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View File Name : IF-INVERTED-STACK-MIB.txt

IF-INVERTED-STACK-MIB DEFINITIONS ::= BEGIN

IMPORTS
  MODULE-IDENTITY, OBJECT-TYPE, mib-2      FROM SNMPv2-SMI
  RowStatus                                FROM SNMPv2-TC
  MODULE-COMPLIANCE, OBJECT-GROUP          FROM SNMPv2-CONF
  ifStackGroup2,
  ifStackHigherLayer, ifStackLowerLayer    FROM IF-MIB;

ifInvertedStackMIB MODULE-IDENTITY
  LAST-UPDATED "200006140000Z"
  ORGANIZATION "IETF Interfaces MIB Working Group"
  CONTACT-INFO
          "   Keith McCloghrie
              Cisco Systems, Inc.
              170 West Tasman Drive
              San Jose, CA  95134-1706
              US

              408-526-5260
              kzm@cisco.com"
  DESCRIPTION
          "The MIB module which provides the Inverted Stack Table for
          interface sub-layers."
  REVISION      "200006140000Z"
  DESCRIPTION
          "Initial revision, published as RFC 2864"
  ::= { mib-2 77 }

ifInvMIBObjects OBJECT IDENTIFIER ::= { ifInvertedStackMIB 1 }

--
--           The Inverted Interface Stack Group
--

ifInvStackTable  OBJECT-TYPE
   SYNTAX        SEQUENCE OF IfInvStackEntry
   MAX-ACCESS    not-accessible
   STATUS        current
   DESCRIPTION
          "A table containing information on the relationships between

          the multiple sub-layers of network interfaces.  In
          particular, it contains information on which sub-layers run
          'underneath' which other sub-layers, where each sub-layer
          corresponds to a conceptual row in the ifTable.  For
          example, when the sub-layer with ifIndex value x runs
          underneath the sub-layer with ifIndex value y, then this
          table contains:

            ifInvStackStatus.x.y=active

          For each ifIndex value, z, which identifies an active
          interface, there are always at least two instantiated rows
          in this table associated with z.  For one of these rows, z
          is the value of ifStackHigherLayer; for the other, z is the
          value of ifStackLowerLayer.  (If z is not involved in
          multiplexing, then these are the only two rows associated
          with z.)

          For example, two rows exist even for an interface which has
          no others stacked on top or below it:

            ifInvStackStatus.z.0=active
            ifInvStackStatus.0.z=active

          This table contains exactly the same number of rows as the
          ifStackTable, but the rows appear in a different order."
   REFERENCE
          "ifStackTable of RFC 2863"
   ::= { ifInvMIBObjects 1 }

ifInvStackEntry  OBJECT-TYPE
   SYNTAX        IfInvStackEntry
   MAX-ACCESS    not-accessible
   STATUS        current
   DESCRIPTION
          "Information on a particular relationship between two sub-
          layers, specifying that one sub-layer runs underneath the
          other sub-layer.  Each sub-layer corresponds to a conceptual
          row in the ifTable."
   INDEX { ifStackLowerLayer, ifStackHigherLayer }
   ::= { ifInvStackTable 1 }

IfInvStackEntry ::=
  SEQUENCE {
      ifInvStackStatus       RowStatus
   }

ifInvStackStatus  OBJECT-TYPE
  SYNTAX         RowStatus
  MAX-ACCESS     read-only
  STATUS         current
  DESCRIPTION
          "The status of the relationship between two sub-layers.

          An instance of this object exists for each instance of the
          ifStackStatus object, and vice versa.  For example, if the
          variable ifStackStatus.H.L exists, then the variable
          ifInvStackStatus.L.H must also exist, and vice versa.  In
          addition, the two variables always have the same value.

          However, unlike ifStackStatus, the ifInvStackStatus object
          is NOT write-able.  A network management application wishing
          to change a relationship between sub-layers H and L cannot
          do so by modifying the value of ifInvStackStatus.L.H, but
          must instead modify the value of ifStackStatus.H.L.  After
          the ifStackTable is modified, the change will be reflected
          in this table."
  ::= { ifInvStackEntry 1 }

-- conformance information

ifInvConformance OBJECT IDENTIFIER ::= { ifInvMIBObjects 2 }

ifInvGroups      OBJECT IDENTIFIER ::= { ifInvConformance 1 }
ifInvCompliances OBJECT IDENTIFIER ::= { ifInvConformance 2 }

-- compliance statements

ifInvCompliance MODULE-COMPLIANCE
  STATUS  current
  DESCRIPTION
          "The compliance statement for SNMP entities which provide
          inverted information on the layering of network interfaces."

  MODULE  -- this module
      MANDATORY-GROUPS { ifInvStackGroup }

      OBJECT       ifInvStackStatus
      SYNTAX       INTEGER { active(1) }
      DESCRIPTION
          "Support is only required for 'active'."

  MODULE  IF-MIB
      MANDATORY-GROUPS { ifStackGroup2 }
  ::= { ifInvCompliances 1 }

-- units of conformance

ifInvStackGroup    OBJECT-GROUP
  OBJECTS { ifInvStackStatus }
  STATUS  current
  DESCRIPTION
          "A collection of objects providing inverted information on
          the layering of MIB-II interfaces."
  ::= { ifInvGroups 1 }

END