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3.2. OSPF Area Table Connected: An Internet Encyclopedia
3.2. OSPF Area Table

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3.2. OSPF Area Table

3.2. OSPF Area Table

--      The OSPF Area Data Structure contains information
--      regarding the various areas. The interfaces and
--      virtual links are configured as part of these areas.
--      Area 0.0.0.0, by definition, is the Backbone Area


    ospfAreaTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfAreaEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "Information describing the configured  parame-
           ters  and cumulative statistics of the router's
           attached areas."
       REFERENCE
          "OSPF Version 2, Section 6  The Area Data Struc-
          ture"
      ::= { ospf 2 }


    ospfAreaEntry OBJECT-TYPE
        SYNTAX   OspfAreaEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "Information describing the configured  parame-
           ters  and  cumulative  statistics of one of the
           router's attached areas."
       INDEX { ospfAreaId }
       ::= { ospfAreaTable 1 }

OspfAreaEntry ::=
    SEQUENCE {
        ospfAreaId
            AreaID,
        ospfAuthType
            Integer32,
        ospfImportAsExtern
            INTEGER,
        ospfSpfRuns
            Counter32,
        ospfAreaBdrRtrCount
            Gauge32,
        ospfAsBdrRtrCount
            Gauge32,
        ospfAreaLsaCount
            Gauge32,
        ospfAreaLsaCksumSum
            Integer32,
        ospfAreaSummary
            INTEGER,
        ospfAreaStatus
            RowStatus
              }

    ospfAreaId OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "A 32-bit integer uniquely identifying an area.
           Area ID 0.0.0.0 is used for the OSPF backbone."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfAreaEntry 1 }


    ospfAuthType OBJECT-TYPE
        SYNTAX   Integer32
                    -- none (0),
                    -- simplePassword (1)
                    -- md5 (2)
                    -- reserved for specification by IANA (> 2)
        MAX-ACCESS   read-create
        STATUS   obsolete
        DESCRIPTION
           "The authentication type specified for an area.
           Additional authentication types may be assigned
           locally on a per Area basis."
       REFERENCE
          "OSPF Version 2, Appendix E Authentication"
      DEFVAL { 0 }        -- no authentication, by default
      ::= { ospfAreaEntry 2 }

    ospfImportAsExtern OBJECT-TYPE
        SYNTAX   INTEGER    {
                    importExternal (1),
                    importNoExternal (2),
                    importNssa (3)
                  }
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The area's support for importing  AS  external
           link- state advertisements."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      DEFVAL { importExternal }
      ::= { ospfAreaEntry 3 }


    ospfSpfRuns OBJECT-TYPE
        SYNTAX   Counter32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The number of times that the intra-area  route
           table  has  been  calculated  using this area's
           link-state database.  This  is  typically  done
           using Dijkstra's algorithm."
       ::= { ospfAreaEntry 4 }


    ospfAreaBdrRtrCount OBJECT-TYPE
        SYNTAX   Gauge32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The total number of area border routers reach-
           able within this area.  This is initially zero,
           and is calculated in each SPF Pass."
       ::= { ospfAreaEntry 5 }

    ospfAsBdrRtrCount OBJECT-TYPE
        SYNTAX   Gauge32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The total number of Autonomous  System  border
           routers  reachable  within  this area.  This is
           initially zero, and is calculated in  each  SPF
           Pass."
       ::= { ospfAreaEntry 6 }


    ospfAreaLsaCount OBJECT-TYPE
        SYNTAX   Gauge32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The total number of link-state  advertisements
           in  this  area's link-state database, excluding
           AS External LSA's."
       ::= { ospfAreaEntry 7 }


    ospfAreaLsaCksumSum OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The 32-bit unsigned sum of the link-state  ad-
           vertisements'  LS  checksums  contained in this
           area's link-state database.  This sum  excludes
           external (LS type 5) link-state advertisements.
           The sum can be used to determine if  there  has
           been  a  change  in a router's link state data-
           base, and to compare the link-state database of
           two routers."
       DEFVAL   { 0 }
       ::= { ospfAreaEntry 8 }

    ospfAreaSummary OBJECT-TYPE
        SYNTAX   INTEGER    {
                    noAreaSummary (1),
                    sendAreaSummary (2)
                  }
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The variable ospfAreaSummary controls the  im-
           port  of  summary LSAs into stub areas.  It has
           no effect on other areas.

           If it is noAreaSummary, the router will neither
           originate  nor  propagate summary LSAs into the
           stub area.  It will rely entirely  on  its  de-
           fault route.

           If it is sendAreaSummary, the router will  both
           summarize and propagate summary LSAs."
       DEFVAL   { noAreaSummary }
       ::= { ospfAreaEntry 9 }


    ospfAreaStatus 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."
       ::= { ospfAreaEntry 10 }



Next: 3.3. OSPF Area Default Metrics

Connected: An Internet Encyclopedia
3.2. OSPF Area Table

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