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Versions: 00 01 02 03 04 RFC 2266

Internet Draft          IEEE 802.12 Repeater MIB        December 18 1995


    Definitions of Managed Objects for IEEE 802.12 Repeater Devices


                           December 18, 1995

                               John Flick

                        Hewlett Packard Company
                     8000 Foothills Blvd. M/S 5556
                        Roseville, CA 95747-5556

                        johnf@hprnd.rose.hp.com

                 <draft-ietf-vgmib-repeater-dev-01.txt>


Status of this Memo

   This document is an Internet-Draft.  Internet-Drafts are working
   documents of the Internet Engineering Task Force (IETF), its areas,
   and its working groups.  Note that other groups may also distribute
   working documents as Internet-Drafts.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as ``work in progress.''

   To learn the current status of any Internet-Draft, please check the
   ``1id-abstracts.txt'' listing contained in the Internet-Drafts Shadow
   Directories on ftp.is.co.za (Africa), nic.nordu.net (Europe),
   munnari.oz.au (Pacific Rim), ds.internic.net (US East Coast), or
   ftp.isi.edu (US West Coast).















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1.  Abstract

   This memo defines an experimental portion of the Management
   Information Base (MIB) for use with network management protocols in
   TCP/IP-based internets.  In particular, it defines objects for
   managing network repeaters based on IEEE 802.12.


2.  Object Definitions

   Management information is viewed as a collection of managed objects,
   residing in a virtual information store, termed the Management
   Information Base (MIB).  Collections of related objects are defined
   in MIB modules.  MIB modules are written using a subset of Abstract
   Syntax Notation One (ASN.1) [1] termed the Structure of Management
   Information (SMI) [2].  In particular, each object type is named by
   an OBJECT IDENTIFIER, an administratively assigned name.  The object
   type together with an object instance serves to uniquely identify a
   specific instantiation of the object.  For human convenience, we
   often use a textual string, termed the descriptor, to refer to the
   object type.






























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3.  Overview

   Instances of these object types represent attributes of an IEEE
   802.12 repeater, as defined by Section 12, "RMAC Protocol" in IEEE
   Standard 802.12-1995 [6].

   The definitions presented here are based on Section 13, "Layer
   management functions and services", and Annex C, "GDMO Specifications
   for Demand Priority Managed Objects" of IEEE Standard 802.12-1995
   [6].  Implementors of these MIB objects should note that the IEEE
   document explicitly describes (in the form of Pascal pseudocode)
   when, where, and how various repeater attributes are measured.  The
   IEEE document also describes the effects of repeater actions that may
   be invoked by manipulating instances of the MIB objects defined here.

   The counters in this document are defined to be the same as those
   counters in IEEE Standard 802.12-1995, with the intention that the
   same instrumentation can be used to implement both the IEEE and IETF
   management standards.


3.1.  MAC Addresses

   All representations of MAC addresses in this MIB module are in
   "canonical" order defined by 802.1a, i.e., as if it were transmitted
   least significant bit first.  This is true even if the repeater is
   operating in token ring framing mode, which requires MAC addresses to
   be transmitted most significant bit first.























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3.2.  IEEE 802.12 Training Frames

   Training frames are special MAC frames that are used only during link
   initialization.  Training frames are initially constructed by the
   device at the lower end of a link.  The training frame format is as
   follows:

       +----+----+------------+--------------+----------+-----+
       | DA | SA | Req Config | Allow Config |   Data   | FCS |
       +----+----+------------+--------------+----------+-----+

               DA = destination address (six octets)
               SA = source address (six octets)
               Req Config = requested configuration (2 octets)
               Allow Config = allowed configuration (2 octets)
               Data = data (594 to 675 octets)
               FCS = frame check sequence (4 octets)

   Training frames are always sent with a null destination address.  To
   pass training, an end node must use its source address in the source
   address field of the training frame.  A repeater may use a non-null
   source address if it has one, or it may use a null source address.





























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   The requested configuration field allows the device at the lower end
   of a link to inform the device at the upper end of the link about
   itself and to request configuration options.  The training response
   frame from the device at the upper end of the link contains the
   requestor's requested configuration from the training request frame.
   The currently defined format of the requested configuration field as
   defined in the IEEE Standard 802.12-1995 standard is shown below.
   Please refer to the most current version of the IEEE document for a
   more up to date description of this field.  In particular, the
   reserved bits may be used in later versions of the standard.

       First Octet:       Second Octet:

        7 6 5 4 3 2 1 0    7 6 5 4 3 2 1 0
       +-+-+-+-+-+-+-+-+  +-+-+-+-+-+-+-+-+
       |v|v|v|r|r|r|r|r|  |r|r|r|F|F|P|P|R|
       +-+-+-+-+-+-+-+-+  +-+-+-+-+-+-+-+-+

       vvv: The version of the 802.12 training protocol with which
            the training initiator is compliant.  The current version
            is 100.
       r:   Reserved bits (set to zero)
       FF:  00 = frameType88023
            01 = frameType88025
            10 = reserved
            11 = frameTypeEither
       PP:  00 = singleAddressMode
            01 = promiscuousMode
            10 = reserved
            11 = reserved
       R:   0  = the training initiator is an end node
            1  = the training initiator is a repeater



















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   The allowed configuration field allows the training responder to
   respond with the allowed configuration.  The training initiator sets
   the contents of this field to all zero bits.  The training responder
   sets the allowed configuration field as follows:

       First Octet:       Second Octet:

        7 6 5 4 3 2 1 0    7 6 5 4 3 2 1 0
       +-+-+-+-+-+-+-+-+  +-+-+-+-+-+-+-+-+
       |v|v|v|D|C|N|r|r|  |r|r|r|F|F|P|P|R|
       +-+-+-+-+-+-+-+-+  +-+-+-+-+-+-+-+-+

       vvv: The version of the 802.12 training protocol with which
            the training responder is compliant.  The current version
            is 100.
       D:   0  = No duplicate address has been detected.
            1  = Duplicate address has been detected
       C:   0  = The requested configuration is compatible with the
                 network.
            1  = The requested configuration is not compatible with
                 the network.  In this case, the FF, PP, and R bits
                 indicate the configuration that would be allowed.
       N:   0  = Access will be allowed, providing the configuration
                 is compatible (C = 0).
            1  = Access is not granted because of security
                 restrictions
       r:   Reserved bits (set to zero)
       FF:  00 = frameType88023 will be used
            01 = frameType88025 will be used
            10 = reserved
            11 = reserved
       PP:  00 = singleAddressMode
            01 = promiscuousMode
            10 = reserved
            11 = reserved
       R:   0  = Requested access as an end node is allowed
            1  = Requested access as a repeater is allowed

   Again, note that the most recent version of the IEEE 802.12 standard
   should be consulted for the most up to date definition of the
   requested configuration and allowed configuration fields.

   The data field contains between 594 and 675 octets and is filled in
   by the training initiator.  The first 55 octets may be used for
   vendor specific protocol information.  The remaining octets are all
   zeros.  The length of the training frame combined with the
   requirement that 24 consecutive training frames be received without
   error to complete training ensures that marginal links will not



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   complete training.


3.3.  Structure of the MIB

   Objects in this MIB are arranged into MIB groups.  Each MIB group is
   organized as a set of related objects.

3.3.1.  The Basic Group Definitions

   This group contains the objects which are applicable to all
   repeaters.  It contains status, parameter and control objects for
   each repeater within the managed system, for the port groups within
   the system, and for the individual ports themselves.

3.3.2.  The Monitor Group Definitions

   This group contains monitoring statistics for each repeater within
   the system and for individual ports.

3.3.3.  The Address Tracking Group Definitions

   This group contains objects for tracking the MAC addresses of the
   DTEs attached to the ports within the system.


3.4.  Relationship to other MIBs

   It is assumed that a repeater implementing this MIB will also
   implement (at least) the 'system' group defined in MIB-II [5].


3.4.1.  Relationship to the 'system' group

   In MIB-II, the 'system' group is defined as being mandatory for all
   systems such that each managed entity contains one instance of each
   object in the 'system' group.  Thus, those objects apply to the
   entity even if the entity's sole functionality is management of
   repeaters.


3.4.2.  Relationship to the 'interfaces' group

   In MIB-II, the 'interfaces' group is defined as being mandatory for
   all systems and contains information on an entity's interfaces, where
   each interface is thought of as being attached to a the Internet
   suite of protocols.)




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   This MIB uses the notion of ports on a repeater.  The concept of a
   MIB-II interface has NO specific relationship to a repeater's port.
   Therefore, the 'interfaces' group applies only to the one (or more)
   network interfaces on which the entity managing the repeater sends
   and receives management protocol operations, and does not apply to
   the repeater's ports.


3.5.  Mapping of IEEE 802.12 Managed Objects

   IEEE 802.12 Managed Object           Corresponding SNMP Object

   oRepeater
     .aCurrentFramingType               vgRptrInfoCurrentFramingType
     .aDesiredFramingType               vgRptrInfoDesiredFramingType
     .aFramingCapability                vgRptrInfoFramingCapability
     .aGroupMap                         <none>
     .aMACAddress                       vgRptrInfoMACAddress
     .aRepeaterGroupCapacity            <none>
     .aRepeaterHealthData               <none>
     .aRepeaterHealthState              vgRptrInfoOperStatus
     .aRepeaterHealthText               <none>
     .aRepeaterID                       vgRptrInfoIndex
     .aRepeaterSearchAddress            vgRptrAddrSearchAddress
     .aRepeaterSearchGroup              vgRptrAddrSearchGroup
     .aRepeaterSearchPort               vgRptrAddrSearchPort
     .aRepeaterSearchState              vgRptrAddrSearchState
     .aRMACVersion                      vgRptrInfoTrainingVersion
     .acExecuteNonDisruptiveSelfTest    <none>
     .acRepeaterSearchAddress           vgRptrAddrSearchAddress
     .acResetRepeater                   vgRptrInfoReset
     .nGroupMapChange                   vgRptrGroupChange
     .nRepeaterHealth                   vgRptrHealth
     .nRepeaterReset                    vgRptrResetEvent

   oGroup
     .aGroupCablesBundled               vgRptrGroupCablesBundled
     .aGroupID                          vgRptrGroupIndex
     .aGroupPortCapacity                vgRptrGroupPortCapacity
     .aPortMap                          <none>
     .nPortMapChange                    <none>

   oPort
     .aAllowableTrainingType            vgRptrPortAllowedTrainType
     .aBroadcastFramesReceived          vgRptrPortBroadcastFrames
     .aCentralMgmtDetectedDupAddr       vgRptrMgrDetectedDupAddress
     .aDataErrorFramesReceived          vgRptrPortDataErrorFrames
     .aHighPriorityFramesReceived       vgRptrPortHighPriorityFrames



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     .aHighPriorityOctetsReceived       vgRptrPortHighPriorityOctets or
                                        vgRptrPortHCHighPriorityOctets
     .aIPMFramesReceived                vgRptrPortIPMFrames
     .aLastTrainedAddress               vgRptrAddrLastTrainedAddress
     .aLastTrainingConfig               vgRptrPortLastTrainConfig
     .aLocalRptrDetectedDupAddr         vgRptrRptrDetectedDupAddress
     .aMediaType                        <not yet mapped>
                                        Tranceiver MIB issue
     .aMulticastFramesReceived          vgRptrPortMulticastFrames
     .aNormalPriorityFramesReceived     vgRptrPortNormPriorityFrames
     .aNormalPriorityOctetsReceived     vgRptrPortNormPriorityOctets or
                                        vgRptrPortHCNormPriorityOctets
     .aNullAddressedFramesReceived      vgRptrPortNullAddressedFrames
     .aOctetsInUnreadableFramesRcvd     vgRptrPortUnreadableOctets or
                                        vgRptrPortHCUnreadableOctets
     .aOversizeFramesReceived           vgRptrPortOversizeFrames
     .aPortAdministrativeState          vgRptrPortAdminStatus
     .aPortID                           vgRptrPortIndex
     .aPortStatus                       vgRptrPortStatus
     .aPortType                         vgRptrPortType
     .aPriorityEnable                   vgRptrPortPriorityEnable
     .aPriorityPromotions               vgRptrPortPriorityPromotions
     .aReadableFramesReceived           vgRptrPortReadableFrames
     .aReadableOctetsReceived           vgRptrPortReadableOctets or
                                        vgRptrPortHCReadableOctets
     .aSupportedCascadeMode             vgRptrPortSupportedCascadeMode
     .aSupportedPromiscMode             vgRptrPortSupportedPromiscMode
     .aTrainedAddressChanges            vgRptrAddrTrainedAddressChanges
     .aTrainingResult                   vgRptrPortTrainingResult
     .aTransitionsIntoTraining          vgRptrPortTransitionToTrainings
     .acPortAdministrativeControl       vgRptrPortAdminStatus




















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4.  Definitions

      DOT12-RPTR-MIB DEFINITIONS ::= BEGIN

          IMPORTS
              experimental, Integer32, Counter32, Counter64,
              OBJECT-TYPE, MODULE-IDENTITY, NOTIFICATION-TYPE
                  FROM SNMPv2-SMI
              DisplayString, MacAddress, TruthValue, TimeStamp,
              TestAndIncr
                  FROM SNMPv2-TC
              MODULE-COMPLIANCE, OBJECT-GROUP
                  FROM SNMPv2-CONF
              OwnerString
                  FROM IF-MIB;

          vgRptrMIB MODULE-IDENTITY
               LAST-UPDATED "9512152252Z"
               ORGANIZATION "IETF 100VG-AnyLAN Working Group"
               CONTACT-INFO
                       "       John Flick

                       Postal: Hewlett Packard Company
                               8000 Foothills Blvd. M/S 5556
                               Roseville, CA 95747-5556
                       Tel:    +1 916 785 4018
                       Fax:    +1 916 785 3583

                       E-mail: johnf@hprnd.rose.hp.com"
               DESCRIPTION
                       "This MIB module describes objects for managing
                       IEEE 802.12 repeaters."
               ::= { experimental 64 }


          vgRptrObjects      OBJECT IDENTIFIER ::= { vgRptrMIB 1 }

          vgRptrBasic        OBJECT IDENTIFIER ::= { vgRptrObjects 1 }
          vgRptrBasicRptr    OBJECT IDENTIFIER ::= { vgRptrBasic 1 }

          -- Note: { vgRptrBasicRptr 1 } to { vgRptrBasicRptr 10 }
          -- were used in an earlier version of this draft for
          -- repeater-wide scalar objects.  With the change in the
          -- model to allow multiple repeaters, they have been moved
          -- into the following table.  This table should be moved
          -- to { vgRptrBasicRptr 1 } when this draft is published
          -- as an RFC.




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          vgRptrInfoTable OBJECT-TYPE
              SYNTAX     SEQUENCE OF VgRptrInfoEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "A table of information about each non-trivial
                      802.12 repeater in the managed system."
              ::= { vgRptrBasicRptr 11 }

          vgRptrInfoEntry OBJECT-TYPE
              SYNTAX     VgRptrInfoEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "An entry in the table, containing information
                      about a single, non-trivial repeater."
              INDEX      { vgRptrInfoIndex }
              ::= { vgRptrInfoTable 1 }

          VgRptrInfoEntry ::=
              SEQUENCE {
                  vgRptrInfoIndex                 Integer32,
                  vgRptrInfoMACAddress            MacAddress,
                  vgRptrInfoCurrentFramingType    INTEGER,
                  vgRptrInfoDesiredFramingType    INTEGER,
                  vgRptrInfoFramingCapability     INTEGER,
                  vgRptrInfoTrainingVersion       INTEGER,
                  vgRptrInfoOperStatus            INTEGER,
                  vgRptrInfoReset                 INTEGER,
                  vgRptrInfoLastChange            TimeStamp
              }

          vgRptrInfoIndex OBJECT-TYPE
              SYNTAX     Integer32 (1..2147483647)
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "A unique identifier for the repeater for which
                      this entry contains information.  The numbering
                      scheme for repeaters is implementation specific."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.2.1,
                      aRepeaterID."
              ::= { vgRptrInfoEntry 1 }

          vgRptrInfoMACAddress OBJECT-TYPE
              SYNTAX     MacAddress
              MAX-ACCESS read-only



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              STATUS     current
              DESCRIPTION
                      "The MAC address used by the repeater when it
                      initiates training on the uplink port.  Repeaters
                      are allowed to train with an assigned MAC address
                      or a null (all zeroes) MAC address."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.2.1,
                      aMACAddress."
              ::= { vgRptrInfoEntry 2 }

          vgRptrInfoCurrentFramingType OBJECT-TYPE
              SYNTAX     INTEGER {
                             frameType88023(1),
                             frameType88025(2)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The type of framing (802.3 or 802.5) currently
                      in use by the repeater."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.2.1,
                      aCurrentFramingType."
              ::= { vgRptrInfoEntry 3 }

          vgRptrInfoDesiredFramingType OBJECT-TYPE
              SYNTAX     INTEGER {
                             frameType88023(1),
                             frameType88025(2)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "The type of framing which will be used by the
                      repeater after the next time it is reset.  The
                      value of this object should be preserved across
                      repeater resets and power failures"
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.2.1,
                      aDesiredFramingType."
              ::= { vgRptrInfoEntry 4 }

          vgRptrInfoFramingCapability OBJECT-TYPE
              SYNTAX     INTEGER {
                             frameType88023(1),
                             frameType88025(2),
                             frameTypeEither(3)



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                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The type of framing this repeater is capable of
                      supporting."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.2.1,
                      aFramingCapability."
              ::= { vgRptrInfoEntry 5 }

          vgRptrInfoTrainingVersion OBJECT-TYPE
              SYNTAX     INTEGER (0..7)
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The highest version bits (vvv bits) supported by
                      the repeater during training."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.2.1,
                      aRMACVersion."
              ::= { vgRptrInfoEntry 6 }

          vgRptrInfoOperStatus OBJECT-TYPE
              SYNTAX     INTEGER {
                             ok(2),
                             generalFailure(6)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The vgRptrInfoOperStatus object indicates the
                      operational state of the repeater."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.2.1,
                      aRepeaterHealthState."
              ::= { vgRptrInfoEntry 7 }

          vgRptrInfoReset OBJECT-TYPE
              SYNTAX     INTEGER {
                             noReset(1),
                             reset(2)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "Setting this object to reset(2) causes the
                      repeater to transition to its initial state as



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                      specified in clause 12 [IEEE Std 802.12].

                      Setting this object to noReset(1) has no effect.
                      The agent will always return the value noReset(1)
                      when this object is read.

                      After receiving a request to set this variable to
                      reset(2), the agent is allowed to delay the reset
                      for a short period.  For example, the implementor
                      may choose to delay the reset long enough to
                      allow the SNMP response to be transmitted.  In
                      any event, the SNMP response must be transmitted.

                      This action does not reset the management
                      counters defined in this document nor does it
                      affect the vgRptrPortAdminStatus parameters.
                      Included in this action is the execution of a
                      disruptive Self-Test with the following
                      characteristics:

                          1) The nature of the tests is not specified.
                          2) The test resets the repeater but without
                            affecting configurable management
                            information about the repeater.
                          3) Packets received during the test may or
                             may not be transferred.
                          4) The test does not interfere with
                             management functions.

                      After performing this self-test, the agent will
                      update the repeater health information (including
                      vgRptrInfoOperStatus), and send a
                      vgRptrResetEvent."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.2.2,
                      acResetRepeater."
              ::= { vgRptrInfoEntry 8 }

          vgRptrInfoLastChange OBJECT-TYPE
              SYNTAX     TimeStamp
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The value of sysUpTime when any of the following
                      conditions occurred:

                          1) agent cold- or warm-started;
                          2) this instance of repeater was created



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                             (such as when a device or module was
                             added to the system);
                          3) a change in the value of
                             vgRptrInfoOperStatus;
                          4) ports were added or removed as members of
                             the repeater; or
                          5) any of the counters associated with this
                             repeater had a discontinuity."
              ::= { vgRptrInfoEntry 9 }

          vgRptrBasicGroup  OBJECT IDENTIFIER ::= { vgRptrBasic 2 }

          vgRptrBasicGroupTable OBJECT-TYPE
              SYNTAX     SEQUENCE OF VgRptrBasicGroupEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "A table containing information about groups of
                      ports."
              ::= { vgRptrBasicGroup 1 }

          vgRptrBasicGroupEntry OBJECT-TYPE
              SYNTAX     VgRptrBasicGroupEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "An entry in the vgRptrBasicGroupTable, containing
                      information about a single group of ports."
              INDEX      { vgRptrGroupIndex }
              ::= { vgRptrBasicGroupTable 1 }

          VgRptrBasicGroupEntry ::=
              SEQUENCE {
                  vgRptrGroupIndex                Integer32,
                  vgRptrGroupDescr                DisplayString,
                  vgRptrGroupObjectID             OBJECT IDENTIFIER,
                  vgRptrGroupOperStatus           INTEGER,
                  vgRptrGroupLastOperStatusChange TimeStamp,
                  vgRptrGroupPortCapacity         Integer32,
                  vgRptrGroupCablesBundled        INTEGER
              }

          vgRptrGroupIndex OBJECT-TYPE
              SYNTAX     Integer32 (1..2146483647)
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "This object identifies the group within the



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                      system for which this entry contains information.
                      The numbering scheme for groups is implementation
                      specific."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.4.1,
                      aGroupID."
              ::= { vgRptrBasicGroupEntry 1 }

          vgRptrGroupDescr OBJECT-TYPE
              SYNTAX     DisplayString (SIZE (0..255))
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "A textual description of the group.  This value
                      should include the full name and version
                      identification of the group's hardware type and
                      indicate how the group is differentiated from
                      other types of groups in the system.  'Plug-in
                      Module, Rev A' or 'Barney Rubble 100BaseVG 4-port
                      socket Version 2.1' are examples of valid group
                      descriptions.

                      It is mandatory that this only contain printable
                      ASCII characters."
              ::= { vgRptrBasicGroupEntry 2 }

          vgRptrGroupObjectID OBJECT-TYPE
              SYNTAX     OBJECT IDENTIFIER
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The vendor's authoritative identification of the
                      group.  This value may be allocated within the
                      SMI enterprises subtree (1.3.6.1.4.1) and
                      provides a straight-forward and unambiguous means
                      for determining what kind of group is being
                      managed.

                      For example, this object could take the value
                      1.3.6.1.4.1.4242.1.2.14 if vendor 'Flintstones,
                      Inc.' was assigned the subtree 1.3.6.1.4.1.4242,
                      and had assigned the identifier
                      1.3.6.1.4.1.4242.1.2.14 to its 'Wilma Flintstone
                      6-Port Plug-in Module.'"
              ::= { vgRptrBasicGroupEntry 3 }

          vgRptrGroupOperStatus OBJECT-TYPE
              SYNTAX     INTEGER {



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                             other(1),
                             operational(2),
                             malfunctioning(3),
                             notPresent(4),
                             underTest(5),
                             resetInProgress(6)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "An object that indicates the operational status
                      of the group.

                      A status of notPresent(4) indicates that the
                      group is temporarily or permanently physically
                      and/or logically not a part of the system.  It
                      is an implementation-specific matter as to
                      whether the agent effectively removes notPresent
                      entries from the table.

                      A status of operational(2) indicates that the
                      group is functioning, and a status of
                      malfunctioning(3) indicates that the group is
                      malfunctioning in some way."
              ::= { vgRptrBasicGroupEntry 4 }

          vgRptrGroupLastOperStatusChange OBJECT-TYPE
              SYNTAX     TimeStamp
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "An object that contains the value of sysUpTime
                      at the time that the value of the
                      vgRptrGroupOperStatus object for this group last
                      changed.

                      A value of zero indicates that the group's
                      operational status has not changed since the
                      agent last restarted."
              ::= { vgRptrBasicGroupEntry 5 }

          vgRptrGroupPortCapacity OBJECT-TYPE
              SYNTAX     Integer32 (1..2146483647)
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The vgRptrGroupPortCapacity is the number of
                      ports that can be contained within the group.



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                      Valid range is 1-2147483647.  Within each group,
                      the ports are uniquely numbered in the range from
                      1 to vgRptrGroupPortCapacity.

                      Some ports may not be present in the system, in
                      which case the actual number of ports present will
                      be less than the value of vgRptrGroupPortCapacity.
                      The number of ports present is never greater than
                      the value of vgRptrGroupPortCapacity.

                      Note:  In practice, this will generally be the
                      number of ports on a module, card, or board, and
                      the port numbers will correspond to numbers marked
                      on the physical embodiment."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.4.1,
                      aGroupPortCapacity."
              ::= { vgRptrBasicGroupEntry 6 }

          vgRptrGroupCablesBundled OBJECT-TYPE
              SYNTAX     INTEGER {
                             someCablesBundled(1),
                             noCablesBundled(2)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "This configuration flag is used to select either
                      bundled or unbundled cabling.  When this flag is
                      'someCablesBundled(1)' and the port is not
                      promiscuous or cascaded, frames received from
                      ports on this group and destined to go out
                      multiple ports on this group will be buffered
                      completely before being repeated out ports on
                      this group.  When this flag is
                      'noCablesBundled(2)' or the port is promiscuous
                      or cascaded, these frames will be repeated out
                      ports on this group as the frame is being
                      received.

                      Note that the value 'someCablesBundled(1)' will
                      work in the vast majority of all installations,
                      regardless of whether or not any cables are
                      physically in a bundle, since promiscuous and
                      cascaded ports automatically avoid the store and
                      forward.  The main situation in which
                      'noCablesBundled(2)' is beneficial is when there
                      is a large amount of multicast traffic and the



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                      cables are not in a bundle.  The value of this
                      object should be preserved across repeater resets
                      and power failures."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.4.1,
                      aGroupCablesBundled."
              ::= { vgRptrBasicGroupEntry 7 }

          vgRptrBasicPort   OBJECT IDENTIFIER ::= { vgRptrBasic 3 }

          vgRptrBasicPortTable OBJECT-TYPE
              SYNTAX     SEQUENCE OF VgRptrBasicPortEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "A table containing configuration and status
                      information about 802.12 repeater ports in the
                      system.  The number of entries is independent of
                      the number of repeaters in the managed system."
              ::= { vgRptrBasicPort 1 }

          vgRptrBasicPortEntry OBJECT-TYPE
              SYNTAX     VgRptrBasicPortEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "An entry in the vgRptrBasicPortTable, containing
                      information about a single port."
              INDEX      { vgRptrGroupIndex, vgRptrPortIndex }
              ::= { vgRptrBasicPortTable 1 }

          VgRptrBasicPortEntry ::=
              SEQUENCE {
                  vgRptrPortIndex                 Integer32,
                  vgRptrPortType                  INTEGER,
                  vgRptrPortAdminStatus           INTEGER,
                  vgRptrPortOperStatus            INTEGER,
                  vgRptrPortSupportedPromiscMode  INTEGER,
                  vgRptrPortSupportedCascadeMode  INTEGER,
                  vgRptrPortAllowedTrainType      INTEGER,
                  vgRptrPortLastTrainConfig       OCTET STRING,
                  vgRptrPortTrainingResult        OCTET STRING,
                  vgRptrPortPriorityEnable        TruthValue,
                  vgRptrPortRptrInfoIndex         Integer32
              }

          vgRptrPortIndex OBJECT-TYPE
              SYNTAX     Integer32 (1..2147483647)



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              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "This object identifies the port within the group
                      for which this entry contains information.  This
                      identifies the port independently from the
                      repeater it may be attached to.  The numbering
                      scheme for ports is implementation specific;
                      however, this value can never be greater than
                      vgRptrGroupPortCapacity for the associated group."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aPortID."
              ::= { vgRptrBasicPortEntry 1 }

          vgRptrPortType OBJECT-TYPE
              SYNTAX     INTEGER {
                             cascadeExternal(1),
                             cascadeInternal(2),
                             localExternal(3),
                             localInternal(4)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "Describes the type of port.  One of the
                      following:

                          cascadeExternal - Port is an uplink with
                                            physical connections which
                                            are externally visible
                          cascadeInternal - Port is an uplink with
                                            physical connections which
                                            are not externally visible,
                                            such as a connection to an
                                            internal backplane in a
                                            chassis
                          localExternal   - Port is a downlink or local
                                            port with externally
                                            visible connections
                          localInternal   - Port is a downlink or local
                                            port with connections which
                                            are not externally visible,
                                            such as a connection to an
                                            internal agent

                      'internal' is used to identify ports which place
                      traffic into the repeater, but do not have any



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                      external connections.  Note that both DTE and
                      cascaded repeater downlinks are considered
                      'local' ports."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aPortType."
              ::= { vgRptrBasicPortEntry 2 }

          vgRptrPortAdminStatus OBJECT-TYPE
              SYNTAX     INTEGER {
                             enabled(1),
                             disabled(2)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "Port enable/disable function.  Enabling a
                      disabled port will cause training to be
                      initiated.  Setting this object to disabled(2)
                      disables the port.

                      A disabled port neither transmits nor receives.
                      Once disabled, a port must be explicitly enabled
                      to restore operation.  A port which is disabled
                      when power is lost or when a reset is exerted
                      shall remain disabled when normal operation
                      resumes."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aPortAdministrativeState."
              ::= { vgRptrBasicPortEntry 3 }

          vgRptrPortOperStatus OBJECT-TYPE
              SYNTAX     INTEGER {
                             active(1),
                             inactive(2),
                             training(3)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "Current status for the port as specified by the
                      PORT_META_STATE in the port process module of
                      clause 12 [IEEE Std 802.12].

                      During initialization or any link warning
                      conditions, vgRptrPortStatus will be
                      'inactive(2)'.



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                      When Training_Up is received by the repeater on a
                      local port (or when Training_Down is received on
                      a cascade port), vgRptrPortStatus will change to
                      'training(3)' and vgRptrTrainingResult can be
                      monitored to see the detailed status regarding
                      training.

                      When 24 consecutive good FCS packets are received
                      and the configuration bits are OK,
                      vgRptrPortStatus will change to 'active(1)'.

                      A disabled port shall have a port status of
                      'inactive(2)'."
              REFERENCE
                      "IEEE Standard 802.12, 13.2.4.5.1,
                      aPortStatus."
              ::= { vgRptrBasicPortEntry 4 }

          vgRptrPortSupportedPromiscMode OBJECT-TYPE
              SYNTAX     INTEGER {
                             singleModeOnly(1),
                             singleOrPromiscMode(2),
                             promiscModeOnly(3)
                         }
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object describes whether the port hardware
                      is capable of supporting promiscuous mode, single
                      address mode (i.e., repeater filters unicasts not
                      addressed to the end station attached to this
                      port), or both.  A port for which vgRptrPortType
                      is equal to 'cascadeInternal' or 'cascadeExternal'
                      will always have a value of 'promiscModeOnly' for
                      this object."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aSupportedPromiscMode."
              ::= { vgRptrBasicPortEntry 5 }

          vgRptrPortSupportedCascadeMode OBJECT-TYPE
              SYNTAX     INTEGER {
                             endNodesOnly(1),
                             endNodesOrRepeaters(2),
                             cascadePort(3)
                         }
              MAX-ACCESS read-only
              STATUS     current



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              DESCRIPTION
                      "This object describes whether the port hardware
                      is capable of supporting cascaded repeaters, end
                      nodes, or both.  A port for which vgRptrPortType
                      is equal to 'cascadeInternal' or
                      'cascadeExternal' will always have a value of
                      'cascadePort' for this object."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aSupportedCascadeMode."
              ::= { vgRptrBasicPortEntry 6 }

          vgRptrPortAllowedTrainType OBJECT-TYPE
              SYNTAX     INTEGER {
                             allowEndNodesOnly(1),
                             allowPromiscuousEndNodes(2),
                             allowEndNodesOrRepeaters(3),
                             allowAnything(4)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "This security object is set by the network
                      manager to configure what type of device is
                      permitted to connect to the port.  One of the
                      following values:

                          allowEndNodesOnly        - only non-
                                                     promiscuous end
                                                     nodes permitted.
                          allowPromiscuousEndNodes - promiscuous or
                                                     non-promiscuous
                                                     end nodes
                                                     permitted
                          allowEndNodesOrRepeaters - repeaters or non-
                                                     promiscuous end
                                                     nodes permitted
                          allowAnything            - repeaters,
                                                     promiscuous or
                                                     non-promiscuous
                                                     end nodes
                                                     permitted

                      For a port for which vgRptrPortType is equal to
                      'cascadeInternal' or 'cascadeExternal', the
                      corresponding instance of this object may not be
                      set to 'allowEndNodesOnly' or
                      'allowPromiscuousEndNodes'.



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                      The agent must reject a SET of this object if the
                      value includes no capabilities that are
                      supported by this port's hardware, as defined by
                      the values of the corresponding instances of
                      vgRptrPortSupportedPromiscMode and
                      vgRptrPortSupportedCascadeMode.

                      Note that vgRptrPortSupportPromiscMode and
                      vgRptrPortSupportedCascadeMode represent what the
                      port hardware is capable of supporting.
                      vgRptrPortAllowedTrainType is used for setting an
                      administrative policy for a port.  The actual set
                      of training configurations that will be allowed
                      to succeed on a port is the intersection of what
                      the hardware will support and what is
                      administratively allowed.  The above requirement
                      on what values may be set to this object says that
                      the intersection of what is supported and what is
                      allowed must be non-empty.  In other words, it
                      must not result in a situation in which nothing
                      would be allowed to train on that port.  However,
                      a value can be set to this object as long as the
                      combination of this object and what is supported
                      by the hardware would still leave at least one
                      configuration that could successfully train on the
                      port."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aAllowableTrainingType."
              ::= { vgRptrBasicPortEntry 7 }

          vgRptrPortLastTrainConfig OBJECT-TYPE
              SYNTAX     OCTET STRING (SIZE(2))
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This 16 bit field contains the requested
                      configuration field from the most recent
                      error-free training request frame sent by the end
                      node connected to the port.  For cascade ports,
                      this object contains the responder's allowed
                      configuration field from the most recent
                      error-free training response frame received in
                      response to training initiated by this repeater.
                      The format of the current version of this field is
                      described in section 3.2.  Please refer to the
                      most recent version of the IEEE 802.12 standard
                      for the most up-to-date definition of the format



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                      of this object."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aLastTrainingConfig."
              ::= { vgRptrBasicPortEntry 8 }

          vgRptrPortTrainingResult OBJECT-TYPE
              SYNTAX     OCTET STRING (SIZE(3))
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This 18 bit field is used to indicate the result
                      of training.  It contains two bits which indicate
                      if error-free training frames have been received,
                      and it also contains the 16 bits of the allowed
                      configuration field from the most recent
                      error-free training response frame on the port.

                        First Octet:    Second and Third Octets:
                        7 6 5 4 3 2 1 0
                       +-+-+-+-+-+-+-+-+-----------------------------+
                       |0|0|0|0|0|0|V|G| allowed configuration field |
                       +-+-+-+-+-+-+-+-+-----------------------------+

                          V:   Valid: set when at least one error-free
                               training frame has been received.
                               Indicates the 16 training configuration
                               bits in vgRptrPortLastTrainConfig and
                               vgRptrPortTrainingResult contain valid
                               information.  This bit is cleared when
                               vgRptrPortStatus transitions to the
                               'inactive' or 'training' state.
                          G:   LinkGood: indicates the link hardware is
                               OK.  Set if 24 consecutive error-free
                               training packets have been received.
                               Cleared when a training packet with
                               errors is received, or when
                               vgRptrPortStatus transitions to the
                               'inactive' or 'training' state.

                      The format of the current version of the allowed
                      configuration field is described in section 3.2.
                      Please refer to the most recent version of the
                      IEEE 802.12 standard for the most up-to-date
                      definition of the format of this field.

                      If the port is in training, a management station
                      can examine this object to see if any training



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                      packets have been passed successfully.  If there
                      have been any good training packets, the Valid
                      bit will be set and the management station can
                      examine the allowed configuration field to see if
                      there is a duplicate address, configuration, or
                      security problem.

                      Note that on a repeater local port, this repeater
                      generates the training response bits, while on
                      a cascade port, the higher level repeater
                      originated the training response bits."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aTrainingResult."
              ::= { vgRptrBasicPortEntry 9 }

          vgRptrPortPriorityEnable OBJECT-TYPE
              SYNTAX     TruthValue
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "A configuration flag used to determine whether
                      the repeater will service high priority requests
                      received on the port as high priority or normal
                      priority.  When 'false', high priority requests
                      on this port will be serviced as normal priority.
                      The value of this object should be preserved
                      across repeater resets and power failures.

                      The setting of this object has no effect on a
                      cascade port.  Also note that the setting of this
                      object has no effect on a port connected to a
                      cascaded repeater.  In both of these cases, this
                      setting is treated as always 'true'.  The value
                      'false' only has an effect when the port is a
                      localInternal or localExternal port connected to
                      an end node."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aPriorityEnable."
              ::= { vgRptrBasicPortEntry 10 }

          vgRptrPortRptrInfoIndex OBJECT-TYPE
              SYNTAX     Integer32 (0..2147483647)
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object identifies the repeater that this



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                      port is currently mapped to.  The repeater
                      identified by a particular value of this object
                      is the same as that identified by the same value
                      of vgRptrInfoIndex.  A value of zero indicates
                      that this port is not currently mapped to any
                      repeater."
              ::= { vgRptrBasicPortEntry 11 }


          vgRptrMonitor      OBJECT IDENTIFIER ::= { vgRptrObjects 2 }

          vgRptrMonRepeater  OBJECT IDENTIFIER ::= { vgRptrMonitor 1 }

          vgRptrMonitorTable OBJECT-TYPE
              SYNTAX     SEQUENCE OF VgRptrMonitorEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "A table of performance and error statistics for
                      each repeater in the system.  The instance of the
                      vgRptrInfoLastChange associated with a repeater
                      is used to indicate possible discontinuities of
                      the counters in this table that are associated
                      with the same repeater."
              ::= { vgRptrMonRepeater 1 }

          vgRptrMonitorEntry OBJECT-TYPE
              SYNTAX     VgRptrMonitorEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "An entry in the table, containing statistics
                      for a single repeater."
              INDEX      { vgRptrInfoIndex }
              ::= { vgRptrMonitorTable 1 }

          VgRptrMonitorEntry ::=
              SEQUENCE {
                  vgRptrMonTotalReadableFrames    Counter32,
                  vgRptrMonTotalReadableOctets    Counter32,
                  vgRptrMonTotalErrors            Counter32,
                  vgRptrMonHCTotalReadableOctets  Counter64
              }

          vgRptrMonTotalReadableFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current



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              DESCRIPTION
                      "The total number of good frames of valid frame
                      length that have been received on all ports in
                      this repeater.  If an implementation cannot
                      obtain a count of frames as seen by the repeater
                      itself, this counter may be implemented as the
                      summation of the values of the
                      vgRptrPortReadableFrames counters for all of the
                      ports in this repeater."
              ::= { vgRptrMonitorEntry 1 }

          vgRptrMonTotalReadableOctets OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The total number of octets contained in good
                      frames that have been received on all ports in
                      this repeater.  If an implementation cannot
                      obtain a count of octets as seen by the repeater
                      itself, this counter may be implemented as the
                      summation of the values of the
                      vgRptrPortReadableOctets counters for all of the
                      ports in this repeater.

                      Note that this counter will roll over very
                      quickly.  It is provided for backward
                      compatibility for Network Management protocols
                      that do not support 64 bit counters (e.g. SNMP
                      version 1)."
              ::= { vgRptrMonitorEntry 2 }

          vgRptrMonTotalErrors OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The total number of errors which have occurred on
                      all of the ports in this repeater.  If an
                      implementation cannot obtain a count of these
                      errors as seen by the repeater itself, this
                      counter may be implemented as the summation of the
                      values of the vgRptrPortIPMFrames,
                      vgRptrPortOversizeFrames, and
                      vgRptrPortDataErrorFrames counters for all of the
                      ports in this repeater."
              ::= { vgRptrMonitorEntry 3 }




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          vgRptrMonHCTotalReadableOctets OBJECT-TYPE
              SYNTAX     Counter64
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The total number of octets contained in good
                      frames that have been received on all ports in
                      this repeater.  If an implementation cannot
                      obtain a count of octets as seen by the repeater
                      itself, this counter may be implemented as the
                      summation of the values of the
                      vgRptrPortHCReadableOctets counters for all of the
                      ports in this repeater.

                      This counter is a 64 bit version of
                      vgRptrMonTotalOctets.  It should be used by
                      Network Management protocols which support 64 bit
                      counters (e.g. SNMPv2)."
              ::= { vgRptrMonitorEntry 4 }


          vgRptrMonGroup     OBJECT IDENTIFIER ::= { vgRptrMonitor 2 }
          -- Currently unused

          vgRptrMonPort      OBJECT IDENTIFIER ::= { vgRptrMonitor 3 }

          vgRptrMonPortTable OBJECT-TYPE
              SYNTAX     SEQUENCE OF VgRptrMonPortEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "A table of performance and error statistics for
                      the ports.  The columnar object
                      vgRptrPortLastChange is used to indicate possible
                      discontinuities of counter type columnar objects
                      in this table."
              ::= { vgRptrMonPort 1 }

          vgRptrMonPortEntry OBJECT-TYPE
              SYNTAX     VgRptrMonPortEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "An entry in the vgRptrMonPortTable, containing
                      performance and error statistics for a single
                      port."
              INDEX      { vgRptrGroupIndex, vgRptrPortIndex }
              ::= { vgRptrMonPortTable 1 }



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          VgRptrMonPortEntry ::=
              SEQUENCE {
                  vgRptrPortReadableFrames        Counter32,
                  vgRptrPortReadableOctets        Counter32,
                  vgRptrPortUnreadableOctets      Counter32,
                  vgRptrPortHighPriorityFrames    Counter32,
                  vgRptrPortHighPriorityOctets    Counter32,
                  vgRptrPortNormPriorityFrames    Counter32,
                  vgRptrPortNormPriorityOctets    Counter32,
                  vgRptrPortBroadcastFrames       Counter32,
                  vgRptrPortMulticastFrames       Counter32,
                  vgRptrPortNullAddressedFrames   Counter32,
                  vgRptrPortIPMFrames             Counter32,
                  vgRptrPortOversizeFrames        Counter32,
                  vgRptrPortDataErrorFrames       Counter32,
                  vgRptrPortPriorityPromotions    Counter32,
                  vgRptrPortTransitionToTrainings Counter32,
                  vgRptrPortHCReadableOctets      Counter64,
                  vgRptrPortHCUnreadableOctets    Counter64,
                  vgRptrPortHCHighPriorityOctets  Counter64,
                  vgRptrPortHCNormPriorityOctets  Counter64,
                  vgRptrPortLastChange            TimeStamp
              }

          vgRptrPortReadableFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is the number of good frames of
                      valid frame length that have been received on
                      this port.  This counter is incremented by one
                      for each frame received on the port which is not
                      counted by any of the following error counters:
                      vgRptrPortIPMFrames, vgRptrPortOversizeFrames,
                      vgRptrPortNullAddressedFrames, or
                      vgRptrPortDataErrorFrames."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aReadableFramesReceived."
              ::= { vgRptrMonPortEntry 1 }

          vgRptrPortReadableOctets OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of the number of octets



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                      contained in good frames that have been received
                      on this port.  This counter is incremented by
                      OctetCount for each frame received on this port
                      which has been determined to be a readable frame
                      (i.e. each frame counted by
                      vgRptrPortReadableFrames).

                      Note that this counter will roll over very
                      quickly.  It is provided for backward
                      compatibility for Network Management protocols
                      that do not support 64 bit counters (e.g. SNMP
                      version 1)."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aReadableOctetsReceived."
              ::= { vgRptrMonPortEntry 2 }

          vgRptrPortUnreadableOctets OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of the number of octets
                      contained in invalid frames that have been
                      received on this port.  This counter is
                      incremented by OctetCount for each frame received
                      on this port which is counted by
                      vgRptrPortIPMFrames, vgRptrPortOversizeFrames,
                      vgRptrPortNullAddressedFrames, or
                      vgRptrPortDataErrorFrames.  This counter can be
                      combined with vgRptrPortReadableOctets to
                      calculate network utilization.

                      Note that this counter will roll over very
                      quickly.  It is provided for backward
                      compatibility for Network Management protocols
                      that do not support 64 bit counters (e.g. SNMP
                      version 1)."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aOctetsInUnreadableFramesRcvd."
              ::= { vgRptrMonPortEntry 3 }

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



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                      "This object is a count of high priority frames
                      that have been received on this port.  This
                      counter is incremented by one for each high
                      priority frame received on this port.  This
                      counter includes both good and bad high priority
                      frames, as well as high priority training frames.
                      This counter does not include normal priority
                      frames which were priority promoted."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aHighPriorityFramesReceived."
              ::= { vgRptrMonPortEntry 4 }

          vgRptrPortHighPriorityOctets OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of the number of octets
                      contained in high priority frames that have been
                      received on this port.  This counter is
                      incremented by OctetCount for each frame received
                      on this port which is counted by
                      vgRptrPortHighPriorityFrames.

                      Note that this counter will roll over very
                      quickly.  It is provided for backward
                      compatibility for Network Management protocols
                      that do not support 64 bit counters (e.g. SNMP
                      version 1)."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aHighPriorityOctetsReceived."
              ::= { vgRptrMonPortEntry 5 }

          vgRptrPortNormPriorityFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of normal priority frames
                      that have been received on this port.  This
                      counter is incremented by one for each normal
                      priority frame received on this port. This
                      counter includes both good and bad normal
                      priority frames, as well as normal priority
                      training frames and normal priority frames which
                      were priority promoted."



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              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aNormalPriorityFramesReceived."
              ::= { vgRptrMonPortEntry 6 }

          vgRptrPortNormPriorityOctets OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of the number of octets
                      contained in normal priority frames that have
                      been received on this port.  This counter is
                      incremented by OctetCount for each frame received
                      on this port which is counted by
                      vgRptrPortNormPriorityFrames.

                      Note that this counter will roll over very
                      quickly.  It is provided for backward
                      compatibility for Network Management protocols
                      that do not support 64 bit counters (e.g. SNMP
                      version 1)."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aNormalPriorityOctetsReceived."
              ::= { vgRptrMonPortEntry 7 }

          vgRptrPortBroadcastFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of broadcast packets that
                      have been received on this port.  This counter is
                      incremented by one for each readable frame
                      received on this port whose destination MAC
                      address is the broadcast address.  Frames
                      counted by this counter are also counted by
                      vgRptrPortReadableFrames."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aBroadcastFramesReceived."
              ::= { vgRptrMonPortEntry 8 }

          vgRptrPortMulticastFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current



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              DESCRIPTION
                      "This object is a count of multicast packets that
                      have been received on this port.  This counter is
                      incremented by one for each readable frame
                      received on this port whose destination MAC
                      address has the group address bit set, but is not
                      the broadcast address.  Frames counted by this
                      counter are also counted by
                      vgRptrPortReadableFrames, but not by
                      vgRptrPortBroadcastFrames.  Note that when
                      value of the instance vgRptrInfoCurrentFramingType
                      for the repeater that this port is associated
                      with is equal to 'frameType88025', this count
                      includes packets addressed to functional
                      addresses."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aMulticastFramesReceived."
              ::= { vgRptrMonPortEntry 9 }

          vgRptrPortNullAddressedFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of null addressed packets
                      that have been received on this port.  This
                      counter is incremented by one for each frame
                      received on this port with a destination MAC
                      address consisting of all zero bits.  Both void
                      and training frames are included in this
                      counter."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aNullAddressedFramesReceived."
              ::= { vgRptrMonPortEntry 10 }

          vgRptrPortIPMFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of the number of frames
                      that have been received on this port with an
                      invalid packet marker and no PMI errors.  A
                      repeater will write an invalid packet marker to
                      the end of a frame containing errors as it is
                      forwarded through the repeater to the other



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                      ports.  This counter is incremented by one for
                      each frame received on this port which has had an
                      invalid packet marker added to the end of the
                      frame.

                      This counter indicates problems with remote cable
                      segments, as opposed to problems with cables
                      directly attached to this repeater."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aIPMFramesReceived."
              ::= { vgRptrMonPortEntry 11 }

          vgRptrPortOversizeFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of oversize frames
                      received on this port.  This counter is
                      incremented by one for each frame received on
                      this port whose OctetCount is larger than the
                      maximum legal frame size.

                      The frame size which causes this counter to
                      increment is dependent on the current value of
                      vgRptrInfoCurrentFramingType for the repeater that
                      the port is associated with.  When
                      vgRptrInfoCurrentFramingType is equal to
                      frameType88023 this counter will increment for
                      frames that are 1519 octets or larger.  When
                      vgRptrInfoCurrentFramingType is equal to
                      frameType88025 this counter will increment for
                      frames that are 4521 octets or larger."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aOversizeFramesReceived."
              ::= { vgRptrMonPortEntry 12 }

          vgRptrPortDataErrorFrames OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of errored frames
                      received on this port.  This counter is
                      incremented by one for each frame received on
                      this port with any of the following errors: bad



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                      FCS (with no IPM), PMI errors (excluding frames
                      with an IPM error as the only PMI error), or
                      undersize (with no IPM).  Does not include
                      packets counted by vgRptrPortIPMFrames,
                      vgRptrPortOversizeFrames, or
                      vgRptrPortNullAddressedFrames.

                      This counter indicates problems with the cable
                      directly attached to this repeater, while
                      vgRptrPortIPMFrames indicates problems with remote
                      cables attached to other repeaters."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aDataErrorFramesReceived."
              ::= { vgRptrMonPortEntry 13 }

          vgRptrPortPriorityPromotions OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This counter is incremented by one each time the
                      priority promotion timer has expired on this port
                      and a normal priority frame is priority
                      promoted."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aPriorityPromotions."
              ::= { vgRptrMonPortEntry 14 }

          vgRptrPortTransitionToTrainings OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This counter is incremented by one each time the
                      vgRptrPortStatus object for this port transitions
                      into the 'training' state."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aTransitionsIntoTraining."
              ::= { vgRptrMonPortEntry 15 }

          vgRptrPortHCReadableOctets OBJECT-TYPE
              SYNTAX     Counter64
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION



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                      "This object is a count of the number of octets
                      contained in good frames that have been received
                      on this port.  This counter is incremented by
                      OctetCount for each frame received on this port
                      which has been determined to be a readable frame
                      (i.e. each frame counted by
                      vgRptrPortReadableFrames).

                      This counter is a 64 bit version of
                      vgRptrPortReadableOctets.  It should be used by
                      Network Management protocols which support 64 bit
                      counters (e.g. SNMPv2)."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aReadableOctetsReceived."
              ::= { vgRptrMonPortEntry 16 }

          vgRptrPortHCUnreadableOctets OBJECT-TYPE
              SYNTAX     Counter64
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of the number of octets
                      contained in invalid frames that have been
                      received on this port.  This counter is
                      incremented by OctetCount for each frame received
                      on this port which is counted by
                      vgRptrPortIPMFrames, vgRptrPortOversizeFrames,
                      vgRptrPortNullAddressedFrames, or
                      vgRptrPortDataErrorFrames.  This counter can be
                      combined with vgRptrPortHCReadableOctets to
                      calculate network utilization.

                      This counter is a 64 bit version of
                      vgRptrPortUnreadableOctets.  It should be used by
                      Network Management protocols which support 64 bit
                      counters (e.g. SNMPv2)."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aOctetsInUnreadableFramesRcvd."
              ::= { vgRptrMonPortEntry 17 }

          vgRptrPortHCHighPriorityOctets OBJECT-TYPE
              SYNTAX     Counter64
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of the number of octets



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                      contained in high priority frames that have been
                      received on this port.  This counter is
                      incremented by OctetCount for each frame received
                      on this port which is counted by
                      vgRptrPortHighPriorityFrames.

                      This counter is a 64 bit version of
                      vgRptrPortHighPriorityOctets.  It should be used
                      by Network Management protocols which support 64
                      bit counters (e.g. SNMPv2)."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aHighPriorityOctetsReceived."
              ::= { vgRptrMonPortEntry 18 }

          vgRptrPortHCNormPriorityOctets OBJECT-TYPE
              SYNTAX     Counter64
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is a count of the number of octets
                      contained in normal priority frames that have
                      been received on this port.  This counter is
                      incremented by OctetCount for each frame received
                      on this port which is counted by
                      vgRptrPortNormPriorityFrames.

                      This counter is a 64 bit version of
                      vgRptrPortNormPriorityOctets.  It should be used
                      by Network Management protocols which support 64
                      bit counters (e.g. SNMPv2)."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aNormalPriorityOctetsReceived."
              ::= { vgRptrMonPortEntry 19 }

          vgRptrPortLastChange OBJECT-TYPE
              SYNTAX     TimeStamp
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The value of sysUpTime when the last of the
                      following occurred:
                        1) the agent cold- or warm-started;
                        2) the row for the port was created
                           (such as when a device or module was
                           added to the system); or
                        3) any condition that would cause one of



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                           the counters for the row to experience
                           a discontinuity."
              ::= { vgRptrMonPortEntry 20 }


          vgRptrAddrTrack   OBJECT IDENTIFIER ::= { vgRptrObjects 3 }

          vgRptrAddrTrackRptr
              OBJECT IDENTIFIER ::= { vgRptrAddrTrack 1 }

          vgRptrAddrSearch
              OBJECT IDENTIFIER ::= { vgRptrAddrTrackRptr 1 }

          -- Note: { vgRptrAddrSearch 1 } to { vgRptrAddrSearch 4 }
          -- were used in an earlier version of this draft for
          -- repeater-wide scalar objects.  With the change in the
          -- model to allow multiple repeaters, they have been moved
          -- into the following table.  This table should be moved to
          -- { vgRptrAddrSearch 1 } when this draft is published as
          -- an RFC.

          vgRptrAddrSearchTable OBJECT-TYPE
              SYNTAX     SEQUENCE OF VgRptrAddrSearchEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "This table contains one entry per repeater in the
                      system.  It defines objects which allow a network
                      management application to instruct an agent to
                      watch for a given MAC address and report which
                      port it was seen on.  Only one address search can
                      be in progress on each repeater at any one time.
                      Before starting an address search, a management
                      application should obtain 'ownership' of the entry
                      in vgRptrAddrSearchTable for the repeater that is
                      to perform the search.  This is accomplished with
                      the vgRptrAddrSearchLock and
                      vgRptrAddrSearchStatus as follows:

                      try_again:
                          get(vgRptrAddrSearchLock,
                              vgRptrAddrSearchStatus)
                          while (vgRptrAddrSearchStatus != notInUse)
                          {
                              /* Wait for objects to be available */
                              short delay
                              get(vgRptrAddrSearchLock,
                                  vgRptrAddrSearchStatus)



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                          }

                          /* Try to claim map objects */
                          lock_value = vgRptrAddrSearchLock
                          if ( set(vgRptrAddrSearchLock = lock_value,
                                   vgRptrAddrSearchStatus = inUse,
                                   vgRptrAddrSearchOwner = 'my-address')
                                == FAILURE)
                              /* Another manager got the lock */
                              goto try_again

                          /* I have the lock */
                          set(vgRptrAddrSearchAddress = <search target>)

                          wait for vgRptrAddrSearchState to change from
                          none

                          if (vgRptrAddrASearchState == single)
                              get (vgRptrAddrSearchGroup,
                                   vgRptrAddrSearchPort)

                          /* release the lock, making sure not to
                             overwrite anyone else's lock */
                          set (vgRptrAddrSearchLock = lock_value+1,
                               vgRptrAddrSearchStatus = notInUse,
                               vgRptrAddrSearchOwner = '')

                      A management station first retrieves the values of
                      the appropriate instances of the
                      vgRptrAddrSearchLock and vgRptrAddrSearchStatus
                      objects, periodically repeating the retrieval if
                      necessary, until the value of
                      vgRptrAddrSearchStatus is 'notInUse'.  The
                      management station then tries to set the same
                      instance of the vgRptrAddrSearchLock object to the
                      value it just retrieved, the same instance of the
                      vgRptrAddrSearchStatus object to 'inUse', and the
                      corresponding instance of vgRptrAddrSearchOwner to
                      a value indicating itself.  If the set operation
                      succeeds, then the management station has obtained
                      ownership of the vgRptrAddrSearchEntry, and the
                      value of vgRptrAddrSearchLock is incremented by
                      the agent (as per the semantics of TestAndIncr).
                      Failure of the set operation indicates that some
                      other manager has obtained ownership of the
                      vgRptrAddrSearchEntry.

                      Once ownership is obtained, the management station



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                      can proceed with the search operation.  Note that
                      the agent will reset vgRptrAddrSearchStatus to
                      'notInUse' if it has been in the 'inUse' state
                      for an abnormally long period of time, to prevent
                      a misbehaving manager from permanently locking the
                      entry.  It is suggested that this timeout period
                      be between one and five minutes.

                      When the management station has completed its
                      search operation, it should free the entry by
                      setting the instance of the vgRptrAddrSearchLock
                      object to the previous value + 1, the instance of
                      the vgRptrAddrSearchStatus to 'notInUse', and the
                      instance of vgRptrAddrSearchOwner to a zero length
                      string.  This is done to prevent overwriting
                      another station's lock."
              ::= { vgRptrAddrSearch 5 }

          vgRptrAddrSearchEntry OBJECT-TYPE
              SYNTAX     VgRptrAddrSearchEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                      "An entry containing objects for invoking an
                      address search on a repeater."
              INDEX      { vgRptrInfoIndex }
              ::= { vgRptrAddrSearchTable 1 }

          VgRptrAddrSearchEntry ::=
              SEQUENCE {
                  vgRptrAddrSearchLock           TestAndIncr,
                  vgRptrAddrSearchStatus         INTEGER,
                  vgRptrAddrSearchAddress        MacAddress,
                  vgRptrAddrSearchState          INTEGER,
                  vgRptrAddrSearchGroup          Integer32,
                  vgRptrAddrSearchPort           Integer32,
                  vgRptrAddrSearchOwner          OwnerString
              }


          vgRptrAddrSearchLock OBJECT-TYPE
              SYNTAX     TestAndIncr
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "This object is used by a management station as an
                      advisory lock for this vgRptrAddrSearchEntry."
              ::= { vgRptrAddrSearchEntry 1 }



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          vgRptrAddrSearchStatus  OBJECT-TYPE
              SYNTAX     INTEGER {
                             notInUse(1),
                             inUse(2)
                         }
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "This object is used to indicate that some
                      management station is currently using this
                      vgRptrAddrSearchEntry.  Cooperating managers
                      should set this object to 'notInUse' when they are
                      finished using this entry.  The agent will
                      automatically set the value of this object to
                      'notInUse' if it has been set to 'inUse' for an
                      unusually long period of time."
              ::= { vgRptrAddrSearchEntry 2 }

          vgRptrAddrSearchAddress OBJECT-TYPE
              SYNTAX     MacAddress
              MAX-ACCESS read-write
              STATUS     current
              DESCRIPTION
                      "This object is used to search for a specified MAC
                      address.  When this object is set, an address
                      search begins.  This automatically sets the
                      corresponding instance of the
                      vgRptrAddrSearchState object  to 'none' and the
                      corresponding instances of the
                      vgRptrAddrSearchGroup and vgRptrAddrSearchPort
                      objects to 0.

                      When a valid frame is received by this repeater
                      with a source MAC address which matches the
                      current value of vgRptrAddrSearchAddress, the
                      agent will update the corresponding instances of
                      vgRptrAddrSearchState, vgRptrAddrSearchGroup and
                      vgRptrAddrSearchPort to reflect the current status
                      of the search, and the group and port on which
                      the frame was seen."
              ::= { vgRptrAddrSearchEntry 3 }

          vgRptrAddrSearchState OBJECT-TYPE
              SYNTAX     INTEGER {
                              none(1),
                              single(2),
                              multiple(3)
                         }



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              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The current state of the MAC address search on
                      this repeater.  This object is initialized to
                      'none' when the corresponding instance of
                      vgRptrAddrSearchAddress is set.  If the agent
                      detects the address on exactly one port, it will
                      set this object to 'single', and set the
                      corresponding instances of vgRptrAddrSearchGroup
                      and vgRptrAddrSearchPort to reflect the group and
                      port on which the address was heard.  If the agent
                      detects the address on more than one port, it will
                      set this object to 'multiple'."
              ::= { vgRptrAddrSearchEntry 4 }

          vgRptrAddrSearchGroup OBJECT-TYPE
              SYNTAX     Integer32 (0..2147483647)
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The group from which an error-free frame whose
                      source address is equal to the corresponding
                      instance of vgRptrAddrSearchAddress has been
                      received.  The value of this object is undefined
                      when the corresponding instance of
                      vgRptrAddrSearchState is equal to 'none' or
                      'multiple'."
              ::= { vgRptrAddrSearchEntry 5 }

          vgRptrAddrSearchPort OBJECT-TYPE
              SYNTAX     Integer32 (0..2147483647)
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "The port from which an error-free frame whose
                      source address is equal to the corresponding
                      instance of vgRptrAddrSearchAddress has been
                      received.  The value of this object is undefined
                      when the corresponding instance of
                      vgRptrAddrSearchState is equal to 'none' or
                      'multiple'."
              ::= { vgRptrAddrSearchEntry 6 }

          vgRptrAddrSearchOwner OBJECT-TYPE
              SYNTAX     OwnerString
              MAX-ACCESS read-write
              STATUS     current



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              DESCRIPTION
                      "The entity which currently has 'ownership' of
                      this vgRptrAddrSearchEntry."
              ::= { vgRptrAddrSearchEntry 7 }


          vgRptrAddrTrackGroup
              OBJECT IDENTIFIER ::= { vgRptrAddrTrack 2 }
          -- Currently unused

          vgRptrAddrTrackPort
              OBJECT IDENTIFIER ::= { vgRptrAddrTrack 3 }

          vgRptrAddrTrackTable OBJECT-TYPE
              SYNTAX     SEQUENCE OF VgRptrAddrTrackEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                  "Table of address mapping information about the
                  ports."
              ::= { vgRptrAddrTrackPort 1 }

          vgRptrAddrTrackEntry OBJECT-TYPE
              SYNTAX     VgRptrAddrTrackEntry
              MAX-ACCESS not-accessible
              STATUS     current
              DESCRIPTION
                  "An entry in the table, containing address mapping
                  information about a single port."
              INDEX      { vgRptrGroupIndex, vgRptrPortIndex }
              ::= { vgRptrAddrTrackTable 1 }

          VgRptrAddrTrackEntry ::=
              SEQUENCE {
                  vgRptrAddrLastTrainedAddress   OCTET STRING,
                  vgRptrAddrTrainedAddrChanges   Counter32,
                  vgRptrRptrDetectedDupAddress   TruthValue,
                  vgRptrMgrDetectedDupAddress    TruthValue
              }


          vgRptrAddrLastTrainedAddress OBJECT-TYPE
              SYNTAX     OCTET STRING (SIZE(0 | 6))
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is the MAC address of the last
                      station which succeeded in training on this port.



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                      A cascaded repeater may train using the null
                      address.  If no stations have succeeded in
                      training on this port since the agent began
                      monitoring the port activity, the agent shall
                      return a string of length zero."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aLastTrainedAddress."
              ::= { vgRptrAddrTrackEntry 1 }

          vgRptrAddrTrainedAddrChanges OBJECT-TYPE
              SYNTAX     Counter32
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This counter is incremented by one for each time
                      that the vgRptrAddrLastTrainedAddress object for
                      this port changes."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aTrainedAddressChanges."
              ::= { vgRptrAddrTrackEntry 2 }

          vgRptrRptrDetectedDupAddress OBJECT-TYPE
              SYNTAX     TruthValue
              MAX-ACCESS read-only
              STATUS     current
              DESCRIPTION
                      "This object is used to indicate that the
                      repeater detected an error-free training frame on
                      this port with a source MAC address which matches
                      the value of vgRptrAddrLastTrainedAddress of
                      another active port in the same repeater.  This is
                      reset to 'false' when an error-free training frame
                      is received with a source MAC address which does
                      not match vgRptrAddrLastTrainedAddress of another
                      port which is active in the same repeater.  For
                      the cascade port, this object will be 'true' if
                      the 'D' bit in the most recently received
                      error-free training response frame was set."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aLocalRptrDetectedDupAddr."
              ::= { vgRptrAddrTrackEntry 3 }

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



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              STATUS     current
              DESCRIPTION
                      "This object can be set by a management station
                      when it detects that there is a duplicate MAC
                      address.  This object is OR'd with
                      vgRptrRptrDetectedDupAddress to form the value of
                      the 'D' bit in training response frames on this
                      port.

                      The purpose of this object is to provide a means
                      for network management software to inform an end
                      station that it is using a duplicate station
                      address.  Setting this object does not affect the
                      current state of the link; the end station will
                      not be informed of the duplicate address until it
                      retrains for some reason.  Note that regardless
                      of its station address, the end station will not
                      be able to train successfully until the network
                      management software has set this object back to
                      'false'.  Although this object exists on
                      cascade ports, it does not perform any function
                      since this repeater is the initiator of training
                      on a cascade port."
              REFERENCE
                      "IEEE Standard 802.12-1995, 13.2.4.5.1,
                      aCentralMgmtDetectedDupAddr."
              ::= { vgRptrAddrTrackEntry 4 }


          vgRptrTraps         OBJECT IDENTIFIER ::= { vgRptrMIB 2 }
          vgRptrTrapPrefix    OBJECT IDENTIFIER ::= { vgRptrTraps 0 }

          vgRptrHealth NOTIFICATION-TYPE
              OBJECTS    { vgRptrInfoOperStatus }
              STATUS     current
              DESCRIPTION
                      "A vgRptrHealth trap conveys information related
                      to the operational state of a repeater.  This trap
                      is sent when the value of an instance of
                      vgRptrInfoOperStatus changes.  The vgRptrHealth
                      trap is not sent as a result of powering up a
                      repeater.

                      The vgRptrHealth trap must contain the instance of
                      the vgRptrInfoOperStatus object associated with
                      the affected repeater.

                      The agent must throttle the generation of



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                      consecutive vgRptrHealth traps so that there is at
                      least a five-second gap between traps of this
                      type.  When traps are throttled, they are dropped,
                      not queued for sending at a future time.  (Note
                      that 'generating' a trap means sending to all
                      configured recipients.)"
              REFERENCE
                      "IEEE 802.12, Layer Management, 13.2.4.2.3,
                      nRepeaterHealth."
              ::= { vgRptrTrapPrefix 1 }

          vgRptrGroupChange NOTIFICATION-TYPE
              OBJECTS    { vgRptrGroupIndex }
              STATUS     current
              DESCRIPTION
                      "This trap is sent when a change occurs in the
                      group structure of a repeater system.  This occurs
                      only when a group is physically removed from or
                      added to a repeater system.  The vgRptrGroupChange
                      trap is not sent when powering up a repeater.

                      The varBind list contains the identifier of the
                      group that was removed or added.

                      The agent must throttle the generation of
                      consecutive vgRptrGroupChange traps so that there
                      is at least a five-second gap between traps of
                      this type.  When traps are throttled, they are
                      dropped, not queued for sending at a future time.
                      (Note that 'generating' a trap means sending to
                      all configured recipients.)"
              REFERENCE
                      "IEEE 802.12, Layer Management, 13.2.4.2.3,
                      nGroupMapChange."
              ::= { vgRptrTrapPrefix 2 }

          vgRptrResetEvent NOTIFICATION-TYPE
              OBJECTS    { vgRptrInfoOperStatus }
              STATUS     current
              DESCRIPTION
                      "A vgRptrResetEvent trap conveys information
                      related to the operational state of a repeater.
                      This trap is sent on completion of a repeater
                      reset action.  A repeater reset action is defined
                      as a transition to its initial state as specified
                      in clause 12 [IEEE Std 802.12] when triggered by
                      a management command.




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                      The vgRptrResetEvent trap is not sent when the
                      agent restarts and sends an SNMP coldStart or
                      warmStart trap.

                      The vgRptrResetEvent trap must contain the
                      instance of the vgRptrInfoOperStatus object
                      associated with the affected repeater.

                      The agent must throttle the generation of
                      consecutive vgRptrResetEvent traps so that there
                      is at least a five-second gap between traps of
                      this type.  When traps are throttled, they are
                      dropped, not queued for sending at a future time.
                      (Note that 'generating' a trap means sending to
                      all configured recipients.)"
              REFERENCE
                      "IEEE 802.12, Layer Management, 13.2.4.2.3,
                      nRepeaterReset."
              ::= { vgRptrTrapPrefix 3 }

          -- conformance information

          vgRptrConformance OBJECT IDENTIFIER ::= { vgRptrMIB 3 }

          vgRptrCompliances
                       OBJECT IDENTIFIER ::= { vgRptrConformance 1 }

          vgRptrGroups OBJECT IDENTIFIER ::= { vgRptrConformance 2 }

          -- compliance statements

          vgRptrCompliance MODULE-COMPLIANCE
              STATUS     current
              DESCRIPTION
                      "The compliance statement for managed 802.12
                      repeaters."

              MODULE  -- this module
                  MANDATORY-GROUPS { vgRptrConfigGroup }

                  GROUP  vgRptrStatsGroup
                  DESCRIPTION
                         "This group is optional.  It is appropriate
                         for all agents that have the necessary
                         instrumentation."

                  GROUP  vgRptrAddrGroup
                  DESCRIPTION



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                         "This group is optional.  It is appropriate
                         for all agents that have the necessary
                         instrumentation."
              ::= { vgRptrCompliances 1 }

          -- units of conformance

          vgRptrConfigGroup OBJECT-GROUP
              OBJECTS    {
                           vgRptrInfoMACAddress,
                           vgRptrInfoCurrentFramingType,
                           vgRptrInfoDesiredFramingType,
                           vgRptrInfoFramingCapability,
                           vgRptrInfoTrainingVersion,
                           vgRptrInfoOperStatus,
                           vgRptrInfoReset,
                           vgRptrInfoLastChange,
                           vgRptrGroupDescr,
                           vgRptrGroupObjectID,
                           vgRptrGroupOperStatus,
                           vgRptrGroupLastOperStatusChange,
                           vgRptrGroupPortCapacity,
                           vgRptrGroupCablesBundled,
                           vgRptrPortType,
                           vgRptrPortAdminStatus,
                           vgRptrPortOperStatus,
                           vgRptrPortSupportedPromiscMode,
                           vgRptrPortSupportedCascadeMode,
                           vgRptrPortAllowedTrainType,
                           vgRptrPortLastTrainConfig,
                           vgRptrPortTrainingResult,
                           vgRptrPortPriorityEnable,
                           vgRptrPortRptrInfoIndex
                         }
              STATUS     current
              DESCRIPTION
                      "A collection of objects for managing the status
                      and configuration of IEEE 802.12 repeaters."
              ::= { vgRptrGroups 1 }

          vgRptrStatsGroup OBJECT-GROUP
              OBJECTS    {
                           vgRptrMonTotalFrames,
                           vgRptrMonTotalOctets,
                           vgRptrMonTotalErrors,
                           vgRptrMonHCTotalOctets,
                           vgRptrPortReadableFrames,
                           vgRptrPortReadableOctets,



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                           vgRptrPortUnreadableOctets,
                           vgRptrPortHighPriorityFrames,
                           vgRptrPortHighPriorityOctets,
                           vgRptrPortNormPriorityFrames,
                           vgRptrPortNormPriorityOctets,
                           vgRptrPortBroadcastFrames,
                           vgRptrPortMulticastFrames,
                           vgRptrPortNullAddressedFrames,
                           vgRptrPortIPMFrames,
                           vgRptrPortOversizeFrames,
                           vgRptrPortDataErrorFrames,
                           vgRptrPortPriorityPromotions,
                           vgRptrPortTransitionToTrainings,
                           vgRptrPortHCReadableOctets,
                           vgRptrPortHCUnreadableOctets,
                           vgRptrPortHCHighPriorityOctets,
                           vgRptrPortHCNormPriorityOctets,
                           vgRptrPortLastChange
                         }
              STATUS     current
              DESCRIPTION
                      "A collection of objects for providing statistics
                      for IEEE 802.12 repeaters."
              ::= { vgRptrGroups 2 }

          vgRptrAddrGroup OBJECT-GROUP
              OBJECTS    {
                           vgRptrAddrSearchLock,
                           vgRptrAddrSearchStatus,
                           vgRptrAddrSearchAddress,
                           vgRptrAddrSearchState,
                           vgRptrAddrSearchGroup,
                           vgRptrAddrSearchPort,
                           vgRptrAddrSearchOwner,
                           vgRptrAddrLastTrainedAddress,
                           vgRptrAddrTrainedAddrChanges,
                           vgRptrRptrDetectedDupAddress,
                           vgRptrMgrDetectedDupAddress
                         }
              STATUS     current
              DESCRIPTION
                      "A collection of objects for tracking addresses
                      on IEEE 802.12 repeaters."
              ::= { vgRptrGroups 3 }

          END





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5.  Acknowledgements

   This document was produced by the IETF 100VG-AnyLAN Working Group.
   It is based on the work of IEEE 802.12.


6.  References

   [1] Information processing systems - Open Systems Interconnection -
       Specification of Abstract Syntax Notation One (ASN.1),
       International Organization for Standardization.  International
       Standard 8824 (December, 1987).

   [2] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Structure
       of Management Information for version 2 of the Simple Network
       Management Protocol (SNMPv2)", RFC 1442, SNMP Research, Inc.,
       Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon
       University, April 1993.

   [3] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser, "Textual
       Conventions for version 2 of the Simple Network Management
       Protocol (SNMPv2)", RFC 1443, SNMP Research, Inc., Hughes LAN
       Systems, Dover Beach Consulting, Inc., Carnegie Mellon
       University, April 1993.

   [4] Case, J., McCloghrie, K., Rose, M., and S. Waldbusser,
       "Conformance Statements for version 2 of the Simple Network
       Management Protocol (SNMPv2)", RFC 1444, SNMP Research, Inc.,
       Hughes LAN Systems, Dover Beach Consulting, Inc., Carnegie Mellon
       University, April 1993.

   [5] McCloghrie, K., and M. Rose, "Management Information Base for
       Network Management of TCP/IP-based internets - MIB-II", STD 17,
       RFC 1213, Hughes LAN Systems, Performance Systems International,
       March 1991.

   [6] IEEE, "Demand Priority Access Method, Physical Layer and Repeater
       Specifications for 100 Mb/s Operation", IEEE Standard
       802.12-1995"


7.  Security Considerations

   Security issues are not discussed in this memo.


8.  Author's Address




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   John Flick
   Hewlett Packard Company
   8000 Foothills Blvd. M/S 5556
   Roseville, CA 95747-5556

   Phone: +1 916 785 4018
   Email: johnf@hprnd.rose.hp.com












































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Table of Contents

   1.  Abstract ...................................................    2
   2.  Object Definitions .........................................    2
   3.  Overview ...................................................    3
   3.1.  MAC Addresses ............................................    3
   3.2.  IEEE 802.12 Training Frames ..............................    4
   3.3.  Structure of the MIB .....................................    7
   3.3.1.  The Basic Group Definitions ............................    7
   3.3.2.  The Monitor Group Definitions ..........................    7
   3.3.3.  The Address Tracking Group Definitions .................    7
   3.4.  Relationship to other MIBs ...............................    7
   3.4.1.  Relationship to the 'system' group .....................    7
   3.4.2.  Relationship to the 'interfaces' group .................    7
   3.5.  Mapping of IEEE 802.12 Managed Objects ...................    8
   4.  Definitions ................................................   10
   5.  Acknowledgements ...........................................   51
   6.  References .................................................   51
   7.  Security Considerations ....................................   51
   8.  Author's Address ...........................................   51































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