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3.9. OSPF Virtual Interface Table Connected: An Internet Encyclopedia
3.9. OSPF Virtual Interface Table

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3.9. OSPF Virtual Interface Table

3.9. OSPF Virtual Interface Table

--  OSPF Virtual Interface Table

--      The Virtual Interface Table describes the virtual
--      links that the OSPF Process is configured to
--      carry on.

    ospfVirtIfTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfVirtIfEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "Information about this router's virtual inter-
           faces."
       REFERENCE
          "OSPF Version  2,  Appendix  C.4   Virtual  link
          parameters"
      ::= { ospf 9 }


    ospfVirtIfEntry OBJECT-TYPE
        SYNTAX   OspfVirtIfEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "Information about a single Virtual Interface."
       INDEX { ospfVirtIfAreaId, ospfVirtIfNeighbor }
       ::= { ospfVirtIfTable 1 }

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

    ospfVirtIfAreaId OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The  Transit  Area  that  the   Virtual   Link
           traverses.  By definition, this is not 0.0.0.0"
       ::= { ospfVirtIfEntry 1 }


    ospfVirtIfNeighbor OBJECT-TYPE
        SYNTAX   RouterID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The Router ID of the Virtual Neighbor."
       ::= { ospfVirtIfEntry 2 }


    ospfVirtIfTransitDelay OBJECT-TYPE
        SYNTAX   UpToMaxAge
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The estimated number of seconds  it  takes  to
           transmit  a link- state update packet over this
           interface."
       DEFVAL { 1 }
       ::= { ospfVirtIfEntry 3 }


    ospfVirtIfRetransInterval OBJECT-TYPE
        SYNTAX   UpToMaxAge
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The number of seconds between  link-state  ad-
           vertisement  retransmissions,  for  adjacencies
           belonging to this  interface.   This  value  is
           also used when retransmitting database descrip-
           tion  and  link-state  request  packets.   This
           value  should  be well over the expected round-
           trip time."
       DEFVAL { 5 }
       ::= { ospfVirtIfEntry 4 }


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


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


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


    ospfVirtIfEvents OBJECT-TYPE
        SYNTAX   Counter32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The number of state changes or error events on
           this Virtual Link"
       ::= { ospfVirtIfEntry 8 }


    ospfVirtIfAuthKey OBJECT-TYPE
        SYNTAX   OCTET STRING (SIZE(0..256))
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "If Authentication Type is simplePassword,  the
           device  will left adjust and zero fill to 8 oc-
           tets.

           Note that unauthenticated  interfaces  need  no
           authentication key, and simple password authen-
           tication cannot use a key of more  than  8  oc-
           tets.  Larger keys are useful only with authen-
           tication mechanisms not specified in this docu-
           ment.

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


    ospfVirtIfStatus OBJECT-TYPE
        SYNTAX   RowStatus
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "This variable displays the status of  the  en-
           try.  Setting it to 'invalid' has the effect of
           rendering it inoperative.  The internal  effect
           (row removal) is implementation dependent."
       ::= { ospfVirtIfEntry 10 }


    ospfVirtIfAuthType OBJECT-TYPE
        SYNTAX   INTEGER (0..255)
                    -- none (0),
                    -- simplePassword (1)
                    -- md5 (2)
                    -- reserved for specification by IANA (> 2)
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The authentication type specified for a virtu-
           al  interface.  Additional authentication types
           may be assigned locally."
       REFERENCE
          "OSPF Version 2, Appendix E Authentication"
      DEFVAL { 0 }        -- no authentication, by default
      ::= { ospfVirtIfEntry 11 }



Next: 3.10. OSPF Neighbor Table

Connected: An Internet Encyclopedia
3.9. OSPF Virtual Interface Table

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