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3.1. OSPF General Variables Connected: An Internet Encyclopedia
3.1. OSPF General Variables

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3.1. OSPF General Variables

3.1. OSPF General Variables

--  OSPF General Variables

--      These parameters apply globally to the Router's
--      OSPF Process.

ospfGeneralGroup OBJECT IDENTIFIER ::= { ospf 1 }


    ospfRouterId OBJECT-TYPE
        SYNTAX   RouterID
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "A  32-bit  integer  uniquely  identifying  the
           router in the Autonomous System.

           By  convention,  to  ensure  uniqueness,   this
           should  default  to  the  value  of  one of the
           router's IP interface addresses."
       REFERENCE
          "OSPF Version 2, C.1 Global parameters"
      ::= { ospfGeneralGroup 1 }


    ospfAdminStat OBJECT-TYPE
        SYNTAX   Status
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "The  administrative  status  of  OSPF  in  the
           router.   The  value 'enabled' denotes that the
           OSPF Process is active on at least  one  inter-
           face;  'disabled'  disables  it  on  all inter-
           faces."
       ::= { ospfGeneralGroup 2 }

    ospfVersionNumber OBJECT-TYPE
        SYNTAX   INTEGER    { version2 (2) }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The current version number of the OSPF  proto-
           col is 2."
       REFERENCE
          "OSPF Version 2, Title"
      ::= { ospfGeneralGroup 3 }


    ospfAreaBdrRtrStatus OBJECT-TYPE
        SYNTAX   TruthValue
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "A flag to note whether this router is an  area
           border router."
       REFERENCE
          "OSPF Version 2, Section 3 Splitting the AS into
          Areas"
      ::= { ospfGeneralGroup 4 }


    ospfASBdrRtrStatus OBJECT-TYPE
        SYNTAX   TruthValue
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "A flag to note whether this router is  config-
           ured as an Autonomous System border router."
       REFERENCE
          "OSPF Version 2, Section 3.3  Classification  of
          routers"
      ::= { ospfGeneralGroup 5 }

    ospfExternLsaCount OBJECT-TYPE
        SYNTAX   Gauge32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The number of external (LS type 5)  link-state
           advertisements in the link-state database."
       REFERENCE
          "OSPF Version 2, Appendix A.4.5 AS external link
          advertisements"
      ::= { ospfGeneralGroup 6 }


    ospfExternLsaCksumSum OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The 32-bit unsigned sum of the LS checksums of
           the  external  link-state  advertisements  con-
           tained in the link-state  database.   This  sum
           can  be  used  to determine if there has been a
           change in a router's link state  database,  and
           to  compare  the  link-state  database  of  two
           routers."
       ::= { ospfGeneralGroup 7 }


    ospfTOSSupport OBJECT-TYPE
        SYNTAX   TruthValue
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "The router's support for type-of-service rout-
           ing."
       REFERENCE
          "OSPF Version 2,  Appendix  F.1.2  Optional  TOS
          support"
      ::= { ospfGeneralGroup 8 }

    ospfOriginateNewLsas OBJECT-TYPE
        SYNTAX   Counter32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The number of  new  link-state  advertisements
           that  have been originated.  This number is in-
           cremented each time the router originates a new
           LSA."
       ::= { ospfGeneralGroup 9 }


    ospfRxNewLsas OBJECT-TYPE
        SYNTAX   Counter32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The number of  link-state  advertisements  re-
           ceived  determined  to  be  new instantiations.
           This number does not include  newer  instantia-
           tions  of self-originated link-state advertise-
           ments."
       ::= { ospfGeneralGroup 10 }

    ospfExtLsdbLimit OBJECT-TYPE
        SYNTAX   Integer32 (-1..'7FFFFFFF'h)
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "The  maximum   number   of   non-default   AS-
           external-LSAs entries that can be stored in the
           link-state database.  If the value is -1,  then
           there is no limit.

           When the number of non-default AS-external-LSAs
           in   a  router's  link-state  database  reaches
           ospfExtLsdbLimit, the router  enters  Overflow-
           State.   The   router  never  holds  more  than
           ospfExtLsdbLimit  non-default  AS-external-LSAs
           in  its  database. OspfExtLsdbLimit MUST be set
           identically in all routers attached to the OSPF
           backbone  and/or  any regular OSPF area. (i.e.,
           OSPF stub areas and NSSAs are excluded)."
       DEFVAL { -1 }
       ::= { ospfGeneralGroup 11 }

    ospfMulticastExtensions OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "A Bit Mask indicating whether  the  router  is
           forwarding  IP  multicast  (Class  D) datagrams
           based on the algorithms defined in  the  Multi-
           cast Extensions to OSPF.

           Bit 0, if set, indicates that  the  router  can
           forward  IP multicast datagrams in the router's
           directly attached areas (called intra-area mul-
           ticast routing).

           Bit 1, if set, indicates that  the  router  can
           forward  IP  multicast  datagrams  between OSPF
           areas (called inter-area multicast routing).

           Bit 2, if set, indicates that  the  router  can
           forward  IP  multicast  datagrams between Auto-
           nomous Systems (called inter-AS multicast rout-
           ing).

           Only certain combinations of bit  settings  are
           allowed,  namely: 0 (no multicast forwarding is
           enabled), 1 (intra-area multicasting  only),  3
           (intra-area  and  inter-area  multicasting),  5
           (intra-area and inter-AS  multicasting)  and  7
           (multicasting  everywhere). By default, no mul-
           ticast forwarding is enabled."
       DEFVAL { 0 }
       ::= { ospfGeneralGroup 12 }

    ospfExitOverflowInterval OBJECT-TYPE
        SYNTAX   PositiveInteger
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "The number of  seconds  that,  after  entering
           OverflowState,  a  router will attempt to leave
           OverflowState. This allows the router to  again
           originate  non-default  AS-external-LSAs.  When
           set to 0, the router will not  leave  Overflow-
           State until restarted."
       DEFVAL { 0 }
       ::= { ospfGeneralGroup 13 }


    ospfDemandExtensions OBJECT-TYPE
        SYNTAX   TruthValue
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "The router's support for demand routing."
       REFERENCE
          "OSPF Version 2, Appendix on Demand Routing"
      ::= { ospfGeneralGroup 14 }



Next: 3.2. OSPF Area Table

Connected: An Internet Encyclopedia
3.1. OSPF General Variables

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