1999


            }

     atmInterfaceOCDEvents  OBJECT-TYPE
          SYNTAX         Counter32
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The number of times the Out of Cell
            Delineation (OCD) events occur.  If seven
            consecutive ATM cells have Header Error
            Control (HEC) violations, an OCD event occurs.
            A high number of OCD events may indicate a
            problem with the TC Sublayer."
          ::= { atmInterfaceTCEntry 1}


     atmInterfaceTCAlarmState    OBJECT-TYPE
          SYNTAX         INTEGER {
                            noAlarm(1),
                            lcdFailure(2)
                                  }
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "This variable indicates if there is an
            alarm present for the TC Sublayer.  The value
            lcdFailure(2) indicates that the TC Sublayer
            is currently in the Loss of Cell Delineation
            (LCD) defect maintenance state.  The value
            noAlarm(1) indicates that the TC Sublayer
            is currently not in the LCD defect
            maintenance state."
           ::= { atmInterfaceTCEntry 2}

     --  ATM Traffic Descriptor Parameter Table

     -- This table contains a set of self-consistent
     -- ATM traffic parameters including the
     -- ATM traffic service category.

     -- The ATM virtual link tables (i.e., VPL and VCL tables)
     -- will use this ATM Traffic Descriptor table
     -- to assign traffic parameters and service category
     -- to the receive and transmit directions of
     -- the ATM virtual links (i.e., VPLs and VCLs).
     -- The ATM VPL or VCL table will indicate a row
     -- in the atmTrafficDescrParamTable
     -- using its atmTrafficDescrParamIndex value.



Tesink                      Standards Track                    [Page 30]
^L
RFC 2515                 ATM Management Objects            February 1999


     -- The management application can then compare a set of
     -- ATM traffic parameters with a single value.

     -- If no suitable row(s) in the atmTrafficDescrParamTable
     -- exists, the manager must create a new row(s) in this
     -- table. If such a row is created, agent checks the
     -- sanity of that set of ATM traffic parameter values.

     -- The manager may use atmTrafficDescrParamIndexNext
     -- in order to obtain a free atmTrafficDescrParamIndex
     -- value.

     -- When creating a new row, the parameter values
     -- will be checked for self-consistency.
     -- Predefined/template rows may be supported.

     -- A row in the atmTrafficDescrParamTable is deleted
     -- by setting the atmTrafficDescrRowStatus to destroy(6).
     -- The agent will check whether this row is still in use
     -- by any entry of the atmVplTable or atmVclTable.
     -- The agent denies the request if the row is still in
     -- use.

     --  The ATM Traffic Descriptor Parameter Table


     atmTrafficDescrParamTable    OBJECT-TYPE
          SYNTAX       SEQUENCE OF AtmTrafficDescrParamEntry
          MAX-ACCESS   not-accessible
          STATUS       current
          DESCRIPTION
           "This table contains information on ATM traffic
            descriptor type and the associated parameters."
          ::= { atmMIBObjects 5}

     atmTrafficDescrParamEntry    OBJECT-TYPE
          SYNTAX         AtmTrafficDescrParamEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This list contains ATM traffic descriptor
            type and the associated parameters."
          INDEX  {atmTrafficDescrParamIndex}
          ::= { atmTrafficDescrParamTable 1}

     AtmTrafficDescrParamEntry   ::= SEQUENCE  {
       atmTrafficDescrParamIndex  AtmTrafficDescrParamIndex,
       atmTrafficDescrType        OBJECT IDENTIFIER,



Tesink                      Standards Track                    [Page 31]
^L
RFC 2515                 ATM Management Objects            February 1999


       atmTrafficDescrParam1      Integer32,
       atmTrafficDescrParam2      Integer32,
       atmTrafficDescrParam3      Integer32,
       atmTrafficDescrParam4      Integer32,
       atmTrafficDescrParam5      Integer32,
       atmTrafficQoSClass         INTEGER,
       atmTrafficDescrRowStatus   RowStatus,
       atmServiceCategory         AtmServiceCategory,
       atmTrafficFrameDiscard     TruthValue
                    }

     atmTrafficDescrParamIndex OBJECT-TYPE
          SYNTAX  AtmTrafficDescrParamIndex (1..2147483647)
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This object is used by the virtual link
            table (i.e., VPL or VCL table)
            to identify the row of this table.
            When creating a new row in the table
            the value of this index may be obtained
            by retrieving the value of
            atmTrafficDescrParamIndexNext."
          ::= { atmTrafficDescrParamEntry  1}

     atmTrafficDescrType OBJECT-TYPE
          SYNTAX         OBJECT IDENTIFIER
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The value of this object identifies the type
            of ATM traffic descriptor.
            The type may indicate no traffic descriptor or
            traffic descriptor with one or more parameters.
            These parameters are specified as a parameter
            vector, in the corresponding instances of the
            objects:
                atmTrafficDescrParam1
                atmTrafficDescrParam2
                atmTrafficDescrParam3
                atmTrafficDescrParam4
                atmTrafficDescrParam5."
           DEFVAL  { atmNoClpNoScr }
           ::= { atmTrafficDescrParamEntry 2}

     atmTrafficDescrParam1 OBJECT-TYPE
          SYNTAX         Integer32
          MAX-ACCESS     read-create



Tesink                      Standards Track                    [Page 32]
^L
RFC 2515                 ATM Management Objects            February 1999


          STATUS         current
          DESCRIPTION
           "The first parameter of the ATM traffic descriptor
            used according to the value of
            atmTrafficDescrType."
          DEFVAL  { 0 }
          ::= { atmTrafficDescrParamEntry 3}

     atmTrafficDescrParam2 OBJECT-TYPE
          SYNTAX         Integer32
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The second parameter of the ATM traffic descriptor
            used according to the value of
            atmTrafficDescrType."
          DEFVAL  { 0 }
          ::= { atmTrafficDescrParamEntry 4}

     atmTrafficDescrParam3 OBJECT-TYPE
          SYNTAX         Integer32
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The third parameter of the ATM traffic descriptor
            used according to the value of
            atmTrafficDescrType."
          DEFVAL  { 0 }
          ::= { atmTrafficDescrParamEntry 5}

     atmTrafficDescrParam4 OBJECT-TYPE
          SYNTAX         Integer32
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The fourth parameter of the ATM traffic descriptor
            used according to the value of
            atmTrafficDescrType."
          DEFVAL  { 0 }
          ::= { atmTrafficDescrParamEntry 6}

     atmTrafficDescrParam5 OBJECT-TYPE
          SYNTAX         Integer32
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The fifth parameter of the ATM traffic descriptor
            used according to the value of



Tesink                      Standards Track                    [Page 33]
^L
RFC 2515                 ATM Management Objects            February 1999


            atmTrafficDescrType."
          DEFVAL  { 0 }
          ::= { atmTrafficDescrParamEntry 7}

     atmTrafficQoSClass  OBJECT-TYPE
          SYNTAX         INTEGER (0..255)
          MAX-ACCESS     read-create
          STATUS         deprecated
          DESCRIPTION
           "The value of this object identifies the QoS Class.
            Four Service classes have been
            specified in the ATM Forum UNI Specification:
            Service Class A: Constant bit rate video and
                             Circuit emulation
            Service Class B: Variable bit rate video/audio
            Service Class C: Connection-oriented data
            Service Class D: Connectionless data
            Four QoS classes numbered 1, 2, 3, and 4 have
            been specified with the aim to support service
            classes A, B, C, and D respectively.
            An unspecified QoS Class numbered `0' is used
            for best effort traffic."
          DEFVAL  { 0 }
          ::= { atmTrafficDescrParamEntry 8}

     atmTrafficDescrRowStatus  OBJECT-TYPE
          SYNTAX         RowStatus
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "This object is used to create
            a new row or modify or delete an
            existing row in this table."
          DEFVAL  { active }
          ::= {atmTrafficDescrParamEntry 9}

     atmServiceCategory  OBJECT-TYPE
          SYNTAX         AtmServiceCategory
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The ATM service category."
          DEFVAL  { ubr }
          ::= { atmTrafficDescrParamEntry 10}


     atmTrafficFrameDiscard    OBJECT-TYPE
          SYNTAX       TruthValue



Tesink                      Standards Track                    [Page 34]
^L
RFC 2515                 ATM Management Objects            February 1999


          MAX-ACCESS   read-create
          STATUS       current
          DESCRIPTION
           "If set to 'true', this object indicates that the network
            is requested to treat data for this connection, in the
            given direction, as frames (e.g. AAL5 CPCS_PDU's) rather
            than as individual cells.  While the precise
            implementation is network-specific, this treatment may
            for example involve discarding entire frames during
            congestion, rather than a few cells from many frames."
          DEFVAL { true }
          ::= { atmTrafficDescrParamEntry 11 }

     --  ATM Interface Virtual Path Link (VPL) Table

     -- This table contains configuration and state
     -- information of a bi-directional Virtual Path Link
     -- (VPL)

     -- This table can be used to create, delete or modify
     -- a VPL that is terminated in an ATM host or switch.
     -- This table can also be used to create, delete or
     -- modify a VPL which is cross-connected to another
     -- VPL.

     -- In the example below, the traffic flows on the receive
     -- and transmit directions of the VPLs are characterized
     -- by atmVplReceiveTrafficDescrIndex and
     -- atmVplTransmitTrafficDescrIndex respectively.
     -- The cross-connected VPLs are identified by
     -- atmVplCrossConnectIdentifier.



     --           ________________________________
     --           |                              |
     --  VPL      | ATM Host, Switch, or Network |   VPL
     -- receive   |                              |  receive
     -- ========> X                              X <=======
     -- <======== X                              X ========>
     -- transmit  |                              |  transmit
     --           |______________________________|



     --  The ATM Interface VPL Table





Tesink                      Standards Track                    [Page 35]
^L
RFC 2515                 ATM Management Objects            February 1999


     atmVplTable         OBJECT-TYPE
          SYNTAX         SEQUENCE OF AtmVplEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The Virtual Path Link (VPL) table.  A
            bi-directional VPL is modeled as one entry
            in this table. This table can be used for
            PVCs, SVCs and Soft PVCs.
            Entries are not present in this table for
            the VPIs used by entries in the atmVclTable."
          ::= { atmMIBObjects 6}

     atmVplEntry         OBJECT-TYPE
          SYNTAX         AtmVplEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "An entry in the VPL table.  This entry is
            used to model a bi-directional VPL.
            To create a VPL at an ATM interface,
            either of the following procedures are used:

            Negotiated VPL establishment

          (1) The management application creates
              a VPL entry in the atmVplTable
              by setting atmVplRowStatus to createAndWait(5).
              This may fail for the following reasons:
              - The selected VPI value is unavailable,
              - The selected VPI value is in use.
              Otherwise, the agent creates a row and
              reserves the VPI value on that port.

          (2) The manager selects an existing row(s) in the
              atmTrafficDescrParamTable,
              thereby, selecting a set of self-consistent
              ATM traffic parameters and the service category
              for receive and transmit directions of the VPL.

         (2a) If no suitable row(s) in the
              atmTrafficDescrParamTable exists,
              the manager must create a new row(s)
              in that table.

         (2b) The manager characterizes the VPL's traffic
              parameters through setting the
              atmVplReceiveTrafficDescrIndex and the



Tesink                      Standards Track                    [Page 36]
^L
RFC 2515                 ATM Management Objects            February 1999


              atmVplTransmitTrafficDescrIndex values
              in the VPL table, which point to the rows
              containing desired ATM traffic parameter values
              in the atmTrafficDescrParamTable.  The agent
              will check the availability of resources and
              may refuse the request.
              If the transmit and receive service categories
              are inconsistent, the agent should refuse the
              request.

          (3) The manager activates the VPL by setting the
              the atmVplRowStatus to active(1).
              If this set is successful, the agent has
              reserved the resources to satisfy the requested
              traffic parameter values and the service category
              for that VPL.

          (4) If the VPL terminates a VPC in the ATM host
              or switch, the manager turns on the
              atmVplAdminStatus to up(1) to turn the VPL
              traffic flow on.  Otherwise, the
              atmVpCrossConnectTable  must be used
              to cross-connect the VPL to another VPL(s)
              in an ATM switch or network.

            One-Shot VPL Establishment

            A VPL may also be established in one step by a
            set-request with all necessary VPL parameter
            values and atmVplRowStatus set to createAndGo(4).

            In contrast to the negotiated VPL establishment
            which allows for detailed error checking
            (i.e., set errors are explicitly linked to
            particular resource acquisition failures),
            the one-shot VPL establishment
            performs the setup on one operation but
            does not have the advantage of step-wise
            error checking.

            VPL Retirement

            A VPL is released by setting atmVplRowStatus to
            destroy(6), and the agent may release all
            associated resources."
          INDEX  {ifIndex, atmVplVpi }
          ::= { atmVplTable  1}




Tesink                      Standards Track                    [Page 37]
^L
RFC 2515                 ATM Management Objects            February 1999


     AtmVplEntry    ::= SEQUENCE  {
          atmVplVpi          AtmVpIdentifier,
          atmVplAdminStatus  AtmVorXAdminStatus,
          atmVplOperStatus   AtmVorXOperStatus,
          atmVplLastChange   AtmVorXLastChange,
          atmVplReceiveTrafficDescrIndex
                         AtmTrafficDescrParamIndex,
          atmVplTransmitTrafficDescrIndex
                         AtmTrafficDescrParamIndex,
          atmVplCrossConnectIdentifier INTEGER,
          atmVplRowStatus    RowStatus,
          atmVplCastType     AtmConnCastType,
          atmVplConnKind     AtmConnKind
             }


     atmVplVpi           OBJECT-TYPE
          SYNTAX         AtmVpIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VPI value of the VPL."
          ::= { atmVplEntry 1}

     atmVplAdminStatus   OBJECT-TYPE
          SYNTAX         AtmVorXAdminStatus
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "This object is instanciated only for a VPL
            which terminates a VPC (i.e., one which is
            NOT cross-connected to other VPLs).
            Its value specifies the desired
            administrative state of the VPL."
          DEFVAL { down }
          ::= { atmVplEntry 2}

     atmVplOperStatus    OBJECT-TYPE
          SYNTAX         AtmVorXOperStatus
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The current operational status of the VPL."
          ::= { atmVplEntry 3}

     atmVplLastChange    OBJECT-TYPE
          SYNTAX         AtmVorXLastChange
          MAX-ACCESS     read-only



Tesink                      Standards Track                    [Page 38]
^L
RFC 2515                 ATM Management Objects            February 1999


          STATUS         current
          DESCRIPTION
           "The value of sysUpTime at the time this
            VPL entered its current operational state."
          ::= { atmVplEntry 4 }

     atmVplReceiveTrafficDescrIndex  OBJECT-TYPE
          SYNTAX         AtmTrafficDescrParamIndex
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The value of this object identifies the row
            in the atmTrafficDescrParamTable which
            applies to the receive direction of the VPL."
          DEFVAL { 0 }
           ::= { atmVplEntry 5}

     atmVplTransmitTrafficDescrIndex  OBJECT-TYPE
          SYNTAX         AtmTrafficDescrParamIndex
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The value of this object identifies the row
            in the atmTrafficDescrParamTable which
            applies to the transmit direction of the VPL."
          DEFVAL { 0 }
           ::= { atmVplEntry 6}

     atmVplCrossConnectIdentifier   OBJECT-TYPE
          SYNTAX         INTEGER (0..2147483647)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "This object is instantiated only for a VPL
            which is cross-connected to other VPLs
            that belong to the same VPC.  All such
            associated VPLs have the same value of this
            object, and all their cross-connections are
            identified either by entries that are indexed
            by the same value of atmVpCrossConnectIndex in
            the atmVpCrossConnectTable of this MIB module or by
            the same value of the cross-connect index in
            the cross-connect table for SVCs and Soft PVCs
            (defined in a separate MIB module).
            At no time should entries in these respective
            cross-connect tables exist simultaneously
            with the same cross-connect index value.




Tesink                      Standards Track                    [Page 39]
^L
RFC 2515                 ATM Management Objects            February 1999


            The value of this object is initialized by the
            agent after the associated entries in the
            atmVpCrossConnectTable have been created."
          ::= {atmVplEntry 7}

     atmVplRowStatus     OBJECT-TYPE
          SYNTAX         RowStatus
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "This object is used to create, delete
            or modify a row in this table.
            To create a new VCL, this object is
            initially set to 'createAndWait' or
            'createAndGo'.  This object should not be
            set to 'active' unless the following columnar
            objects have been set to their desired value
            in this row:
            atmVplReceiveTrafficDescrIndex and
            atmVplTransmitTrafficDescrIndex.
            The DESCRIPTION of atmVplEntry provides
            further guidance to row treatment in this table."
          DEFVAL { createAndWait }
          ::= {atmVplEntry 8}

     atmVplCastType      OBJECT-TYPE
          SYNTAX         AtmConnCastType
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The connection topology type."
          DEFVAL { p2p }
          ::= {atmVplEntry 9}

     atmVplConnKind      OBJECT-TYPE
          SYNTAX         AtmConnKind
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The use of call control."
          DEFVAL { pvc }
          ::= {atmVplEntry 10}

     --  ATM Interface Virtual Channel Link (VCL) Table

     -- This table contains configuration and state
     -- information of a bi-directional Virtual Channel
     -- Link (VCL) at an ATM interface.



Tesink                      Standards Track                    [Page 40]
^L
RFC 2515                 ATM Management Objects            February 1999


     -- This table can be used to create, delete or modify
     -- a VCL that is terminated in an ATM host or switch.
     -- This table can also be
     -- used to create, delete or modify a VCL that is
     -- cross-connected to another VCL.


     --  The ATM Interface VCL Table


     atmVclTable         OBJECT-TYPE
          SYNTAX         SEQUENCE OF AtmVclEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The Virtual Channel Link (VCL) table.  A
            bi-directional VCL is modeled as one entry
            in this table. This table can be used for
            PVCs, SVCs and Soft PVCs."
          ::= { atmMIBObjects 7}

     atmVclEntry         OBJECT-TYPE
          SYNTAX         AtmVclEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "An entry in the VCL table. This entry is
            used to model a bi-directional VCL.
            To create a VCL at an ATM interface,
            either of the following procedures are used:

            Negotiated VCL establishment

          (1) The management application creates
              a VCL entry in the atmVclTable
              by setting atmVclRowStatus to createAndWait(5).
              This may fail for the following reasons:
              - The selected VPI/VCI values are unavailable,
              - The selected VPI/VCI values are in use.
              Otherwise, the agent creates a row and
              reserves the VPI/VCI values on that port.

          (2) The manager selects an existing row(s) in the
              atmTrafficDescrParamTable,
              thereby, selecting a set of self-consistent
              ATM traffic parameters and the service category
              for receive and transmit directions of the VCL.




Tesink                      Standards Track                    [Page 41]
^L
RFC 2515                 ATM Management Objects            February 1999


         (2a) If no suitable row(s) in the
              atmTrafficDescrParamTable exists,
              the manager must create a new row(s)
              in that table.

         (2b) The manager characterizes the VCL's traffic
              parameters through setting the
              atmVclReceiveTrafficDescrIndex and the
              atmVclTransmitTrafficDescrIndex values
              in the VCL table, which point to the rows
              containing desired ATM traffic parameter values
              in the atmTrafficDescrParamTable.  The agent
              will check the availability of resources and
              may refuse the request.
              If the transmit and receive service categories
              are inconsistent, the agent should refuse the
              request.

          (3) The manager activates the VCL by setting the
              the atmVclRowStatus to active(1) (for
              requirements on this activation see the
              description of atmVclRowStatus).
              If this set is successful, the agent has
              reserved the resources to satisfy the requested
              traffic parameter values and the service category
              for that VCL.
          (4) If the VCL terminates a VCC in the ATM host
              or switch, the manager turns on the
              atmVclAdminStatus to up(1) to turn the VCL
              traffic flow on.  Otherwise, the
              atmVcCrossConnectTable  must be used
              to cross-connect the VCL to another VCL(s)
              in an ATM switch or network.

           One-Shot VCL Establishment

           A VCL may also be established in one step by a
           set-request with all necessary VCL parameter
           values and atmVclRowStatus set to createAndGo(4).

           In contrast to the negotiated VCL establishment
           which allows for detailed error checking
           (i.e., set errors are explicitly linked to
           particular resource acquisition failures),
           the one-shot VCL establishment
           performs the setup on one operation but
           does not have the advantage of step-wise
           error checking.



Tesink                      Standards Track                    [Page 42]
^L
RFC 2515                 ATM Management Objects            February 1999


           VCL Retirement

           A VCL is released by setting atmVclRowStatus to
           destroy(6), and the agent may release all
           associated resources."
          INDEX  {ifIndex, atmVclVpi, atmVclVci }
          ::= { atmVclTable  1}

     AtmVclEntry    ::= SEQUENCE  {
          atmVclVpi                     AtmVpIdentifier,
          atmVclVci                     AtmVcIdentifier,
          atmVclAdminStatus             AtmVorXAdminStatus,
          atmVclOperStatus              AtmVorXOperStatus,
          atmVclLastChange              AtmVorXLastChange,
          atmVclReceiveTrafficDescrIndex
                                AtmTrafficDescrParamIndex,
          atmVclTransmitTrafficDescrIndex
                                AtmTrafficDescrParamIndex,
          atmVccAalType                 INTEGER,
          atmVccAal5CpcsTransmitSduSize INTEGER,
          atmVccAal5CpcsReceiveSduSize  INTEGER,
          atmVccAal5EncapsType          INTEGER,
          atmVclCrossConnectIdentifier  INTEGER,
          atmVclRowStatus               RowStatus,
          atmVclCastType                AtmConnCastType,
          atmVclConnKind                AtmConnKind
                 }

     atmVclVpi           OBJECT-TYPE
          SYNTAX         AtmVpIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VPI value of the VCL."
          ::= { atmVclEntry 1}

     atmVclVci           OBJECT-TYPE
          SYNTAX         AtmVcIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VCI value of the VCL."
          ::= { atmVclEntry 2}

     atmVclAdminStatus   OBJECT-TYPE
          SYNTAX         AtmVorXAdminStatus
          MAX-ACCESS     read-create
          STATUS         current



Tesink                      Standards Track                    [Page 43]
^L
RFC 2515                 ATM Management Objects            February 1999


          DESCRIPTION
           "This object is instanciated only for a VCL which
            terminates a VCC (i.e., one which is NOT
            cross-connected to other VCLs). Its value
            specifies the desired administrative state of
            the VCL."
          DEFVAL { down }
          ::= { atmVclEntry 3}

     atmVclOperStatus    OBJECT-TYPE
          SYNTAX         AtmVorXOperStatus
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The current operational status of the VCL."
          ::= { atmVclEntry 4}

     atmVclLastChange    OBJECT-TYPE
          SYNTAX         AtmVorXLastChange
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The value of sysUpTime at the time this VCL
            entered its current operational state."
          ::= { atmVclEntry 5 }

     atmVclReceiveTrafficDescrIndex  OBJECT-TYPE
          SYNTAX         AtmTrafficDescrParamIndex
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The value of this object identifies the row
            in the ATM Traffic Descriptor Table which
            applies to the receive direction of this VCL."
          DEFVAL { 0 }
           ::= { atmVclEntry 6}

     atmVclTransmitTrafficDescrIndex  OBJECT-TYPE
          SYNTAX         AtmTrafficDescrParamIndex
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The value of this object identifies the row
            of the ATM Traffic Descriptor Table which applies
            to the transmit direction of this VCL."
          DEFVAL { 0 }
           ::= { atmVclEntry 7}




Tesink                      Standards Track                    [Page 44]
^L
RFC 2515                 ATM Management Objects            February 1999


     atmVccAalType       OBJECT-TYPE
          SYNTAX         INTEGER {
                            aal1(1),
                            aal34(2),
                            aal5(3),
                            other(4),
                            unknown(5),
                            aal2(6)
                              }
          MAX-ACCESS    read-create
          STATUS        current
          DESCRIPTION
           "An instance of this object only exists when the
            local VCL end-point is also the VCC end-point,
            and AAL is in use.
            The type of AAL used on this VCC.
            The AAL type includes AAL1, AAL2, AAL3/4,
            and AAL5. The other(4) may be user-defined
            AAL type.  The unknown type indicates that
            the AAL type cannot be determined."
          DEFVAL { aal5 }
          ::= { atmVclEntry 8 }

     atmVccAal5CpcsTransmitSduSize OBJECT-TYPE
          SYNTAX         INTEGER (1..65535)
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "An instance of this object only exists when the
            local VCL end-point is also the VCC end-point,
            and AAL5 is in use.
            The maximum AAL5 CPCS SDU size in octets that is
            supported on the transmit direction of this VCC."
          DEFVAL { 9188 }
                ::= { atmVclEntry 9 }

     atmVccAal5CpcsReceiveSduSize OBJECT-TYPE
          SYNTAX         INTEGER (1..65535)
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "An instance of this object only exists when the
            local VCL end-point is also the VCC end-point,
            and AAL5 is in use.
            The maximum AAL5 CPCS SDU size in octets that is
            supported on the receive direction of this VCC."
          DEFVAL { 9188 }
                ::= { atmVclEntry 10 }



Tesink                      Standards Track                    [Page 45]
^L
RFC 2515                 ATM Management Objects            February 1999


     atmVccAal5EncapsType  OBJECT-TYPE
          SYNTAX         INTEGER {
                         vcMultiplexRoutedProtocol(1),
                         vcMultiplexBridgedProtocol8023(2),
                         vcMultiplexBridgedProtocol8025(3),
                         vcMultiplexBridgedProtocol8026(4),
                         vcMultiplexLANemulation8023(5),
                         vcMultiplexLANemulation8025(6),
                         llcEncapsulation(7),
                         multiprotocolFrameRelaySscs(8),
                         other(9),
                         unknown(10)
                            }
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "An instance of this object only exists when the
            local VCL end-point is also the VCC end-point,
            and AAL5 is in use.
            The type of data encapsulation used over
            the AAL5 SSCS layer. The definitions reference
            RFC 1483 Multiprotocol Encapsulation
            over ATM AAL5 and to the ATM Forum
            LAN Emulation specification."
          DEFVAL { llcEncapsulation }
                ::= { atmVclEntry 11 }

     atmVclCrossConnectIdentifier   OBJECT-TYPE
          SYNTAX         INTEGER (0..2147483647)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "This object is instantiated only for a VCL
            which is cross-connected to other VCLs
            that belong to the same VCC.  All such
            associated VCLs have the same value of this
            object, and all their cross-connections are
            identified either by entries that are indexed
            by the same value of atmVcCrossConnectIndex in
            the atmVcCrossConnectTable of this MIB module or by
            the same value of the cross-connect index in
            the cross-connect table for SVCs and Soft PVCs
            (defined in a separate MIB module).

            At no time should entries in these respective
            cross-connect tables exist simultaneously
            with the same cross-connect index value.




Tesink                      Standards Track                    [Page 46]
^L
RFC 2515                 ATM Management Objects            February 1999


            The value of this object is initialized by the
            agent after the associated entries in the
            atmVcCrossConnectTable have been created."
          ::= {atmVclEntry 12}

     atmVclRowStatus     OBJECT-TYPE
          SYNTAX         RowStatus
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "This object is used to create, delete or
            modify a row in this table.  To create
            a new VCL, this object is initially set
            to 'createAndWait' or 'createAndGo'.
            This object should not be
            set to 'active' unless the following columnar
            objects have been set to their desired value
            in this row:
            atmVclReceiveTrafficDescrIndex,
            atmVclTransmitTrafficDescrIndex.
            In addition, if the local VCL end-point
            is also the VCC end-point:
            atmVccAalType.
            In addition, for AAL5 connections only:
            atmVccAal5CpcsTransmitSduSize,
            atmVccAal5CpcsReceiveSduSize, and
            atmVccAal5EncapsType. (The existence
            of these objects imply the AAL connection type.).
            The DESCRIPTION of atmVclEntry provides
            further guidance to row treatment in this table."
          DEFVAL { createAndWait }
                ::= {atmVclEntry 13}

     atmVclCastType      OBJECT-TYPE
          SYNTAX         AtmConnCastType
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The connection topology type."
          DEFVAL { p2p }
                ::= {atmVclEntry 14}


     atmVclConnKind      OBJECT-TYPE
          SYNTAX         AtmConnKind
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION



Tesink                      Standards Track                    [Page 47]
^L
RFC 2515                 ATM Management Objects            February 1999


           "The use of call control."
          DEFVAL { pvc }
          ::= {atmVclEntry 15}


     --     ATM Virtual Path (VP) Cross Connect Table

     -- This table contains configuration and state
     -- information of point-to-point,
     -- point-to-multipoint, or multipoint-to-multipoint
     -- VP cross-connects for PVCs.

     -- This table has read-create access and can be used
     -- to cross-connect the VPLs together in an ATM switch
     -- or network. The atmVpCrossConnectIndex
     -- is used to associate the related
     -- VPLs that are cross-connected together.

     -- The ATM VP Cross Connect Table
     -- models each bi-directional VPC
     -- cross-connect as a set of entries in
     -- the atmVpCrossConnectTable. A
     -- point-to-point VPC cross-connect is modeled
     -- as one entry; a point-to-multipoint (N leafs) VPC
     -- cross-connect as N entries in this table; and
     -- a multipoint-to-multipoint (N parties) VPC cross-
     -- connect as N(N-1)/2 entries in this table.
     -- In the latter cases, all the N (or N(N-1)/2) entries
     -- are associated with a single VPC cross-connect by
     -- having the same value of atmVpCrossConnectIndex.


     --      _________________________________________
     --      |                                       |
     --  Low |         ATM Switch or Network         | High
     --  port|                                       | port
     -- _____|>> from low to high VPC traffic flow >>|______
     --      |<< from high to low VPC traffic flow <<|
     --      |                                       |
     --      |_______________________________________|
     --

     -- The terms low and high are chosen to represent
     -- numerical ordering of the two interfaces associated
     -- with a VPC cross-connect. That is, the ATM interface
     -- with the lower value of ifIndex is termed 'low',
     -- while the other ATM interface associated with the
     -- VPC cross-connect is termed 'high'. This terminology



Tesink                      Standards Track                    [Page 48]
^L
RFC 2515                 ATM Management Objects            February 1999


     -- is used to provide directional information; for
     -- example, the atmVpCrossConnectL2HOperStatus applies
     -- to the low->high direction, and
     -- atmVpCrossConnectH2LOperStatus applies to the
     -- high->low  direction, as illustrated above.




     atmVpCrossConnectIndexNext  OBJECT-TYPE
          SYNTAX         INTEGER (0..2147483647)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "This object contains an appropriate value to
            be used for atmVpCrossConnectIndex when creating
            entries in the atmVpCrossConnectTable.  The value
            0 indicates that no unassigned entries are
            available. To obtain the atmVpCrossConnectIndex
            value for a new entry, the manager issues a
            management protocol retrieval operation to obtain
            the current value of this object.  After each
            retrieval, the agent should modify the value to
            the next unassigned index.
            After a manager retrieves a value the agent will
            determine through its local policy when this index
            value will be made available for reuse."
          ::= { atmMIBObjects 8 }


     --  The ATM VP Cross Connect Table


     atmVpCrossConnectTable OBJECT-TYPE
          SYNTAX         SEQUENCE OF AtmVpCrossConnectEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The ATM VP Cross Connect table for PVCs.
            An entry in this table models two
            cross-connected VPLs.
            Each VPL must have its atmConnKind set
            to pvc(1)."
          ::= { atmMIBObjects 9 }


     atmVpCrossConnectEntry OBJECT-TYPE
          SYNTAX         AtmVpCrossConnectEntry



Tesink                      Standards Track                    [Page 49]
^L
RFC 2515                 ATM Management Objects            February 1999


          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "An entry in the ATM VP Cross Connect table.
            This entry is used to model a bi-directional
            ATM VP cross-connect which cross-connects
            two VPLs.

            Step-wise Procedures to set up a VP Cross-connect

            Once the entries in the atmVplTable are created,
            the following procedures are used
            to cross-connect the VPLs together.

           (1) The manager obtains a unique
               atmVpCrossConnectIndex by reading the
               atmVpCrossConnectIndexNext object.

           (2) Next, the manager creates a set of one
               or more rows in the ATM VP Cross Connect
               Table, one for each cross-connection between
               two VPLs.  Each row is indexed by the ATM
               interface port numbers and VPI values of the
               two ends of that cross-connection.
               This set of rows specifies the topology of the
               VPC cross-connect and is identified by a single
               value of atmVpCrossConnectIndex.

            Negotiated VP Cross-Connect Establishment

          (2a) The manager creates a row in this table by
               setting atmVpCrossConnectRowStatus to
               createAndWait(5).  The agent checks the
               requested topology and the mutual sanity of
               the ATM traffic parameters and
               service categories, i.e., the row creation
               fails if:
               - the requested topology is incompatible with
                 associated values of atmVplCastType,
               - the requested topology is not supported
                 by the agent,
               - the traffic/service category parameter values
                 associated with the requested row are
                 incompatible with those of already existing
                 rows for this VP cross-connect.
               [For example, for setting up
               a point-to-point VP cross-connect, the
               ATM traffic parameters in the receive direction



Tesink                      Standards Track                    [Page 50]
^L
RFC 2515                 ATM Management Objects            February 1999


               of a VPL at the low end of the cross-connect
               must equal to the traffic parameters in the
               transmit direction of the other VPL at the
               high end of the cross-connect,
               otherwise, the row creation fails.]
               The agent also checks for internal errors
               in building the cross-connect.

               The atmVpCrossConnectIndex values in the
               corresponding atmVplTable rows are filled
               in by the agent at this point.

          (2b) The manager promotes the row in the
               atmVpCrossConnectTable by setting
               atmVpCrossConnectRowStatus to active(1).  If
               this set is successful, the agent has reserved
               the resources specified by the ATM traffic
               parameter and Service category values
               for each direction of the VP cross-connect
               in an ATM switch or network.

           (3) The manager sets the
               atmVpCrossConnectAdminStatus to up(1) in all
               rows of this VP cross-connect to turn the
               traffic flow on.


            One-Shot VP Cross-Connect Establishment

            A VP cross-connect may also be established in
            one step by a set-request with all necessary
            parameter values and atmVpCrossConnectRowStatus
            set to createAndGo(4).

            In contrast to the negotiated VP cross-connect
            establishment which allows for detailed error
            checking (i.e., set errors are explicitly linked
            to particular resource acquisition failures),
            the one-shot VP cross-connect establishment
            performs the setup on one operation but does not
            have the advantage of step-wise error checking.

            VP Cross-Connect Retirement

            A VP cross-connect identified by a particular
            value of atmVpCrossConnectIndex is released by:

           (1) Setting atmVpCrossConnectRowStatus of all



Tesink                      Standards Track                    [Page 51]
^L
RFC 2515                 ATM Management Objects            February 1999


               rows identified by this value of
               atmVpCrossConnectIndex to destroy(6).
               The agent may release all
               associated resources, and the
               atmVpCrossConnectIndex values in the
               corresponding atmVplTable row are removed.
               Note that a situation when only a subset of
               the associated rows are deleted corresponds
               to a VP topology change.

           (2) After deletion of the appropriate
               atmVpCrossConnectEntries, the manager may
               set atmVplRowStatus to destroy(6) the
               associated VPLs.  The agent releases
               the resources and removes the associated
               rows in the atmVplTable.

            VP Cross-connect Reconfiguration

            At the discretion of the agent, a VP
            cross-connect may be reconfigured by
            adding and/or deleting leafs to/from
            the VP topology as per the VP cross-connect
            establishment/retirement procedures.
            Reconfiguration of traffic/service category parameter
            values requires release of the VP cross-connect
            before those parameter values may by changed
            for individual VPLs."
          INDEX { atmVpCrossConnectIndex,
                atmVpCrossConnectLowIfIndex,
                atmVpCrossConnectLowVpi,
                atmVpCrossConnectHighIfIndex,
                atmVpCrossConnectHighVpi }
          ::= { atmVpCrossConnectTable 1 }

     AtmVpCrossConnectEntry ::= SEQUENCE {
          atmVpCrossConnectIndex          INTEGER,
          atmVpCrossConnectLowIfIndex     InterfaceIndex,
          atmVpCrossConnectLowVpi         AtmVpIdentifier,
          atmVpCrossConnectHighIfIndex    InterfaceIndex,
          atmVpCrossConnectHighVpi        AtmVpIdentifier,
          atmVpCrossConnectAdminStatus    AtmVorXAdminStatus,
          atmVpCrossConnectL2HOperStatus  AtmVorXOperStatus,
          atmVpCrossConnectH2LOperStatus  AtmVorXOperStatus,
          atmVpCrossConnectL2HLastChange  AtmVorXLastChange,
          atmVpCrossConnectH2LLastChange  AtmVorXLastChange,
          atmVpCrossConnectRowStatus      RowStatus
                  }



Tesink                      Standards Track                    [Page 52]
^L
RFC 2515                 ATM Management Objects            February 1999


     atmVpCrossConnectIndex OBJECT-TYPE
          SYNTAX         INTEGER (1..2147483647)
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "A unique value to identify this VP cross-connect.
            For each VPL associated with this cross-connect,
            the agent reports this cross-connect index value
            in the atmVplCrossConnectIdentifier attribute of
            the corresponding atmVplTable entries."
          ::= { atmVpCrossConnectEntry 1 }

     atmVpCrossConnectLowIfIndex OBJECT-TYPE
          SYNTAX         InterfaceIndex
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The ifIndex value of the ATM interface for
            this VP cross-connect. The term low implies
            that this ATM interface has the numerically lower
            ifIndex value than the other ATM interface
            identified in the same atmVpCrossConnectEntry."
          ::= { atmVpCrossConnectEntry 2 }

     atmVpCrossConnectLowVpi OBJECT-TYPE
          SYNTAX         AtmVpIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VPI value at the ATM interface
            associated with the VP cross-connect that is
            identified by atmVpCrossConnectLowIfIndex."
          ::= { atmVpCrossConnectEntry 3 }

     atmVpCrossConnectHighIfIndex OBJECT-TYPE
          SYNTAX         InterfaceIndex
          MAX-ACCESS     not-accessible
          STATUS  current
          DESCRIPTION
           "The ifIndex value of the ATM interface for
            this VP cross-connect. The term high implies that
            this ATM interface has the numerically higher
            ifIndex value than the  other ATM interface
            identified in the same atmVpCrossConnectEntry."
          ::= { atmVpCrossConnectEntry 4 }

     atmVpCrossConnectHighVpi OBJECT-TYPE
          SYNTAX         AtmVpIdentifier



Tesink                      Standards Track                    [Page 53]
^L
RFC 2515                 ATM Management Objects            February 1999


          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VPI value at the ATM interface
            associated with the VP cross-connect that is
            identified by atmVpCrossConnectHighIfIndex."
          ::= { atmVpCrossConnectEntry 5 }

     atmVpCrossConnectAdminStatus OBJECT-TYPE
          SYNTAX         AtmVorXAdminStatus
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The desired administrative status of this
            bi-directional VP cross-connect."
          DEFVAL { down }
          ::= { atmVpCrossConnectEntry 6 }

     atmVpCrossConnectL2HOperStatus OBJECT-TYPE
          SYNTAX         AtmVorXOperStatus
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The operational status of the VP cross-connect
            in one direction; (i.e., from the low to
            high direction)."
          ::= { atmVpCrossConnectEntry 7 }

     atmVpCrossConnectH2LOperStatus OBJECT-TYPE
          SYNTAX         AtmVorXOperStatus
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The operational status of the VP cross-connect
            in one direction; (i.e., from the high to
            low direction)."
          ::= { atmVpCrossConnectEntry 8 }

     atmVpCrossConnectL2HLastChange OBJECT-TYPE
          SYNTAX         AtmVorXLastChange
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The value of sysUpTime at the time this
            VP cross-connect entered its current operational
            state in the low to high direction."
          ::= { atmVpCrossConnectEntry 9 }




Tesink                      Standards Track                    [Page 54]
^L
RFC 2515                 ATM Management Objects            February 1999


     atmVpCrossConnectH2LLastChange OBJECT-TYPE
          SYNTAX         AtmVorXLastChange
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
            "The value of sysUpTime at the time this
            VP cross-connect entered its current operational
            in the high to low direction."
          ::= { atmVpCrossConnectEntry 10 }

     atmVpCrossConnectRowStatus OBJECT-TYPE
          SYNTAX         RowStatus
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The status of this entry in the
            atmVpCrossConnectTable.  This object is used to
            create a cross-connect for cross-connecting
            VPLs which are created using the atmVplTable
            or to change or delete an existing cross-connect.
            This object must be initially set
            to `createAndWait' or 'createAndGo'.
            To turn on a VP cross-connect,
            the atmVpCrossConnectAdminStatus
            is set to `up'."
          DEFVAL { createAndWait }
          ::= { atmVpCrossConnectEntry 11 }


     --     ATM Virtual Channel (VC) Cross Connect Table

     -- This table contains configuration and state
     -- information of point-to-point,
     -- point-to-multipoint or multipoint-to-multipoint
     -- VC cross-connects for PVCs.

     -- This table has read-create access and is used
     -- to cross-connect the VCLs together in an ATM switch
     -- or network that belong to a VC connection.
     -- The atmVcCrossConnectIndex is used to associate
     -- the related VCLs that are cross-connected together.



     -- The model using step-wise procedures described for setting
     -- up a VP cross-connect is also used for setting up
     -- a VC cross-connect.




Tesink                      Standards Track                    [Page 55]
^L
RFC 2515                 ATM Management Objects            February 1999


     atmVcCrossConnectIndexNext  OBJECT-TYPE
          SYNTAX         INTEGER (0..2147483647)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "This object contains an appropriate value to
            be used for atmVcCrossConnectIndex when creating
            entries in the atmVcCrossConnectTable.  The value
            0 indicates that no unassigned entries are
            available. To obtain the atmVcCrossConnectIndex
            value for a new entry, the manager issues a
            management protocol retrieval operation to obtain
            the current value of this object.  After each
            retrieval, the agent should modify the value to
            the next unassigned index.
            After a manager retrieves a value the agent will
            determine through its local policy when this index
            value will be made available for reuse."
          ::= { atmMIBObjects 10 }


     --  The ATM VC Cross Connect Table


     atmVcCrossConnectTable OBJECT-TYPE
          SYNTAX         SEQUENCE OF AtmVcCrossConnectEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The ATM VC Cross Connect table for PVCs.
            An entry in this table models two
            cross-connected VCLs.
            Each VCL must have its atmConnKind set
            to pvc(1)."
          ::= { atmMIBObjects 11 }


     atmVcCrossConnectEntry OBJECT-TYPE
          SYNTAX       AtmVcCrossConnectEntry
          MAX-ACCESS   not-accessible
          STATUS       current
          DESCRIPTION
           "An entry in the ATM VC Cross Connect table.
            This entry is used to model a bi-directional ATM
            VC cross-connect cross-connecting two end points.

            Step-wise Procedures to set up a VC Cross-connect




Tesink                      Standards Track                    [Page 56]
^L
RFC 2515                 ATM Management Objects            February 1999


            Once the entries in the atmVclTable are created,
            the following procedures are used
            to cross-connect the VCLs together to
            form a VCC segment.

           (1) The manager obtains a unique
               atmVcCrossConnectIndex by reading the
               atmVcCrossConnectIndexNext object.

           (2) Next, the manager creates a set of one
               or more rows in the ATM VC Cross Connect
               Table, one for each cross-connection between
               two VCLs.  Each row is indexed by the ATM
               interface port numbers and VPI/VCI values of
               the two ends of that cross-connection.
               This set of rows specifies the topology of the
               VCC cross-connect and is identified by a single
               value of atmVcCrossConnectIndex.

            Negotiated VC Cross-Connect Establishment

          (2a) The manager creates a row in this table by
               setting atmVcCrossConnectRowStatus to
               createAndWait(5).  The agent checks the
               requested topology and the mutual sanity of
               the ATM traffic parameters and
               service categories, i.e., the row creation
               fails if:
               - the requested topology is incompatible with
                 associated values of atmVclCastType,
               - the requested topology is not supported
                 by the agent,
               - the traffic/service category parameter values
                 associated with the requested row are
                 incompatible with those of already existing
                 rows for this VC cross-connect.
               [For example, for setting up
               a point-to-point VC cross-connect, the
               ATM traffic parameters in the receive direction
               of a VCL at the low end of the cross-connect
               must equal to the traffic parameters in the
               transmit direction of the other VCL at the
               high end of the cross-connect,
               otherwise, the row creation fails.]
               The agent also checks for internal errors
               in building the cross-connect.

               The atmVcCrossConnectIndex values in the



Tesink                      Standards Track                    [Page 57]
^L
RFC 2515                 ATM Management Objects            February 1999


               corresponding atmVclTable rows are filled
               in by the agent at this point.

          (2b) The manager promotes the row in the
               atmVcCrossConnectTable by setting
               atmVcCrossConnectRowStatus to active(1).  If
               this set is successful, the agent has reserved
               the resources specified by the ATM traffic
               parameter and Service category values
               for each direction of the VC cross-connect
               in an ATM switch or network.

           (3) The manager sets the
               atmVcCrossConnectAdminStatus to up(1)
               in all rows of this VC cross-connect to
               turn the traffic flow on.


            One-Shot VC Cross-Connect Establishment

            A VC cross-connect may also be established in
            one step by a set-request with all necessary
            parameter values and atmVcCrossConnectRowStatus
            set to createAndGo(4).

            In contrast to the negotiated VC cross-connect
            establishment which allows for detailed error
            checking i.e., set errors are explicitly linked to
            particular resource acquisition failures), the
            one-shot VC cross-connect establishment
            performs the setup on one operation but does
            not have the advantage of step-wise error
            checking.

            VC Cross-Connect Retirement

            A VC cross-connect identified by a particular
            value of atmVcCrossConnectIndex is released by:

           (1) Setting atmVcCrossConnectRowStatus of all rows
               identified by this value of
               atmVcCrossConnectIndex to destroy(6).
               The agent may release all
               associated resources, and the
               atmVcCrossConnectIndex values in the
               corresponding atmVclTable row are removed.
               Note that a situation when only a subset of
               the associated rows are deleted corresponds



Tesink                      Standards Track                    [Page 58]
^L
RFC 2515                 ATM Management Objects            February 1999


               to a VC topology change.

           (2) After deletion of the appropriate
               atmVcCrossConnectEntries, the manager may
               set atmVclRowStatus to destroy(6) the
               associated VCLs.  The agent releases
               the resources and removes the associated
               rows in the atmVclTable.

            VC Cross-Connect Reconfiguration

            At the discretion of the agent, a VC
            cross-connect may be reconfigured by
            adding and/or deleting leafs to/from
            the VC topology as per the VC cross-connect
            establishment/retirement procedures.
            Reconfiguration of traffic/service category parameter
            values requires release of the VC cross-connect
            before those parameter values may by changed
            for individual VCLs."
          INDEX { atmVcCrossConnectIndex,
                atmVcCrossConnectLowIfIndex,
                atmVcCrossConnectLowVpi,
                atmVcCrossConnectLowVci,
                atmVcCrossConnectHighIfIndex,
                atmVcCrossConnectHighVpi,
                atmVcCrossConnectHighVci }
          ::= { atmVcCrossConnectTable 1 }

     AtmVcCrossConnectEntry ::= SEQUENCE {
          atmVcCrossConnectIndex          INTEGER,
          atmVcCrossConnectLowIfIndex     InterfaceIndex,
          atmVcCrossConnectLowVpi         AtmVpIdentifier,
          atmVcCrossConnectLowVci         AtmVcIdentifier,
          atmVcCrossConnectHighIfIndex    InterfaceIndex,
          atmVcCrossConnectHighVpi        AtmVpIdentifier,
          atmVcCrossConnectHighVci        AtmVcIdentifier,
          atmVcCrossConnectAdminStatus    AtmVorXAdminStatus,
          atmVcCrossConnectL2HOperStatus  AtmVorXOperStatus,
          atmVcCrossConnectH2LOperStatus  AtmVorXOperStatus,
          atmVcCrossConnectL2HLastChange  AtmVorXLastChange,
          atmVcCrossConnectH2LLastChange  AtmVorXLastChange,
          atmVcCrossConnectRowStatus      RowStatus
                  }

     atmVcCrossConnectIndex OBJECT-TYPE
          SYNTAX         INTEGER (1..2147483647)
          MAX-ACCESS     not-accessible



Tesink                      Standards Track                    [Page 59]
^L
RFC 2515                 ATM Management Objects            February 1999


          STATUS         current
          DESCRIPTION
           "A unique value to identify this VC cross-connect.
            For each VCL associated with this cross-connect,
            the agent reports this cross-connect index value
            in the atmVclCrossConnectIdentifier attribute of
            the corresponding atmVclTable entries."
          ::= { atmVcCrossConnectEntry 1 }

     atmVcCrossConnectLowIfIndex OBJECT-TYPE
          SYNTAX         InterfaceIndex
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The ifIndex value of the ATM interface for this
            VC cross-connect. The term low implies
            that this ATM interface has the numerically lower
            ifIndex value than the other ATM interface
            identified in the same atmVcCrossConnectEntry."
          ::= { atmVcCrossConnectEntry 2 }

     atmVcCrossConnectLowVpi OBJECT-TYPE
          SYNTAX         AtmVpIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VPI value at the ATM interface
            associated with the VC cross-connect that is
            identified by atmVcCrossConnectLowIfIndex."
          ::= { atmVcCrossConnectEntry 3 }

     atmVcCrossConnectLowVci OBJECT-TYPE
          SYNTAX         AtmVcIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VCI value at the ATM interface
            associated with this VC cross-connect that is
            identified by atmVcCrossConnectLowIfIndex."
          ::= { atmVcCrossConnectEntry 4 }

     atmVcCrossConnectHighIfIndex OBJECT-TYPE
          SYNTAX         InterfaceIndex
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The ifIndex value for the ATM interface for
            this VC cross-connect. The term high implies



Tesink                      Standards Track                    [Page 60]
^L
RFC 2515                 ATM Management Objects            February 1999


            that this ATM interface has the numerically higher
            ifIndex value than the other ATM interface
            identified in the same atmVcCrossConnectEntry."
          ::= { atmVcCrossConnectEntry 5 }

     atmVcCrossConnectHighVpi OBJECT-TYPE
          SYNTAX         AtmVpIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VPI value at the ATM interface
            associated with the VC cross-connect that is
            identified by atmVcCrossConnectHighIfIndex."
          ::= { atmVcCrossConnectEntry 6 }

     atmVcCrossConnectHighVci OBJECT-TYPE
          SYNTAX         AtmVcIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VCI value at the ATM interface
            associated with the VC cross-connect that is
            identified by atmVcCrossConnectHighIfIndex."
          ::= { atmVcCrossConnectEntry 7 }

     atmVcCrossConnectAdminStatus OBJECT-TYPE
          SYNTAX         AtmVorXAdminStatus
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The desired administrative status of this
            bi-directional VC cross-connect."
          DEFVAL { down }
          ::= { atmVcCrossConnectEntry 8 }

     atmVcCrossConnectL2HOperStatus OBJECT-TYPE
          SYNTAX         AtmVorXOperStatus
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The current operational status of the
            VC cross-connect in one direction; (i.e.,
            from the low to high direction)."
          ::= { atmVcCrossConnectEntry 9 }


     atmVcCrossConnectH2LOperStatus OBJECT-TYPE
          SYNTAX         AtmVorXOperStatus



Tesink                      Standards Track                    [Page 61]
^L
RFC 2515                 ATM Management Objects            February 1999


          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The current operational status of the
            VC cross-connect in one direction; (i.e.,
            from the high to low direction)."
          ::= { atmVcCrossConnectEntry 10 }

     atmVcCrossConnectL2HLastChange OBJECT-TYPE
          SYNTAX         AtmVorXLastChange
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The value of sysUpTime at the time this
            VC cross-connect entered its current
            operational state in low to high direction."
          ::= { atmVcCrossConnectEntry 11 }

     atmVcCrossConnectH2LLastChange OBJECT-TYPE
          SYNTAX         AtmVorXLastChange
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The value of sysUpTime at the time this
            VC cross-connect entered its current
            operational state in high to low direction."
          ::= { atmVcCrossConnectEntry 12 }

     atmVcCrossConnectRowStatus OBJECT-TYPE
          SYNTAX         RowStatus
          MAX-ACCESS     read-create
          STATUS         current
          DESCRIPTION
           "The status of this entry in the
            atmVcCrossConnectTable.  This object is used to
            create a new cross-connect for cross-connecting
            VCLs which are created using the atmVclTable
            or to change or delete existing cross-connect.
            This object must be initially set to
            `createAndWait' or 'createAndGo'.
            To turn on a VC cross-connect,
            the atmVcCrossConnectAdminStatus
            is set to `up'."
          DEFVAL { createAndWait }
          ::= { atmVcCrossConnectEntry 13 }


     -- AAL5 Virtual Channel Connection Performance Statistics



Tesink                      Standards Track                    [Page 62]
^L
RFC 2515                 ATM Management Objects            February 1999


     -- Table

     -- This table contains the AAL5
     -- performance statistics of a VCC at the
     -- interface associated with an AAL5 entity in an ATM
     -- host or ATM switch.


     aal5VccTable        OBJECT-TYPE
          SYNTAX         SEQUENCE OF Aal5VccEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This table contains AAL5 VCC performance
            parameters."
          ::= { atmMIBObjects 12 }

     aal5VccEntry        OBJECT-TYPE
          SYNTAX         Aal5VccEntry
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "This list contains the AAL5 VCC
            performance parameters and is indexed
            by ifIndex values of AAL5 interfaces
            and the associated VPI/VCI values."
          INDEX { ifIndex, aal5VccVpi, aal5VccVci }
          ::= { aal5VccTable 1 }

     Aal5VccEntry    ::= SEQUENCE  {
          aal5VccVpi             AtmVpIdentifier,
          aal5VccVci             AtmVcIdentifier,
          aal5VccCrcErrors       Counter32,
          aal5VccSarTimeOuts     Counter32,
          aal5VccOverSizedSDUs   Counter32
               }


     aal5VccVpi          OBJECT-TYPE
          SYNTAX         AtmVpIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VPI value of the AAL5 VCC at the
            interface identified by the ifIndex."
          ::= { aal5VccEntry 1 }

     aal5VccVci          OBJECT-TYPE



Tesink                      Standards Track                    [Page 63]
^L
RFC 2515                 ATM Management Objects            February 1999


          SYNTAX         AtmVcIdentifier
          MAX-ACCESS     not-accessible
          STATUS         current
          DESCRIPTION
           "The VCI value of the AAL5 VCC at the
            interface identified by the ifIndex."
          ::= { aal5VccEntry 2 }

     aal5VccCrcErrors    OBJECT-TYPE
          SYNTAX         Counter32
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The number of AAL5 CPCS PDUs received with
            CRC-32 errors on this AAL5 VCC at the
            interface associated with an AAL5 entity."
          ::= { aal5VccEntry 3 }

     aal5VccSarTimeOuts  OBJECT-TYPE
          SYNTAX         Counter32
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The number of partially re-assembled AAL5
            CPCS PDUs which were discarded
            on this AAL5 VCC at the interface associated
            with an AAL5 entity because they
            were not fully re-assembled within the
            required time period.  If the re-assembly
            timer is not supported, then this object
            contains a zero value."
          ::= { aal5VccEntry 4 }

     aal5VccOverSizedSDUs OBJECT-TYPE
          SYNTAX         Counter32
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "The number of AAL5 CPCS PDUs discarded
            on this AAL5 VCC at the interface
            associated with an AAL5 entity because the
            AAL5 SDUs were too large."
          ::= { aal5VccEntry 5 }


     --
     -- The following object may be used in conjunction with
     -- the atmTrafficDescrParamTable for the creation of



Tesink                      Standards Track                    [Page 64]
^L
RFC 2515                 ATM Management Objects            February 1999


     -- new table entries.
     --

     atmTrafficDescrParamIndexNext  OBJECT-TYPE
          SYNTAX         INTEGER (0..2147483647)
          MAX-ACCESS     read-only
          STATUS         current
          DESCRIPTION
           "This object contains an appropriate value to
            be used for atmTrafficDescrParamIndex when
            creating entries in the
            atmTrafficDescrParamTable.
            The value 0 indicates that no unassigned
            entries are available. To obtain the
            atmTrafficDescrParamIndex value for a new
            entry, the manager issues a management
            protocol retrieval operation to obtain the
            current value of this object.  After each
            retrieval, the agent should modify the value
            to the next unassigned index.
            After a manager retrieves a value the agent will
            determine through its local policy when this index
            value will be made available for reuse."
          ::= { atmMIBObjects 13 }


     -- Conformance Information

     atmMIBConformance   OBJECT IDENTIFIER ::= { atmMIB 2 }

     atmMIBGroups        OBJECT IDENTIFIER
                                ::= { atmMIBConformance 1 }
     atmMIBCompliances   OBJECT IDENTIFIER
                                ::= { atmMIBConformance 2 }


     -- Compliance Statements

     atmMIBCompliance2    MODULE-COMPLIANCE
          STATUS         current
          DESCRIPTION
            "The compliance statement for SNMP entities
             including networks which have ATM and
             AAL5 interfaces."

          MODULE -- this module
     --
     -- ****** Interface and Traffic Descriptor Support ***



Tesink                      Standards Track                    [Page 65]
^L
RFC 2515                 ATM Management Objects            February 1999


     --
            MANDATORY-GROUPS  {atmInterfaceConfGroup2,
                               atmTrafficDescrGroup2 }

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

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

            OBJECT         atmInterfaceMaxActiveVpiBits
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required.
               At the ATM UNI the maximum number of
               active VPI bits configured for use ranges
               from 0 to 8 only.
               Implementations may support smaller ranges."
            OBJECT         atmInterfaceMaxActiveVciBits
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required.
               Implementations may support smaller ranges."

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

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

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

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




Tesink                      Standards Track                    [Page 66]
^L
RFC 2515                 ATM Management Objects            February 1999


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

            OBJECT         atmTrafficDescrParamIndexNext
            DESCRIPTION
              "This object is only required for systems
               that support the creation of entries in
               the atmTrafficDescrParamTable."

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

            OBJECT         atmTrafficDescrParam1
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam2
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam3
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam4
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam5
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

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

            OBJECT         atmTrafficDescrRowStatus
            SYNTAX         INTEGER {active(1)}



Tesink                      Standards Track                    [Page 67]
^L
RFC 2515                 ATM Management Objects            February 1999


                             -- subset of RowStatus
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

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

     --
     -- ****** DS3 PLCP Support **************************
     --
            GROUP          atmInterfaceDs3PlcpGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement the
               DS3 PLCP layer."
     --
     -- ****** TC Sublayer Support ********************************
     --
            GROUP          atmInterfaceTCGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement the
               TC Sublayer."

     --
     -- ****** VPC Support *******************************
     --
            GROUP          atmVpcTerminationGroup2
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VPLs that terminate VPCs (i.e., ones which
               are NOT cross-connected to other VPLs)."

            GROUP          atmVplCrossConnectGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VPLs that are not associated with VCLs
               and are cross-connected to other VPLs
               for VPCs."




Tesink                      Standards Track                    [Page 68]
^L
RFC 2515                 ATM Management Objects            February 1999


            GROUP          atmVpPvcCrossConnectGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VPLs that are not associated with VCLs
               and are cross-connected to other VPLs
               for permanent VPCs (i.e., PVCs).
               This group is not used to crossconnect
               a PVC with an SVC to form a Soft PVC."

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

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

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

            OBJECT         atmVplRowStatus
            SYNTAX         INTEGER {active(1)}
                             -- subset of RowStatus
            MIN-ACCESS      read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

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

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

            OBJECT         atmVpCrossConnectAdminStatus
            MIN-ACCESS     read-only
            DESCRIPTION



Tesink                      Standards Track                    [Page 69]
^L
RFC 2515                 ATM Management Objects            February 1999


              "Write access is not required."

            OBJECT         atmVpCrossConnectRowStatus
            SYNTAX         INTEGER {active(1)}
                             -- subset of RowStatus
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

     --
     -- ****** VCC Support *******************************
     --
            GROUP          atmVccTerminationGroup2
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VCLs that terminate VCCs (i.e., ones which
               are NOT cross-connected to other VCLs)."

            GROUP          atmVclCrossConnectGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VCLs that are cross-connected to other VCLs
               for VCCs."

            GROUP          atmVcPvcCrossConnectGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VCLs that are cross-connected to other
               VCLs for permanent VCCs (i.e., PVCs).
               This group is not used to crossconnect
               a PVC with an SVC to form a Soft PVC."

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

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




Tesink                      Standards Track                    [Page 70]
^L
RFC 2515                 ATM Management Objects            February 1999


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

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

            OBJECT         atmVclRowStatus
            SYNTAX         INTEGER {active(1)}
                             -- subset of RowStatus
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

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

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

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

            OBJECT         atmVcCrossConnectRowStatus
            SYNTAX         INTEGER { active(1)}
                             -- subset of RowStatus
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."
     --
     -- ****** AAL5 Support ******************************
     --
            GROUP          aal5VccGroup



Tesink                      Standards Track                    [Page 71]
^L
RFC 2515                 ATM Management Objects            February 1999


            DESCRIPTION
              "This group is mandatory for the
               AAL5 virtual connections only."
            OBJECT         atmVccAal5CpcsTransmitSduSize
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmVccAal5CpcsReceiveSduSize
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmVccAal5EncapsType
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."
             ::= { atmMIBCompliances 2 }


     -- Units of Conformance

     atmInterfaceDs3PlcpGroup    OBJECT-GROUP
            OBJECTS {atmInterfaceDs3PlcpSEFSs,
                atmInterfaceDs3PlcpAlarmState,
                atmInterfaceDs3PlcpUASs}
            STATUS     current
            DESCRIPTION
               "A collection of objects providing information
                about DS3 PLCP layer at an ATM interface."
            ::= { atmMIBGroups 3 }

     atmInterfaceTCGroup    OBJECT-GROUP
            OBJECTS { atmInterfaceOCDEvents,
                atmInterfaceTCAlarmState }
            STATUS     current
            DESCRIPTION
               "A collection of objects providing information
                about TC sublayer at an ATM interface."
            ::= { atmMIBGroups 4 }

     aal5VccGroup    OBJECT-GROUP
            OBJECTS {atmVccAal5CpcsTransmitSduSize,
                atmVccAal5CpcsReceiveSduSize,
                atmVccAal5EncapsType,
                aal5VccCrcErrors, aal5VccSarTimeOuts,
                aal5VccOverSizedSDUs }
            STATUS     current



Tesink                      Standards Track                    [Page 72]
^L
RFC 2515                 ATM Management Objects            February 1999


            DESCRIPTION
               "A collection of objects providing
                AAL5 configuration and performance statistics
                of a VCC."
            ::= { atmMIBGroups 9 }

     atmInterfaceConfGroup2    OBJECT-GROUP
            OBJECTS {
                  atmInterfaceMaxVpcs, atmInterfaceMaxVccs,
                  atmInterfaceConfVpcs, atmInterfaceConfVccs,
                  atmInterfaceMaxActiveVpiBits,
                  atmInterfaceMaxActiveVciBits,
                  atmInterfaceIlmiVpi,
                  atmInterfaceIlmiVci,
                  atmInterfaceMyNeighborIpAddress,
                  atmInterfaceMyNeighborIfName,
                  atmInterfaceCurrentMaxVpiBits,
                  atmInterfaceCurrentMaxVciBits,
                  atmInterfaceSubscrAddress }
            STATUS     current
            DESCRIPTION
              "A collection of objects providing configuration
               information about an ATM interface."
            ::= { atmMIBGroups 10 }

     atmTrafficDescrGroup2    OBJECT-GROUP
            OBJECTS {
                atmTrafficDescrType, atmTrafficDescrParam1,
                atmTrafficDescrParam2, atmTrafficDescrParam3,
                atmTrafficDescrParam4, atmTrafficDescrParam5,
                atmTrafficDescrRowStatus, atmServiceCategory,
                atmTrafficFrameDiscard,
                atmTrafficDescrParamIndexNext }
            STATUS     current
            DESCRIPTION
               "A collection of objects providing information
                about ATM traffic descriptor type and
                the associated parameters."
            ::= { atmMIBGroups 11 }

     atmVpcTerminationGroup2    OBJECT-GROUP
            OBJECTS  {atmVplOperStatus, atmVplAdminStatus,
                atmVplLastChange,
                atmVplReceiveTrafficDescrIndex,
                atmVplTransmitTrafficDescrIndex,
                atmVplRowStatus, atmVplCastType,
                atmVplConnKind }
            STATUS     current



Tesink                      Standards Track                    [Page 73]
^L
RFC 2515                 ATM Management Objects            February 1999


            DESCRIPTION
               "A collection of objects providing information
                about a VPL at an ATM interface which
                terminates a VPC (i.e., one which is NOT
                cross-connected to other VPLs)."
            ::= { atmMIBGroups 12 }

     atmVccTerminationGroup2    OBJECT-GROUP
            OBJECTS {atmVclOperStatus, atmVclAdminStatus,
                 atmVclLastChange,
                 atmVclReceiveTrafficDescrIndex,
                 atmVclTransmitTrafficDescrIndex,
                 atmVccAalType, atmVclRowStatus,
                 atmVclCastType, atmVclConnKind }
            STATUS     current
            DESCRIPTION
               "A collection of objects providing information
                about a VCL at an ATM interface
                which terminates a VCC (i.e., one which is
                NOT cross-connected to other VCLs)."
            ::= { atmMIBGroups 13 }

     atmVplCrossConnectGroup    OBJECT-GROUP
            OBJECTS { atmVplReceiveTrafficDescrIndex,
                atmVplTransmitTrafficDescrIndex,
                atmVplOperStatus, atmVplLastChange,
                atmVplRowStatus,
                atmVplCastType, atmVplConnKind }
            STATUS     current
            DESCRIPTION
               "A collection of objects providing
                information about the VPLs that
                are cross-connected together."
            ::= { atmMIBGroups 14 }

     atmVpPvcCrossConnectGroup    OBJECT-GROUP
            OBJECTS { atmVpCrossConnectAdminStatus,
                atmVpCrossConnectL2HOperStatus,
                atmVpCrossConnectH2LOperStatus,
                atmVpCrossConnectL2HLastChange,
                atmVpCrossConnectH2LLastChange,
                atmVpCrossConnectRowStatus,
                atmVplCrossConnectIdentifier,
                atmVpCrossConnectIndexNext }
            STATUS     current
            DESCRIPTION
               "A collection of objects providing
                information about a VP cross-connect



Tesink                      Standards Track                    [Page 74]
^L
RFC 2515                 ATM Management Objects            February 1999


                for PVCs. These objects are not used
                for Soft PVCs or SVCs."
            ::= { atmMIBGroups 15 }

     atmVclCrossConnectGroup    OBJECT-GROUP
            OBJECTS { atmVclReceiveTrafficDescrIndex,
                atmVclTransmitTrafficDescrIndex,
                atmVclOperStatus, atmVclLastChange,
                atmVclRowStatus,
                atmVclCastType, atmVclConnKind }
            STATUS     current
            DESCRIPTION
               "A collection of objects providing
                information about the VCLs that
                are cross-connected together."
            ::= { atmMIBGroups 16 }

     atmVcPvcCrossConnectGroup    OBJECT-GROUP
            OBJECTS { atmVcCrossConnectAdminStatus,
                atmVcCrossConnectL2HOperStatus,
                atmVcCrossConnectH2LOperStatus,
                atmVcCrossConnectL2HLastChange,
                atmVcCrossConnectH2LLastChange,
                atmVcCrossConnectRowStatus,
                atmVclCrossConnectIdentifier,
                atmVcCrossConnectIndexNext }
            STATUS     current
            DESCRIPTION
               "A collection of objects providing
                information about a VC cross-connect
                for PVCs. These objects are not used
                for Soft PVCs or SVCs."
            ::= { atmMIBGroups 17 }


     -- Deprecated Definitions - Objects

     -- atmInterfaceAddressType
     -- atmTrafficQoSClass


     -- Deprecated Definitions - Compliance

     atmMIBCompliance    MODULE-COMPLIANCE
          STATUS         deprecated
          DESCRIPTION
            "The compliance statement for SNMP entities
             including networks which have ATM and



Tesink                      Standards Track                    [Page 75]
^L
RFC 2515                 ATM Management Objects            February 1999


             AAL5 interfaces."

          MODULE -- this module
            MANDATORY-GROUPS  {atmInterfaceConfGroup,
                               atmTrafficDescrGroup}

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

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

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

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

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

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

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

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

            OBJECT         atmTrafficDescrType
            MIN-ACCESS     read-only



Tesink                      Standards Track                    [Page 76]
^L
RFC 2515                 ATM Management Objects            February 1999


            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam1
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam2
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam3
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam4
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmTrafficDescrParam5
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

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

            OBJECT         atmTrafficDescrRowStatus
            SYNTAX         INTEGER {active(1)}
                             -- subset of RowStatus
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

            GROUP          atmInterfaceDs3PlcpGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement the
               DS3 PLCP layer."



Tesink                      Standards Track                    [Page 77]
^L
RFC 2515                 ATM Management Objects            February 1999


            GROUP          atmInterfaceTCGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement the
               TC Sublayer."

            GROUP          atmVpcTerminationGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VPLs that terminate VPCs (i.e., ones which
               are NOT cross-connected to other VPLs)."

            GROUP          atmVpCrossConnectGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VPLs that are not associated with VCLs
               and are cross-connected to other VPLs."

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

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

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

            OBJECT         atmVplRowStatus
            SYNTAX         INTEGER {active(1)}
                             -- subset of RowStatus
            MIN-ACCESS      read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

            OBJECT         atmVpCrossConnectAdminStatus
            MIN-ACCESS     read-only
            DESCRIPTION



Tesink                      Standards Track                    [Page 78]
^L
RFC 2515                 ATM Management Objects            February 1999


              "Write access is not required."

            OBJECT         atmVpCrossConnectRowStatus
            SYNTAX         INTEGER {active(1)}
                             -- subset of RowStatus
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

            GROUP          atmVccTerminationGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VCLs that terminate VCCs (i.e., ones which
               are NOT cross-connected to other VCLs)."

            GROUP          atmVcCrossConnectGroup
            DESCRIPTION
              "This group is mandatory only for those
               ATM interfaces which implement ATM
               VCLs that are cross-connected to
               other VCLs."

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

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

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

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

            OBJECT         atmVclRowStatus
            SYNTAX         INTEGER {active(1)}



Tesink                      Standards Track                    [Page 79]
^L
RFC 2515                 ATM Management Objects            February 1999


                             -- subset of RowStatus
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

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

            OBJECT         atmVcCrossConnectRowStatus
            SYNTAX         INTEGER { active(1)}
                             -- subset of RowStatus
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required, and only one
               of the six enumerated values for the
               RowStatus textual convention need be
               supported, specifically: active(1)."

            GROUP          aal5VccGroup
            DESCRIPTION
              "This group is mandatory for the
               AAL5 virtual connections only."

            OBJECT         atmVccAal5CpcsTransmitSduSize
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmVccAal5CpcsReceiveSduSize
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."

            OBJECT         atmVccAal5EncapsType
            MIN-ACCESS     read-only
            DESCRIPTION
              "Write access is not required."
             ::= { atmMIBCompliances 1 }


     -- Deprecated Definitions - Groups





Tesink                      Standards Track                    [Page 80]
^L
RFC 2515                 ATM Management Objects            February 1999


     atmInterfaceConfGroup    OBJECT-GROUP
            OBJECTS {
                  atmInterfaceMaxVpcs, atmInterfaceMaxVccs,
                  atmInterfaceConfVpcs, atmInterfaceConfVccs,
                  atmInterfaceMaxActiveVpiBits,
                  atmInterfaceMaxActiveVciBits,
                  atmInterfaceIlmiVpi,
                  atmInterfaceIlmiVci,
                  atmInterfaceAddressType,
                  atmInterfaceAdminAddress,
                  atmInterfaceMyNeighborIpAddress,
                  atmInterfaceMyNeighborIfName }
            STATUS     deprecated
            DESCRIPTION
              "A collection of objects providing configuration
               information about an ATM interface."
            ::= { atmMIBGroups 1 }

     atmTrafficDescrGroup    OBJECT-GROUP
            OBJECTS {
                atmTrafficDescrType, atmTrafficDescrParam1,
                atmTrafficDescrParam2, atmTrafficDescrParam3,
                atmTrafficDescrParam4, atmTrafficDescrParam5,
                atmTrafficQoSClass, atmTrafficDescrRowStatus}
            STATUS     deprecated
            DESCRIPTION
               "A collection of objects providing information
                about ATM traffic descriptor type and
                the associated parameters."
            ::= { atmMIBGroups 2 }

     atmVpcTerminationGroup    OBJECT-GROUP
            OBJECTS  {atmVplOperStatus, atmVplAdminStatus,
                atmVplLastChange,
                atmVplReceiveTrafficDescrIndex,
                atmVplTransmitTrafficDescrIndex,
                atmVplRowStatus }
            STATUS     deprecated
            DESCRIPTION
               "A collection of objects providing
                information about a VPL at an ATM interface
                which terminates a VPC
                (i.e., one which is NOT cross-connected
                to other VPLs)."
            ::= { atmMIBGroups 5 }

     atmVccTerminationGroup    OBJECT-GROUP
            OBJECTS {atmVclOperStatus, atmVclAdminStatus,



Tesink                      Standards Track                    [Page 81]
^L
RFC 2515                 ATM Management Objects            February 1999


                atmVclLastChange,
                 atmVclReceiveTrafficDescrIndex,
                 atmVclTransmitTrafficDescrIndex,
                 atmVccAalType, atmVclRowStatus }
            STATUS     deprecated
            DESCRIPTION
               "A collection of objects providing information
                about a VCL at an ATM interface
                which terminates a VCC (i.e., one which is
                NOT cross-connected to other VCLs)."
            ::= { atmMIBGroups 6 }

     atmVpCrossConnectGroup    OBJECT-GROUP
            OBJECTS { atmVplReceiveTrafficDescrIndex,
                atmVplTransmitTrafficDescrIndex,
                atmVplOperStatus, atmVplRowStatus,
                atmVpCrossConnectAdminStatus,
                atmVpCrossConnectL2HOperStatus,
                atmVpCrossConnectH2LOperStatus,
                atmVpCrossConnectL2HLastChange,
                atmVpCrossConnectH2LLastChange,
                atmVpCrossConnectRowStatus,
                atmVplCrossConnectIdentifier,
                atmVpCrossConnectIndexNext }
            STATUS     deprecated
            DESCRIPTION
               "A collection of objects providing
                information about a VP cross-connect
                and the associated VPLs that are
                cross-connected together."
            ::= { atmMIBGroups 7 }

     atmVcCrossConnectGroup    OBJECT-GROUP
            OBJECTS { atmVclReceiveTrafficDescrIndex,
                atmVclTransmitTrafficDescrIndex,
                atmVclOperStatus, atmVclRowStatus,
                atmVcCrossConnectAdminStatus,
                atmVcCrossConnectL2HOperStatus,
                atmVcCrossConnectH2LOperStatus,
                atmVcCrossConnectL2HLastChange,
                atmVcCrossConnectH2LLastChange,
                atmVcCrossConnectRowStatus,
                atmVclCrossConnectIdentifier,
                atmVcCrossConnectIndexNext }
            STATUS     deprecated
            DESCRIPTION
               "A collection of objects providing
                information about a VC cross-connect



Tesink                      Standards Track                    [Page 82]
^L
RFC 2515                 ATM Management Objects            February 1999


                and the associated VCLs that are
                cross-connected together."
            ::= { atmMIBGroups 8 }


     -- {atmMIB 3} has been used by [19].

     END

10.  Acknowledgments

   This memo is the result of the work of the AToMMIB Working Group.

11.  References

   [1]  Harrington, D., Presuhn, R. and B. Wijnen, "An
        Architecture for Describing SNMP Management Frameworks", RFC
        2271, January 1998.

   [2]  Rose, M. and K. McCloghrie, "Structure and Identification of
        Management Information for TCP/IP-based Internets", STD 16, RFC
        1155, May 1990.

   [3]  Rose, M. and K. McCloghrie, "Concise MIB Definitions", STD 16,
        RFC 1212, March 1991.

   [4]  Rose, M., "A Convention for Defining Traps for use with the
        SNMP", RFC 1215, March 1991.

   [5]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.  and S.
        Waldbusser, "Structure of Management Information for Version 2
        of the Simple Network Management Protocol (SNMPv2)", RFC 1902,
        January 1996.

   [6]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.  and S.
        Waldbusser, "Textual Conventions for Version 2 of the Simple
        Network Management Protocol (SNMPv2)", RFC 1903, January 1996.

   [7]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.  and S.
        Waldbusser, "Conformance Statements for Version 2 of the Simple
        Network Management Protocol (SNMPv2)", RFC 1904, January 1996.

   [8]  Case, J., Fedor, M., Schoffstall, M. and J. Davin, "Simple
        Network Management Protocol", STD 15, RFC 1157, May 1990.

   [9]  SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.  and S.
        Waldbusser, "Introduction to Community-based SNMPv2", RFC 1901,
        January 1996.



Tesink                      Standards Track                    [Page 83]
^L
RFC 2515                 ATM Management Objects            February 1999


   [10] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.  and S.
        Waldbusser, "Transport Mappings for Version 2 of the Simple
        Network Management Protocol (SNMPv2)", RFC 1906, January 1996.

   [11] Case, J., Harrington D., Presuhn R. and B. Wijnen, "Message
        Processing and Dispatching for the Simple Network Management
        Protocol (SNMP)", RFC 2272, January 1998.

   [12] Blumenthal, U. and B. Wijnen, "User-based Security Model (USM)
        for version 3 of the Simple Network Management Protocol
        (SNMPv3)", RFC 2274, January 1998.

   [13] SNMPv2 Working Group, Case, J., McCloghrie, K., Rose, M.  and S.
        Waldbusser, "Protocol Operations for Version 2 of the Simple
        Network Management Protocol (SNMPv2)", RFC 1905, January 1996.

   [14] Levi, D., Meyer, P. and B. Stewart, MPv3 Applications", RFC
        2273, January 1998.

   [15] Wijnen, B., Presuhn, R. and K. McCloghrie, "View-based Access
        Control Model (VACM) for the Simple Network Management Protocol
        (SNMP)", RFC 2275, January 1998.

   [16] McCloghrie, K. and M. Rose, Editors, "Management Information
        Base for Network Management of TCP/IP-based internets: MIB-II",
        STD 17, RFC 1213, March 1991.

   [17] McCloghrie, K. and F. Kastenholz, "The Interfaces Group MIB",
        RFC 2233, November 1997.

   [18] Brown, T. and K. Tesink, "Definitions of Managed Objects for
        SMDS Interfaces", RFC 1694, May 1994.

   [19] Noto, M., Spiegel, E. and K. Tesink, Editors, "Definitions of
        Textual Conventions and OBJECT-IDENTITIES for ATM Management",
        RFC 2514, February 1999.

   [20] ATM Forum, ATM User-Network Interface, Version 3.0 (UNI 3.0)
        Specification, 1994.

   [21] ATM Forum, B-ICI Specification, Version 2.0, af-bici-0013.002,
        November 1995.

   [22] "ATM Forum Private Network-Network Interface Specification,
        Version 1.0 (PNNI 1.0)", af-sig-0055.000, March 1996.

   [23] "ATM Forum Integrated Local Management Interface (ILMI)
        Specification", Version 4.0", af-ilmi-0065.000, September 1996.



Tesink                      Standards Track                    [Page 84]
^L
RFC 2515                 ATM Management Objects            February 1999


   [24] Ahmed, M. and K. Tesink, "Definitions of Managed Objects for ATM
        Management Version 8.0 using SMIv2", RFC 1695, August 1994.

12.  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.

   The managed objects in this MIB contain sensitive information since,
   collectively, they allow tracing and influencing of virtual
   connections in ATM switches or networks and provide information of
   their traffic characteristics.

   It is thus important to control even GET access to these objects and
   possibly to even encrypt the values of these object when sending them
   over the network via SNMP. Not all versions of SNMP provide features
   for such a secure environment.

   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 2274 [12] and the View-based
   Access Control Model RFC 2275 [15] 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.

13.  Author's Address

   Kaj Tesink
   Bellcore
   331 Newman Springs Road
   P.O. Box 7020
   Red Bank, NJ  07701-7020

   Phone: (732) 758-5254
   EMail: kaj@bellcore.com



Tesink                      Standards Track                    [Page 85]
^L
RFC 2515                 ATM Management Objects            February 1999


14.  Intellectual Property

   The IETF takes no position regarding the validity or scope of any
   intellectual property 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; neither does it represent that it
   has made any effort to identify any such rights.  Information on the
   IETF's procedures with respect to rights in standards-track and
   standards-related documentation can be found in BCP-11.  Copies of
   claims of rights made available for publication 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 implementors or users of this specification can
   be obtained from the IETF Secretariat.

   The IETF invites any interested party to bring to its attention any
   copyrights, patents or patent applications, or other proprietary
   rights which may cover technology that may be required to practice
   this standard.  Please address the information to the IETF Executive
   Director.






























Tesink                      Standards Track                    [Page 86]
^L
RFC 2515                 ATM Management Objects            February 1999


15.  Full Copyright Statement

   Copyright (C) The Internet Society (1999).  All Rights Reserved.

   This document and translations of it may be copied and furnished to
   others, and derivative works that comment on or otherwise explain it
   or assist in its implementation may be prepared, copied, published
   and distributed, in whole or in part, without restriction of any
   kind, provided that the above copyright notice and this paragraph are
   included on all such copies and derivative works.  However, this
   document itself may not be modified in any way, such as by removing
   the copyright notice or references to the Internet Society or other
   Internet organizations, except as needed for the purpose of
   developing Internet standards in which case the procedures for
   copyrights defined in the Internet Standards process must be
   followed, or as required to translate it into languages other than
   English.

   The limited permissions granted above are perpetual and will not be
   revoked by the Internet Society or its successors or assigns.

   This document and the information contained herein is provided on an
   "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING
   TASK FORCE DISCLAIMS 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.
























Tesink                      Standards Track                    [Page 87]
^L