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Versions: 00 04 05 RFC 1850

Internet Draft             OSPF MIB               January 1995


          OSPF Version 2 Management Information Base
                  draft-ietf-ospf-mib-05.txt

                 Mon Jan  9 14:20:53 PST 1995


                          Fred Baker

               Advanced Computer Communications
                       315 Bollay Drive
               Santa Barbara, California 93117

                        fbaker@acc.com


                          Rob Coltun

                 RainbowBridge Communications
                        (301) 340-9416

                  rcoltun@rainbow-bridge.com






1.  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. Internet Drafts may be updated, replaced, or obsoleted
by other documents at any time.  It is not appropriate to use
Internet Drafts as reference material or to cite them other
than as a "working draft" or "work in progress."

Please check the I-D abstract listing contained in each
Internet Draft directory to learn the current status of this
or any other Internet Draft.






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2.  Abstract

This memo defines a 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 the Open Shortest Path First Routing Protocol.

This memo does not, in its draft form, specify a standard for
the Internet community.









































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3.  The SNMPv2 Network Management Framework

The SNMPv2 Network Management Framework consists of four major
components.  They are:

o    RFC 1441 which defines the SMI, the mechanisms used for
     describing and naming objects for the purpose of
     management.

o    RFC 1213 defines MIB-II, the core set of managed objects
     for the Internet suite of protocols.

o    RFC 1445 which defines the administrative and other
     architectural aspects of the framework.

o    RFC 1448 which defines the protocol used for network
     access to managed objects.

The Framework permits new objects to be defined for the
purpose of experimentation and evaluation.


3.1.  Object Definitions

Managed objects are accessed via a virtual information store,
termed the Management Information Base or MIB.  Objects in the
MIB are defined using the subset of Abstract Syntax Notation
One (ASN.1) defined in the SMI.  In particular, each object
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.


4.  Overview

4.1.  Changes from RFC 1253

The changes from RFC 1253 are the following:

(1)  The textual convention PositiveInteger was changed from
     1..'FFFFFFFF'h to 1..'7FFFFFFF'h at the request of
     Marshall Rose.





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(2)  The textual convention TOSType was changed to reflect the
     TOS values defined in the Router Requirements Draft, and
     in accordance with the IP Forwarding Table MIB's values.

(3)  The names of some objects were changed, conforming to the
     convention that an acronym (for example, LSA) is a single
     word ("Lsa") in most SNMP names.

(4)  textual changes were made to make the MIB readable by
     Dave Perkins' SMIC MIB Compiler in addition to Mosy.
     This involved changing the case of some characters in
     certain names and removing the DEFVAL clauses for
     Counters.  (This would appear to violate RFC 1212, which
     explicitly states that DEFVALs are for the purpose of
     initializing read-only objects???)

(5)  The variables ospfAreaStatus and ospfIfStatus were added,
     having been overlooked in the original MIB.

(6)  The range of the variable ospfLsdbType was extended to
     include multicastLink (Group-membership LSA) and
     nssaExternalLink (NSSA LSA).

(7)  The variable ospfIfMetricMetric was renamed
     ospfIfMetricValue, and the following text was removed
     from its description:

     "The value FFFF is distinguished to mean 'no route via
     this TOS'."

(8)  The variable ospfNbmaNbrPermanence was added, with the
     values 'dynamic' and 'permanent'; by this means,
     dynamically learned and configured neighbors can be
     distinguished.

(9)  The DESCRIPTION of the variable ospfNbrIpAddr was changed
     from

     "The IP address of this neighbor."

     to

     "The IP address this neighbor is using in its IP Source
     Address.  Note that, on addressless links, this will not
     be 0.0.0.0, but the address of another of the neighbor's





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     interfaces."

     This is by way of clarification and does not change the
     specification.

(10) The OSPF External Link State Database was added.  The
     OSPF Link State Database used to display all LSAs stored;
     in this MIB, it displays all but the AS External LSAs.
     This is because there are usually a large number of
     External LSAs, and they are relicated in all non-Stub
     Areas.

(11) The variable ospfAreaSummary was added to control the
     import of summary LSAs into stub areas.  If it is
     noAreaSummary (default) the router will neither originate
     nor propagate summary LSAs into the stub area.  It will
     rely entirely on its default route.  If it is
     sendAreaSummary, the router will both summarize and
     propagate summary LSAs.

(12) The general variables ospfExtLsdbLimit and
     ExitOverflowInterval were introduced to help handle LSDB
     overflow.

(13) The use of the IP Forwarding Table is defined.

(14) The ospfAreaRangeTable was obsoleted and replaced with
     the ospfAreaAggregateTable to accommodate two additional
     indexes.  The ospfAreaAggregateEntry keys now include a
     LsdbType (which can be used to differentiate between the
     traditional type-3 Aggregates and NSSA Aggregates) and an
     ospfAreaAggregateMask (which will more clearly express
     the range).

(15) The variable ospfAreaAggregateEffect was added.  This
     permits the network manager to hide a subnet within an
     area.

(16) Normally, the border router of a stub area advertises a
     default route as an OSPF network summary.  An NSSA border
     router will generate a type-7 LSA indicating a default
     route, and import it into the NSSA.  ospfStubMetricType
     (ospf internal, type 1 external, or type 2 external)
     indicates the type of the default metric advertised.






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(17) ospfMulticastExtensions is added to the OSPF General
     Group.  This indicates the router's ability to forward IP
     multicast (Class D) datagrams.

(18) ospfIfMulticastForwarding is added to the Interface
     Group.  It indicates whether, and if so, how, multicasts
     should be forwarded on the interface.

(19) The MIB is converted to SNMP Version 2.  Beyond simple
     text changes and the addition of the MODULE-IDENTITY and
     MODULE-COMPLIANCE macros, this involved trading the
     TruthValue Textual Convention for SNMP Version 2's, which
     has the same values, and trading the Validation Textual
     Convention for SNMP Version 2's RowStatus.

(20) ospfAuthType (area authentication type) was changed to an
     interface authentication type to match the key.  It also
     has an additional value, to indicate the use of MD5 for
     authentication.

(21) ospfIfIntfType has a new value, pointToMultipoint.

(22) ospfIfDemand (read/write) is added, to permit control of
     Demand OSPF features.

(23) ospfNbrHelloSuppressed is added, (read only). This
     indicates whether Hellos are being suppressed to the
     neighbor.






















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4.2.  Textual Conventions

Several new data types are introduced as a textual convention
in this MIB document.  These textual conventions enhance the
readability of the specification and can ease comparison with
other specifications if appropriate.  It should be noted that
the introduction of the these textual conventions has no
effect on either the syntax nor the semantics of any managed
objects.  The use of these is merely an artifact of the
explanatory method used.  Objects defined in terms of one of
these methods are always encoded by means of the rules that
define the primitive type.  Hence, no changes to the SMI or
the SNMP are necessary to accommodate these textual
conventions which are adopted merely for the convenience of
readers and writers in pursuit of the elusive goal of clear,
concise, and unambiguous MIB documents.

The new data types are AreaID, RouterID, TOSType, Metric,
BigMetric, Status, PositiveInteger, HelloRange, UpToMaxAge,
InterfaceIndex, and DesignatedRouterPriority.

4.3.  Structure of MIB

The MIB is composed of the following sections:
     General Variables
     Area Data Structure
     Area Stub Metric Table
     Link State Database
     Address Range Table
     Host Table
     Interface Table
     Interface Metric Table
     Virtual Interface Table
     Neighbor Table
     Virtual Neighbor Table
     External Link State Database
     Aggregate Range Table

There exists a separate MIB for notifications ("traps"), which
is entirely optional.

4.3.1.  General Variables

The General Variables are about what they sound like;
variables which are global to the OSPF Process.





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4.3.2.  Area Data Structure and Area Stub Metric Table

The Area Data Structure describes the OSPF Areas that the
router participates in.  The Area Stub Metric Table describes
the metrics advertised into a stub area by the default
router(s).

4.3.3.  Link State Database and External Link State Database

The Link State Database is provided primarily to provide
detailed information for network debugging.

4.3.4.  Address Table and Host Tables

The Address Range Table and Host Table are provided to view
configured Network Summary and Host Route information.

4.3.5.  Interface and Interface Metric Tables

The Interface Table and the Interface Metric Table together
describe the various IP interfaces to OSPF.  The metrics are
placed in separate tables in order to simplify dealing with
multiple types of service, and to provide flexibility in the
event that the IP TOS definition is changed in the future.  A
Default Value specification is supplied for the TOS 0
(default) metric.

4.3.6.  Virtual Interface Table

Likewise, the Virtual Interface Table describe virtual links
to the OSPF Process.

4.3.7.  Neighbor and Virtual Neighbor Tables

The Neighbor Table and the Virtual Neighbor Table describe the
neighbors to the OSPF Process.

4.4.  Conceptual Row Creation

For the benefit of row-creation in "conceptual" (see [9])
tables, DEFVAL (Default Value) clauses are included in the
definitions in section 5, suggesting values which an agent
should use for instances of variables which need to be created
due to a Set-Request, but which are not specified in the Set-
Request.  DEFVAL clauses have not been specified for some





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objects which are read-only, implying that they are zeroed
upon row creation.  These objects are of the SYNTAX Counter32
or Gauge32.

For those objects not having a DEFVAL clause, both management
stations and agents should heed the Robustness Principle of
the Internet (see RFC-791):

     "be liberal in what you accept, conservative in what you
     send"

That is, management stations should include as many of these
columnar objects as possible (e.g., all read-write objects) in
a Set-Request when creating a conceptual row; agents should
accept a Set-Request with as few of these as they need (e.g.,
the minimum contents of a row creating SET consists of those
objects for which, as they cannot be intuited, no default is
specified.).

There are numerous read-write objects in this MIB, as it is
designed for SNMP management of the protocol, not just SNMP
monitoring of its state.  However, in the absence of a
standard SNMP Security architecture, it is acceptable for
implementations to implement these as read-only with an
alternative interface for their modification.

4.5.  Default Configuration

OSPF is a powerful routing protocol, equipped with features to
handle virtually any configuration requirement that might
reasonably be found within an Autonomous System.  With this
power comes a fair degree of complexity, which the sheer
number of objects in the MIB will attest to.  Care has
therefore been taken, in constructing this MIB, to define
default values for virtually every object, to minimize the
amount of parameterization required in the typical case.  That
default configuration is as follows:

Given the following assumptions:

-    IP has already been configured

-    The ifTable has already been configured







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-    ifSpeed is estimated by the interface drivers

-    The OSPF Process automatically discovers all IP
     Interfaces and creates corresponding OSPF Interfaces

-    The TOS 0 metrics are autonomously derived from ifSpeed

-    The OSPF Process automatically creates the Areas required
     for the Interfaces

The simplest configuration of an OSPF process requires that:

-    The OSPF Process be Enabled.

This can be accomplished with a single SET:
                  ospfAdminStat := enabled.

The configured system will have the following attributes:

-    The RouterID will be one of the IP addresses of the
     device

-    The device will be neither an Area Border Router nor an
     Autonomous System Border Router.

-    Every IP Interface, with or without an address, will be
     an OSPF Interface.

-    The AreaID of each interface will be 0.0.0.0, the
     Backbone.

-    Authentication will be disabled

-    All Broadcast and Point to Point interfaces will be
     operational.  NBMA Interfaces require the configuration
     of at least one neighbor.

-    Timers on all direct interfaces will be:
          Hello Interval:        10 seconds
          Dead Timeout:          40 Seconds
          Retransmission:         5 Seconds
          Transit Delay:          1 Second
          Poll Interval:        120 Seconds







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-    no direct links to hosts will be configured.

-    no addresses will be summarized

-    Metrics, being a measure of bit duration, are unambiguous
     and intelligent.

-    No Virtual Links will be configured.










































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5.  Definitions

OSPF-MIB DEFINITIONS ::= BEGIN

    IMPORTS
            MODULE-IDENTITY, OBJECT-TYPE, Counter32, Gauge32,
            Integer32, IpAddress
                FROM SNMPv2-SMI
            TEXTUAL-CONVENTION, TruthValue, RowStatus
                FROM SNMPv2-TC
            MODULE-COMPLIANCE, OBJECT-GROUP          FROM SNMPv2-CONF
            mib-2                                    FROM RFC1213-MIB;

--  This MIB module uses the extended OBJECT-TYPE macro as
--  defined in [9].

ospf MODULE-IDENTITY
        LAST-UPDATED "9501091420Z" -- Mon Jan  9 14:20:53 PST 1995
        ORGANIZATION "IETF OSPF Working Group"
        CONTACT-INFO
       "       Fred Baker
       Postal: Advanced Computer Communications
               315 Bollay Drive
               Santa Barbara, California 93117
       Tel:    +1 085 685 4455
       E-Mail: fbaker@acc.com

               Rob Coltun
       Postal: RainbowBridge Communications
       Tel:    (301) 340-9416
       E-Mail: rcoltun@rainbow-bridge.com"
    DESCRIPTION
       "The MIB module to describe the OSPF Version 2
       Protocol"
    ::= { mib-2 14 }

--  The Area ID, in OSPF, has the same format as an IP Address,
--  but has the function of defining a summarization point for
--  Link State Advertisements

AreaID ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "An OSPF Area Identifier."
    SYNTAX      IpAddress





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--  The Router ID, in OSPF, has the same format as an IP Address,
--  but identifies the router independent of its IP Address.

RouterID ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "A OSPF Router Identifier."
    SYNTAX      IpAddress


--  The OSPF Metric is defined as an unsigned value in the range

Metric ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "The OSPF Internal Metric."
    SYNTAX      Integer32 (0..'FFFF'h)

BigMetric ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "The OSPF External Metric."
    SYNTAX      Integer32 (0..'FFFFFF'h)

--  Status Values

Status ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "The status of an interface: 'enabled' indicates that
       it is willing to communicate with other OSPF Routers,
       while 'disabled' indicates that it is not."
    SYNTAX      INTEGER { enabled (1), disabled (2) }

--  Time Durations measured in seconds

PositiveInteger ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "A positive integer. Values in excess are precluded as
       unnecessary and prone to interoperability issues."
    SYNTAX      Integer32 (0..'7FFFFFFF'h)

HelloRange ::= TEXTUAL-CONVENTION
    STATUS      current





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    DESCRIPTION
       "The range of intervals on which hello messages are
       exchanged."
    SYNTAX      Integer32 (1..'FFFF'h)

UpToMaxAge ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "The values that one might find or configure for
       variables bounded by the maximum age of an LSA."
    SYNTAX      Integer32 (0..3600)


--  The range of ifIndex

InterfaceIndex ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "The range of ifIndex."
    SYNTAX      Integer32


--  Potential Priorities for the Designated Router Election

DesignatedRouterPriority ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "The values defined for the priority of a system for
       becoming the designated router."
    SYNTAX      Integer32 (0..'FF'h)

TOSType ::= TEXTUAL-CONVENTION
    STATUS      current
    DESCRIPTION
       "Type of Service is defined as a mapping to the IP Type of
       Service Flags as defined in the IP Forwarding Table MIB

       +-----+-----+-----+-----+-----+-----+-----+-----+
       |                 |                       |     |
       |   PRECEDENCE    |    TYPE OF SERVICE    |  0  |
       |                 |                       |     |
       +-----+-----+-----+-----+-----+-----+-----+-----+

                IP TOS                IP TOS
           Field     Policy      Field     Policy





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           Contents    Code      Contents    Code
           0 0 0 0  ==>   0      0 0 0 1  ==>   2
           0 0 1 0  ==>   4      0 0 1 1  ==>   6
           0 1 0 0  ==>   8      0 1 0 1  ==>  10
           0 1 1 0  ==>  12      0 1 1 1  ==>  14
           1 0 0 0  ==>  16      1 0 0 1  ==>  18
           1 0 1 0  ==>  20      1 0 1 1  ==>  22
           1 1 0 0  ==>  24      1 1 0 1  ==>  26
           1 1 1 0  ==>  28      1 1 1 1  ==>  30

       The remaining values are left for future definition."
    SYNTAX      Integer32 (0..30)






































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--  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 }















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    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 }














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    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 }











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    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 }



























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    ospfExtLsdbLimit OBJECT-TYPE
        SYNTAX   Integer32 (-1..'7FFFFFFF'h)
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "The maximum number of external link-state  en-
           tries  that can be stored in the link-state da-
           tabase.  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 }





























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    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 }

















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    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 }





































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--      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,





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        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 }












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    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 }












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    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 }












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    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 }

















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--  OSPF Area Default Metric Table

--      The OSPF Area Default Metric Table describes the metrics
--      that a default Area Border Router will advertise into a
--      Stub area.


    ospfStubAreaTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfStubAreaEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The set of metrics that will be advertised  by
           a default Area Border Router into a stub area."
       REFERENCE
          "OSPF Version 2, Appendix C.2, Area Parameters"
      ::= { ospf 3 }


    ospfStubAreaEntry OBJECT-TYPE
        SYNTAX   OspfStubAreaEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The metric for a given Type  of  Service  that
           will  be  advertised  by  a default Area Border
           Router into a stub area."
       REFERENCE
          "OSPF Version 2, Appendix C.2, Area Parameters"
      INDEX { ospfStubAreaId, ospfStubTOS }
      ::= { ospfStubAreaTable 1 }

OspfStubAreaEntry ::=
    SEQUENCE {
        ospfStubAreaId
            AreaID,
        ospfStubTOS
            TOSType,
        ospfStubMetric
            BigMetric,
        ospfStubStatus
            RowStatus,
        ospfStubMetricType
            INTEGER
              }





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    ospfStubAreaId OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The 32 bit identifier for the Stub  Area.   On
           creation,  this  can  be  derived  from the in-
           stance."
       ::= { ospfStubAreaEntry 1 }


    ospfStubTOS OBJECT-TYPE
        SYNTAX   TOSType
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The  Type  of  Service  associated  with   the
           metric.   On creation, this can be derived from
           the instance."
       ::= { ospfStubAreaEntry 2 }


    ospfStubMetric OBJECT-TYPE
        SYNTAX   BigMetric
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The metric value applied at the indicated type
           of  service.  By default, this equals the least
           metric at the type of service among the  inter-
           faces to other areas."
       ::= { ospfStubAreaEntry 3 }


    ospfStubStatus 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."
       ::= { ospfStubAreaEntry 4 }






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    ospfStubMetricType OBJECT-TYPE
        SYNTAX   INTEGER    {
                    ospfMetric (1),                -- OSPF Metric
                    comparableCost (2),        -- external type 1
                    nonComparable  (3)        -- external type 2
                  }
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "This variable displays the type of metric  ad-
           vertised as a default route."
       DEFVAL   { ospfMetric }
       ::= { ospfStubAreaEntry 5 }





































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--  OSPF Link State Database

--      The Link State Database contains the Link State
--      Advertisements from throughout the areas that the
--      device is attached to.


    ospfLsdbTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfLsdbEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The OSPF Process's Link State Database."
       REFERENCE
          "OSPF Version 2, Section 12  Link  State  Adver-
          tisements"
      ::= { ospf 4 }


    ospfLsdbEntry OBJECT-TYPE
        SYNTAX   OspfLsdbEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "A single Link State Advertisement."
       INDEX { ospfLsdbAreaId, ospfLsdbType,
               ospfLsdbLsid, ospfLsdbRouterId }
       ::= { ospfLsdbTable 1 }

OspfLsdbEntry ::=
    SEQUENCE {
        ospfLsdbAreaId
            AreaID,
        ospfLsdbType
            INTEGER,
        ospfLsdbLsid
            IpAddress,
        ospfLsdbRouterId
            RouterID,
        ospfLsdbSequence
            Integer32,
        ospfLsdbAge
            Integer32,
        ospfLsdbChecksum
            Integer32,





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        ospfLsdbAdvertisement
            OCTET STRING
              }

    ospfLsdbAreaId OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The 32 bit identifier of the Area  from  which
           the LSA was received."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfLsdbEntry 1 }

-- External Link State Advertisements are permitted
-- for backward compatibility, but should be displayed in
-- the ospfExtLsdbTable rather than here.

    ospfLsdbType OBJECT-TYPE
        SYNTAX   INTEGER    {
                    routerLink (1),
                    networkLink (2),
                    summaryLink (3),
                    asSummaryLink (4),
                    asExternalLink (5), -- but see ospfExtLsdbTable
                    multicastLink (6),
                    nssaExternalLink (7)
                  }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The type  of  the  link  state  advertisement.
           Each  link state type has a separate advertise-
           ment format."
       REFERENCE
          "OSPF Version 2, Appendix A.4.1 The  Link  State
          Advertisement header"
      ::= { ospfLsdbEntry 2 }











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    ospfLsdbLsid OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The Link State ID is an LS Type Specific field
           containing either a Router ID or an IP Address;
           it identifies the piece of the  routing  domain
           that is being described by the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.4 Link State ID"
      ::= { ospfLsdbEntry 3 }


    ospfLsdbRouterId OBJECT-TYPE
        SYNTAX   RouterID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The 32 bit number that uniquely identifies the
           originating router in the Autonomous System."
       REFERENCE
          "OSPF Version 2, Appendix C.1 Global parameters"
      ::= { ospfLsdbEntry 4 }

--  Note that the OSPF Sequence Number is a 32 bit signed
--  integer.  It starts with the value '80000001'h,
--  or -'7FFFFFFF'h, and increments until '7FFFFFFF'h
--  Thus, a typical sequence number will be very negative.





















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    ospfLsdbSequence OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The sequence number field is a  signed  32-bit
           integer.   It  is used to detect old and dupli-
           cate link state advertisements.  The  space  of
           sequence  numbers  is  linearly  ordered.   The
           larger the sequence number the more recent  the
           advertisement."
       REFERENCE
          "OSPF Version  2,  Section  12.1.6  LS  sequence
          number"
      ::= { ospfLsdbEntry 5 }


    ospfLsdbAge OBJECT-TYPE
        SYNTAX   Integer32    -- Should be 0..MaxAge
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "This field is the age of the link state adver-
           tisement in seconds."
       REFERENCE
          "OSPF Version 2, Section 12.1.1 LS age"
      ::= { ospfLsdbEntry 6 }























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    ospfLsdbChecksum OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "This field is the  checksum  of  the  complete
           contents  of  the  advertisement, excepting the
           age field.  The age field is excepted  so  that
           an   advertisement's  age  can  be  incremented
           without updating the  checksum.   The  checksum
           used  is  the same that is used for ISO connec-
           tionless datagrams; it is commonly referred  to
           as the Fletcher checksum."
       REFERENCE
          "OSPF Version 2, Section 12.1.7 LS checksum"
      ::= { ospfLsdbEntry 7 }


    ospfLsdbAdvertisement OBJECT-TYPE
        SYNTAX   OCTET STRING (SIZE (1..65535))
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The entire Link State Advertisement, including
           its header."
       REFERENCE
          "OSPF Version 2, Section 12  Link  State  Adver-
          tisements"
      ::= { ospfLsdbEntry 8 }





















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--  Address Range Table

--      The Address Range Table acts as an adjunct to the Area
--      Table; It describes those Address Range Summaries that
--      are configured to be propagated from an Area to reduce
--      the amount of information about it which is known beyond
--      its borders.

    ospfAreaRangeTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfAreaRangeEntry
        MAX-ACCESS   not-accessible
        STATUS   obsolete
        DESCRIPTION
           "A range if IP addresses  specified  by  an  IP
           address/IP  network  mask  pair.   For example,
           class B address range of X.X.X.X with a network
           mask  of  255.255.0.0 includes all IP addresses
           from X.X.0.0 to X.X.255.255"
       REFERENCE
          "OSPF Version 2, Appendix C.2  Area parameters"
      ::= { ospf 5 }


    ospfAreaRangeEntry OBJECT-TYPE
        SYNTAX   OspfAreaRangeEntry
        MAX-ACCESS   not-accessible
        STATUS   obsolete
        DESCRIPTION
           "A range if IP addresses  specified  by  an  IP
           address/IP  network  mask  pair.   For example,
           class B address range of X.X.X.X with a network
           mask  of  255.255.0.0 includes all IP addresses
           from X.X.0.0 to X.X.255.255"
       REFERENCE
          "OSPF Version 2, Appendix C.2  Area parameters"
      INDEX { ospfAreaRangeAreaId, ospfAreaRangeNet }
      ::= { ospfAreaRangeTable 1 }

OspfAreaRangeEntry ::=
    SEQUENCE {
        ospfAreaRangeAreaId
            AreaID,
        ospfAreaRangeNet
            IpAddress,
        ospfAreaRangeMask





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            IpAddress,
        ospfAreaRangeStatus
            RowStatus,
        ospfAreaRangeEffect
            INTEGER
              }

    ospfAreaRangeAreaId OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-only
        STATUS   obsolete
        DESCRIPTION
           "The Area the Address  Range  is  to  be  found
           within."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfAreaRangeEntry 1 }


    ospfAreaRangeNet OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   obsolete
        DESCRIPTION
           "The IP Address of the Net or Subnet  indicated
           by the range."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfAreaRangeEntry 2 }


    ospfAreaRangeMask OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-create
        STATUS   obsolete
        DESCRIPTION
           "The Subnet Mask that pertains to  the  Net  or
           Subnet."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfAreaRangeEntry 3 }









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    ospfAreaRangeStatus OBJECT-TYPE
        SYNTAX   RowStatus
        MAX-ACCESS   read-create
        STATUS   obsolete
        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."
       ::= { ospfAreaRangeEntry 4 }


    ospfAreaRangeEffect OBJECT-TYPE
        SYNTAX   INTEGER    {
                    advertiseMatching (1),
                    doNotAdvertiseMatching (2)
                  }
        MAX-ACCESS   read-create
        STATUS   obsolete
        DESCRIPTION
           "Subnets subsumed by ranges either trigger  the
           advertisement  of the indicated summary (adver-
           tiseMatching), or result in  the  subnet's  not
           being advertised at all outside the area."
       DEFVAL   { advertiseMatching }
       ::= { ospfAreaRangeEntry 5 }
























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--  OSPF Host Table

--      The Host/Metric Table indicates what hosts are directly
--      attached to the Router, and what metrics and types of
--      service should be advertised for them.

    ospfHostTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfHostEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The list of Hosts, and their metrics, that the
           router will advertise as host routes."
       REFERENCE
          "OSPF Version 2, Appendix C.6  Host route param-
          eters"
      ::= { ospf 6 }


    ospfHostEntry OBJECT-TYPE
        SYNTAX   OspfHostEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "A metric to be advertised, for a given type of
           service, when a given host is reachable."
       INDEX { ospfHostIpAddress, ospfHostTOS }
       ::= { ospfHostTable 1 }

OspfHostEntry ::=
    SEQUENCE {
        ospfHostIpAddress
            IpAddress,
        ospfHostTOS
            TOSType,
        ospfHostMetric
            Metric,
        ospfHostStatus
            RowStatus,
        ospfHostAreaID
            AreaID
              }








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    ospfHostIpAddress OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The IP Address of the Host."
       REFERENCE
          "OSPF Version 2, Appendix C.6 Host route parame-
          ters"
      ::= { ospfHostEntry 1 }


    ospfHostTOS OBJECT-TYPE
        SYNTAX   TOSType
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The Type of Service of the route being config-
           ured."
       REFERENCE
          "OSPF Version 2, Appendix C.6 Host route parame-
          ters"
      ::= { ospfHostEntry 2 }


    ospfHostMetric OBJECT-TYPE
        SYNTAX   Metric
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The Metric to be advertised."
       REFERENCE
          "OSPF Version 2, Appendix C.6 Host route parame-
          ters"
      ::= { ospfHostEntry 3 }















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    ospfHostStatus 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."
       ::= { ospfHostEntry 4 }


    ospfHostAreaID OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The Area the Host Entry is to be found within.
           By  default, the area that a subsuming OSPF in-
           terface is in, or 0.0.0.0"
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfHostEntry 5 }



























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--  OSPF Interface Table

--      The OSPF Interface Table augments the ipAddrTable
--             with OSPF specific information.

    ospfIfTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfIfEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The OSPF Interface Table describes the  inter-
           faces from the viewpoint of OSPF."
       REFERENCE
          "OSPF Version 2, Appendix C.3  Router  interface
          parameters"
      ::= { ospf 7 }


    ospfIfEntry OBJECT-TYPE
        SYNTAX   OspfIfEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The OSPF Interface Entry describes one  inter-
           face from the viewpoint of OSPF."
       INDEX { ospfIfIpAddress, ospfAddressLessIf }
       ::= { ospfIfTable 1 }

OspfIfEntry ::=
    SEQUENCE {
        ospfIfIpAddress
            IpAddress,
        ospfAddressLessIf
            Integer32,
        ospfIfAreaId
            AreaID,
        ospfIfType
            INTEGER,
        ospfIfAdminStat
            Status,
        ospfIfRtrPriority
            DesignatedRouterPriority,
        ospfIfTransitDelay
            UpToMaxAge,
        ospfIfRetransInterval





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            UpToMaxAge,
        ospfIfHelloInterval
            HelloRange,
        ospfIfRtrDeadInterval
            PositiveInteger,
        ospfIfPollInterval
            PositiveInteger,
        ospfIfState
            INTEGER,
        ospfIfDesignatedRouter
            IpAddress,
        ospfIfBackupDesignatedRouter
            IpAddress,
        ospfIfEvents
            Counter32,
        ospfIfAuthType
            INTEGER,
        ospfIfAuthKey
            OCTET STRING,
        ospfIfStatus
            RowStatus,
        ospfIfMulticastForwarding
            INTEGER,
        ospfIfDemand
            TruthValue
              }

    ospfIfIpAddress OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The IP address of this OSPF interface."
       ::= { ospfIfEntry 1 }
















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    ospfAddressLessIf OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "For the purpose of easing  the  instancing  of
           addressed   and  addressless  interfaces;  This
           variable takes the value 0 on  interfaces  with
           IP  Addresses,  and  the corresponding value of
           ifIndex for interfaces having no IP Address."
       ::= { ospfIfEntry 2 }


    ospfIfAreaId OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "A 32-bit integer uniquely identifying the area
           to  which  the  interface  connects.   Area  ID
           0.0.0.0 is used for the OSPF backbone."
       DEFVAL   { '00000000'H }    -- 0.0.0.0
       ::= { ospfIfEntry 3 }



























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    ospfIfType OBJECT-TYPE
        SYNTAX   INTEGER    {
                    broadcast (1),
                    nbma (2),
                    pointToPoint (3),
                    pointToMultipoint (5)
                  }
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The OSPF interface type.

           By way of a default, this field may be intuited
           from the corresponding value of ifType.  Broad-
           cast LANs, such as  Ethernet  and  IEEE  802.5,
           take  the  value  'broadcast', X.25 and similar
           technologies take the value 'nbma',  and  links
           that  are  definitively point to point take the
           value 'pointToPoint'."
       ::= { ospfIfEntry 4 }


    ospfIfAdminStat OBJECT-TYPE
        SYNTAX   Status
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The OSPF  interface's  administrative  status.
           The  value formed on the interface, and the in-
           terface will be advertised as an internal route
           to  some  area.   The  value 'disabled' denotes
           that the interface is external to OSPF."
       DEFVAL { enabled }
       ::= { ospfIfEntry 5 }
















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    ospfIfRtrPriority OBJECT-TYPE
        SYNTAX   DesignatedRouterPriority
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The  priority  of  this  interface.   Used  in
           multi-access  networks,  this  field is used in
           the designated router election algorithm.   The
           value 0 signifies that the router is not eligi-
           ble to become the  designated  router  on  this
           particular  network.   In the event of a tie in
           this value, routers will use their Router ID as
           a tie breaker."
       DEFVAL { 1 }
       ::= { ospfIfEntry 6 }


    ospfIfTransitDelay 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 }
       ::= { ospfIfEntry 7 }


    ospfIfRetransInterval 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."
       DEFVAL { 5 }
       ::= { ospfIfEntry 8 }









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    ospfIfHelloInterval 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  all
           routers attached to a common network."
       DEFVAL { 10 }
       ::= { ospfIfEntry 9 }


    ospfIfRtrDeadInterval 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 all routers attached
           to a common network."
       DEFVAL { 40 }
       ::= { ospfIfEntry 10 }


    ospfIfPollInterval OBJECT-TYPE
        SYNTAX   PositiveInteger
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The larger time interval, in seconds,  between
           the  Hello  packets  sent  to  an inactive non-
           broadcast multi- access neighbor."
       DEFVAL { 120 }
       ::= { ospfIfEntry 11 }












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    ospfIfState OBJECT-TYPE
        SYNTAX   INTEGER    {
                    down (1),
                    loopback (2),
                    waiting (3),
                    pointToPoint (4),
                    designatedRouter (5),
                    backupDesignatedRouter (6),
                    otherDesignatedRouter (7)
                  }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The OSPF Interface State."
       DEFVAL { down }
       ::= { ospfIfEntry 12 }


    ospfIfDesignatedRouter OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The IP Address of the Designated Router."
       DEFVAL   { '00000000'H }    -- 0.0.0.0
       ::= { ospfIfEntry 13 }


    ospfIfBackupDesignatedRouter OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The  IP  Address  of  the  Backup   Designated
           Router."
       DEFVAL   { '00000000'H }    -- 0.0.0.0
       ::= { ospfIfEntry 14 }













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    ospfIfEvents OBJECT-TYPE
        SYNTAX   Counter32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The number of times this  OSPF  interface  has
           changed its state, or an error has occurred."
       ::= { ospfIfEntry 15 }


    ospfIfAuthKey OBJECT-TYPE
        SYNTAX   OCTET STRING (SIZE (0..256))
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The Authentication Key.  If the Area's Author-
           ization  Type  is  simplePassword,  and the key
           length is shorter than 8 octets, the agent will
           left adjust and zero fill to 8 octets.

           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, ospfIfAuthKey always returns an  Oc-
           tet 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
      ::= { ospfIfEntry 16 }
















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    ospfIfStatus 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."
       ::= { ospfIfEntry 17 }


    ospfIfMulticastForwarding OBJECT-TYPE
        SYNTAX   INTEGER    {
                            blocked (1),        -- no multicast forwarding
                            multicast (2),        -- using multicast address
                            unicast (3)        -- to each OSPF neighbor
                  }
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The way multicasts should  forwarded  on  this
           interface;  not  forwarded,  forwarded  as data
           link multicasts, or forwarded as data link uni-
           casts.   Data link multicasting is not meaning-
           ful on point to point and NBMA interfaces,  and
           setting ospfMulticastForwarding to 0 effective-
           ly disables all multicast forwarding."
       DEFVAL { blocked }
       ::= { ospfIfEntry 18 }


    ospfIfDemand OBJECT-TYPE
        SYNTAX   TruthValue
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "Indicates whether Demand OSPF procedures (hel-
           lo supression to FULL neighbors and setting the
           DoNotAge flag on proogated LSAs) should be per-
           formed on this interface."
       DEFVAL { false }
       ::= { ospfIfEntry 19 }







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    ospfIfAuthType 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  an  in-
           terface.   Additional  authentication types may
           be assigned locally."
       REFERENCE
          "OSPF Version 2, Appendix E Authentication"
      DEFVAL { 0 }        -- no authentication, by default
      ::= { ospfIfEntry 20 }


































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--  OSPF Interface Metric Table

--      The Metric Table describes the metrics to be advertised
--      for a specified interface at the various types of service.
--      As such, this table is an adjunct of the OSPF Interface
--      Table.

-- Types of service, as defined by RFC 791, have the ability
-- to request low delay, high bandwidth, or reliable linkage.

-- For the purposes of this specification, the measure of
-- bandwidth

--      Metric = 10^8 / ifSpeed

-- is the default value.  For multiple link interfaces, note
-- that ifSpeed is the sum of the individual link speeds.
-- This yields a number having the following typical values:

--      Network Type/bit rate   Metric

--      >= 100 MBPS                 1
--      Ethernet/802.3             10
--      E1                         48
--      T1 (ESF)                   65
--       64 KBPS                 1562
--       56 KBPS                 1785
--       19.2 KBPS               5208
--        9.6 KBPS              10416

-- Routes that are not specified use the default (TOS 0) metric

    ospfIfMetricTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfIfMetricEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The TOS metrics for  a  non-virtual  interface
           identified by the interface index."
       REFERENCE
          "OSPF Version 2, Appendix C.3  Router  interface
          parameters"
      ::= { ospf 8 }







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    ospfIfMetricEntry OBJECT-TYPE
        SYNTAX   OspfIfMetricEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "A particular TOS metric for a non-virtual  in-
           terface identified by the interface index."
       REFERENCE
          "OSPF Version 2, Appendix C.3  Router  interface
          parameters"
      INDEX { ospfIfMetricIpAddress,
  ospfIfMetricAddressLessIf,
  ospfIfMetricTOS }
      ::= { ospfIfMetricTable 1 }

OspfIfMetricEntry ::=
    SEQUENCE {
        ospfIfMetricIpAddress
            IpAddress,
        ospfIfMetricAddressLessIf
            Integer32,
        ospfIfMetricTOS
            TOSType,
        ospfIfMetricValue
            Metric,
        ospfIfMetricStatus
            RowStatus
              }

    ospfIfMetricIpAddress OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The IP address of this OSPF interface.  On row
           creation,  this  can  be  derived  from the in-
           stance."
       ::= { ospfIfMetricEntry 1 }












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    ospfIfMetricAddressLessIf OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "For the purpose of easing  the  instancing  of
           addressed   and  addressless  interfaces;  This
           variable takes the value 0 on  interfaces  with
           IP  Addresses, and the value of ifIndex for in-
           terfaces having no IP Address.   On  row  crea-
           tion, this can be derived from the instance."
       ::= { ospfIfMetricEntry 2 }


    ospfIfMetricTOS OBJECT-TYPE
        SYNTAX   TOSType
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The type of service metric  being  referenced.
           On  row  creation, this can be derived from the
           instance."
       ::= { ospfIfMetricEntry 3 }


    ospfIfMetricValue OBJECT-TYPE
        SYNTAX   Metric
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The metric of using this type  of  service  on
           this interface.  The default value of the TOS 0
           Metric is 10^8 / ifSpeed."
       ::= { ospfIfMetricEntry 4 }
















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    ospfIfMetricStatus 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."
       ::= { ospfIfMetricEntry 5 }








































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--  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





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            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 }












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    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 }








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    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 }





























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    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 }















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    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 }


































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--  OSPF Neighbor Table

--      The OSPF Neighbor Table describes all neighbors in
--      the locality of the subject router.

    ospfNbrTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfNbrEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "A table of non-virtual neighbor information."
       REFERENCE
          "OSPF Version 2, Section 10  The  Neighbor  Data
          Structure"
      ::= { ospf 10 }


    ospfNbrEntry OBJECT-TYPE
        SYNTAX   OspfNbrEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The information regarding a single neighbor."
       REFERENCE
          "OSPF Version 2, Section 10  The  Neighbor  Data
          Structure"
      INDEX { ospfNbrIpAddr, ospfNbrAddressLessIndex }
      ::= { ospfNbrTable 1 }

OspfNbrEntry ::=
    SEQUENCE {
        ospfNbrIpAddr
            IpAddress,
        ospfNbrAddressLessIndex
            InterfaceIndex,
        ospfNbrRtrId
            RouterID,
        ospfNbrOptions
            Integer32,
        ospfNbrPriority
            DesignatedRouterPriority,
        ospfNbrState
            INTEGER,
        ospfNbrEvents
            Counter32,





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        ospfNbrLsRetransQLen
            Gauge32,
        ospfNbmaNbrStatus
            RowStatus,
        ospfNbmaNbrPermanence
            INTEGER,
        ospfNbrHelloSuppressed
            TruthValue
              }

    ospfNbrIpAddr OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The IP address this neighbor is using  in  its
           IP  Source  Address.  Note that, on addressless
           links, this will not be 0.0.0.0,  but  the  ad-
           dress of another of the neighbor's interfaces."
       ::= { ospfNbrEntry 1 }


    ospfNbrAddressLessIndex OBJECT-TYPE
        SYNTAX   InterfaceIndex
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "On an interface having an  IP  Address,  zero.
           On  addressless  interfaces,  the corresponding
           value of ifIndex in the Internet Standard  MIB.
           On  row  creation, this can be derived from the
           instance."
       ::= { ospfNbrEntry 2 }

















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    ospfNbrRtrId OBJECT-TYPE
        SYNTAX   RouterID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "A 32-bit integer (represented as a type  IpAd-
           dress)  uniquely  identifying  the  neighboring
           router in the Autonomous System."
       DEFVAL   { '00000000'H }    -- 0.0.0.0
       ::= { ospfNbrEntry 3 }


    ospfNbrOptions OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "A Bit Mask corresponding to the neighbor's op-
           tions field.

           Bit 0, if set, indicates that the  system  will
           operate  on  Type of Service metrics other than
           TOS 0.  If zero, the neighbor will  ignore  all
           metrics except the TOS 0 metric.

           Bit 1, if set, indicates  that  the  associated
           area  accepts and operates on external informa-
           tion; if zero, it is a stub area.

           Bit 2, if set, indicates that the system is ca-
           pable  of routing IP Multicast datagrams; i.e.,
           that it implements the Multicast Extensions  to
           OSPF.

           Bit 3, if set, indicates  that  the  associated
           area  is  an  NSSA.  These areas are capable of
           carrying type 7 external advertisements,  which
           are  translated into type 5 external advertise-
           ments at NSSA borders."
       REFERENCE
          "OSPF Version 2, Section 12.1.2 Options"
      DEFVAL { 0 }
      ::= { ospfNbrEntry 4 }







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    ospfNbrPriority OBJECT-TYPE
        SYNTAX   DesignatedRouterPriority
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "The priority of this neighbor in the designat-
           ed router election algorithm.  The value 0 sig-
           nifies that the neighbor is not eligible to be-
           come  the  designated router on this particular
           network."
       DEFVAL { 1 }
       ::= { ospfNbrEntry 5 }


    ospfNbrState OBJECT-TYPE
        SYNTAX   INTEGER    {
                    down (1),
                    attempt (2),
                    init (3),
                    twoWay (4),
                    exchangeStart (5),
                    exchange (6),
                    loading (7),
                    full (8)
                  }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The State of the relationship with this Neigh-
           bor."
       REFERENCE
          "OSPF Version 2, Section 10.1 Neighbor States"
      DEFVAL   { down }
      ::= { ospfNbrEntry 6 }


    ospfNbrEvents OBJECT-TYPE
        SYNTAX   Counter32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The number of times this neighbor relationship
           has changed state, or an error has occurred."
       ::= { ospfNbrEntry 7 }






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    ospfNbrLsRetransQLen OBJECT-TYPE
        SYNTAX   Gauge32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The  current  length  of  the   retransmission
           queue."
       ::= { ospfNbrEntry 8 }


    ospfNbmaNbrStatus 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."
       ::= { ospfNbrEntry 9 }


    ospfNbmaNbrPermanence OBJECT-TYPE
        SYNTAX   INTEGER    {
                    dynamic (1),        -- learned through protocol
                    permanent (2)       -- configured address
                  }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "This variable displays the status of  the  en-
           try.   'dynamic'  and  'permanent' refer to how
           the neighbor became known."
       DEFVAL { permanent }
       ::= { ospfNbrEntry 10 }















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    ospfNbrHelloSuppressed OBJECT-TYPE
        SYNTAX   TruthValue
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "Indicates whether Hellos are being  suppressed
           to the neighbor"
       ::= { ospfNbrEntry 11 }










































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--  OSPF Virtual Neighbor Table

--      This table describes all virtual neighbors.
--      Since Virtual Links are configured in the
--      virtual interface table, this table is read-only.

    ospfVirtNbrTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfVirtNbrEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "A table of virtual neighbor information."
       REFERENCE
          "OSPF Version 2, Section 15  Virtual Links"
      ::= { ospf 11 }


    ospfVirtNbrEntry OBJECT-TYPE
        SYNTAX   OspfVirtNbrEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "Virtual neighbor information."
       INDEX { ospfVirtNbrArea, ospfVirtNbrRtrId }
       ::= { ospfVirtNbrTable 1 }

OspfVirtNbrEntry ::=
    SEQUENCE {
        ospfVirtNbrArea
            AreaID,
        ospfVirtNbrRtrId
            RouterID,
        ospfVirtNbrIpAddr
            IpAddress,
        ospfVirtNbrOptions
            Integer32,
        ospfVirtNbrState
            INTEGER,
        ospfVirtNbrEvents
            Counter32,
        ospfVirtNbrLsRetransQLen
            Gauge32
              }







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    ospfVirtNbrArea OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The Transit Area Identifier."
       ::= { ospfVirtNbrEntry 1 }


    ospfVirtNbrRtrId OBJECT-TYPE
        SYNTAX   RouterID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "A  32-bit  integer  uniquely  identifying  the
           neighboring router in the Autonomous System."
       ::= { ospfVirtNbrEntry 2 }


    ospfVirtNbrIpAddr OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The IP address this Virtual  Neighbor  is  us-
           ing."
       ::= { ospfVirtNbrEntry 3 }























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    ospfVirtNbrOptions OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "A Bit Mask corresponding to the neighbor's op-
           tions field.

           Bit 1, if set, indicates that the  system  will
           operate  on  Type of Service metrics other than
           TOS 0.  If zero, the neighbor will  ignore  all
           metrics except the TOS 0 metric.

           Bit 2, if set, indicates  that  the  system  is
           Network  Multicast  capable; ie, that it imple-
           ments OSPF Multicast Routing."
       ::= { ospfVirtNbrEntry 4 }


    ospfVirtNbrState OBJECT-TYPE
        SYNTAX   INTEGER    {
                    down (1),
                    attempt (2),
                    init (3),
                    twoWay (4),
                    exchangeStart (5),
                    exchange (6),
                    loading (7),
                    full (8)
                  }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The state of the  Virtual  Neighbor  Relation-
           ship."
       ::= { ospfVirtNbrEntry 5 }














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    ospfVirtNbrEvents OBJECT-TYPE
        SYNTAX   Counter32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The number of  times  this  virtual  link  has
           changed its state, or an error has occurred."
       ::= { ospfVirtNbrEntry 6 }


    ospfVirtNbrLsRetransQLen OBJECT-TYPE
        SYNTAX   Gauge32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The  current  length  of  the   retransmission
           queue."
       ::= { ospfVirtNbrEntry 7 }
































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--  OSPF Link State Database, External

--      The Link State Database contains the Link State
--      Advertisements from throughout the areas that the
--      device is attached to.

--             This table is identical to the OSPF LSDB Table in
--      format, but contains only External Link State
--             Advertisements.  The purpose is to allow external
--      LSAs to be displayed once for the router rather
--      than once in each non-stub area.

    ospfExtLsdbTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfExtLsdbEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "The OSPF Process's Links State Database."
       REFERENCE
          "OSPF Version 2, Section 12  Link  State  Adver-
          tisements"
      ::= { ospf 12 }


    ospfExtLsdbEntry OBJECT-TYPE
        SYNTAX   OspfExtLsdbEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "A single Link State Advertisement."
       INDEX { ospfExtLsdbType, ospfExtLsdbLsid, ospfExtLsdbRouterId }
       ::= { ospfExtLsdbTable 1 }

OspfExtLsdbEntry ::=
    SEQUENCE {
        ospfExtLsdbType
            INTEGER,
        ospfExtLsdbLsid
            IpAddress,
        ospfExtLsdbRouterId
            RouterID,
        ospfExtLsdbSequence
            Integer32,
        ospfExtLsdbAge
            Integer32,





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        ospfExtLsdbChecksum
            Integer32,
        ospfExtLsdbAdvertisement
            OCTET STRING
              }

    ospfExtLsdbType OBJECT-TYPE
        SYNTAX   INTEGER    {
                    asExternalLink (5)
                  }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The type  of  the  link  state  advertisement.
           Each  link state type has a separate advertise-
           ment format."
       REFERENCE
          "OSPF Version 2, Appendix A.4.1 The  Link  State
          Advertisement header"
      ::= { ospfExtLsdbEntry 1 }


    ospfExtLsdbLsid OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The Link State ID is an LS Type Specific field
           containing either a Router ID or an IP Address;
           it identifies the piece of the  routing  domain
           that is being described by the advertisement."
       REFERENCE
          "OSPF Version 2, Section 12.1.4 Link State ID"
      ::= { ospfExtLsdbEntry 2 }
















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    ospfExtLsdbRouterId OBJECT-TYPE
        SYNTAX   RouterID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The 32 bit number that uniquely identifies the
           originating router in the Autonomous System."
       REFERENCE
          "OSPF Version 2, Appendix C.1 Global parameters"
      ::= { ospfExtLsdbEntry 3 }

--  Note that the OSPF Sequence Number is a 32 bit signed
--  integer.  It starts with the value '80000001'h,
--  or -'7FFFFFFF'h, and increments until '7FFFFFFF'h
--  Thus, a typical sequence number will be very negative.

    ospfExtLsdbSequence OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The sequence number field is a  signed  32-bit
           integer.   It  is used to detect old and dupli-
           cate link state advertisements.  The  space  of
           sequence  numbers  is  linearly  ordered.   The
           larger the sequence number the more recent  the
           advertisement."
       REFERENCE
          "OSPF Version  2,  Section  12.1.6  LS  sequence
          number"
      ::= { ospfExtLsdbEntry 4 }


    ospfExtLsdbAge OBJECT-TYPE
        SYNTAX   Integer32    -- Should be 0..MaxAge
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "This field is the age of the link state adver-
           tisement in seconds."
       REFERENCE
          "OSPF Version 2, Section 12.1.1 LS age"
      ::= { ospfExtLsdbEntry 5 }







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    ospfExtLsdbChecksum OBJECT-TYPE
        SYNTAX   Integer32
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "This field is the  checksum  of  the  complete
           contents  of  the  advertisement, excepting the
           age field.  The age field is excepted  so  that
           an   advertisement's  age  can  be  incremented
           without updating the  checksum.   The  checksum
           used  is  the same that is used for ISO connec-
           tionless datagrams; it is commonly referred  to
           as the Fletcher checksum."
       REFERENCE
          "OSPF Version 2, Section 12.1.7 LS checksum"
      ::= { ospfExtLsdbEntry 6 }


    ospfExtLsdbAdvertisement OBJECT-TYPE
        SYNTAX   OCTET STRING (SIZE(36))
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The entire Link State Advertisement, including
           its header."
       REFERENCE
          "OSPF Version 2, Section 12  Link  State  Adver-
          tisements"
      ::= { ospfExtLsdbEntry 7 }





















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--  OSPF Use of the CIDR Route Table

ospfRouteGroup           OBJECT IDENTIFIER ::= { ospf 13 }

-- The IP Forwarding Table defines a number of objects for use by
-- the routing protocol to externalize its information.  Most of
-- the variables (ipForwardDest, ipForwardMask, ipForwardPolicy,
-- ipForwardNextHop, ipForwardIfIndex, ipForwardType,
-- ipForwardProto, ipForwardAge, and ipForwardNextHopAS) are
-- defined there.

-- Those that leave some discretion are defined here.

-- ipCidrRouteProto is, of course, ospf (13).

-- ipCidrRouteAge is the time since the route was first calculated,
-- as opposed to the time since the last SPF run.

-- ipCidrRouteInfo is an OBJECT IDENTIFIER for use by the routing
-- protocol.  The following values shall be found there depending
-- on the way the route was calculated.

ospfIntraArea      OBJECT IDENTIFIER ::= { ospfRouteGroup 1 }
ospfInterArea      OBJECT IDENTIFIER ::= { ospfRouteGroup 2 }
ospfExternalType1  OBJECT IDENTIFIER ::= { ospfRouteGroup 3 }
ospfExternalType2  OBJECT IDENTIFIER ::= { ospfRouteGroup 4 }

-- ipCidrRouteMetric1 is, by definition, the primary routing
-- metric.  Therefore, it should be the metric that route
-- selection is based on.  For intra-area and inter-area routes,
-- it is an OSPF metric.  For External Type 1 (comparable value)
-- routes, it is an OSPF metric plus the External Metric.  For
-- external Type 2 (non-comparable value) routes, it is the
-- external metric.

-- ipCidrRouteMetric2 is, by definition, a secondary routing
-- metric.  Therefore, it should be the metric that breaks a tie
-- among routes having equal metric1 values and the same
-- calculation rule.  For intra-area, inter-area routes, and
-- External Type 1 (comparable value) routes, it is unused.  For
-- external Type 2 (non-comparable value) routes, it is the metric
-- to the AS border router.

-- ipCidrRouteMetric3, ipCidrRouteMetric4, and ipCidrRouteMetric5 are
-- unused.





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--
--      The OSPF Area Aggregate Table
--
--      This table replaces the OSPF Area Summary Table, being an
--      extension of that for CIDR routers.

    ospfAreaAggregateTable OBJECT-TYPE
        SYNTAX   SEQUENCE OF OspfAreaAggregateEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "A range of IP addresses  specified  by  an  IP
           address/IP  network  mask  pair.   For example,
           class B address range of X.X.X.X with a network
           mask  of  255.255.0.0 includes all IP addresses
           from X.X.0.0  to  X.X.255.255.   Note  that  if
           ranges  are configured such that one range sub-
           sumes  another  range  (e.g.,   10.0.0.0   mask
           255.0.0.0  and  10.1.0.0 mask 255.255.0.0), the
           most specific match is the preferred one."
       REFERENCE
          "OSPF Version 2, Appendix C.2  Area parameters"
      ::= { ospf 14 }


    ospfAreaAggregateEntry OBJECT-TYPE
        SYNTAX   OspfAreaAggregateEntry
        MAX-ACCESS   not-accessible
        STATUS   current
        DESCRIPTION
           "A range of IP addresses  specified  by  an  IP
           address/IP  network  mask  pair.   For example,
           class B address range of X.X.X.X with a network
           mask  of  255.255.0.0 includes all IP addresses
           from X.X.0.0  to  X.X.255.255.   Note  that  if
           ranges are range configured such that one range
           subsumes another  range  (e.g.,  10.0.0.0  mask
           255.0.0.0  and  10.1.0.0 mask 255.255.0.0), the
           most specific match is the preferred one."
       REFERENCE
          "OSPF Version 2, Appendix C.2  Area parameters"
      INDEX { ospfAreaAggregateAreaID, ospfAreaAggregateLsdbType,
              ospfAreaAggregateNet, ospfAreaAggregateMask }
      ::= { ospfAreaAggregateTable 1 }






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OspfAreaAggregateEntry ::=
    SEQUENCE {
        ospfAreaAggregateAreaID
            AreaID,
        ospfAreaAggregateLsdbType
            INTEGER,
        ospfAreaAggregateNet
            IpAddress,
        ospfAreaAggregateMask
            IpAddress,
        ospfAreaAggregateStatus
            RowStatus,
        ospfAreaAggregateEffect
            INTEGER
              }

    ospfAreaAggregateAreaID OBJECT-TYPE
        SYNTAX   AreaID
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The Area the Address Aggregate is to be  found
           within."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfAreaAggregateEntry 1 }


    ospfAreaAggregateLsdbType OBJECT-TYPE
        SYNTAX   INTEGER    {
                    summaryLink (3),
                    nssaExternalLink (7)
                  }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The type of the Address Aggregate.  This field
           specifies  the  Lsdb type that this Address Ag-
           gregate applies to."
       REFERENCE
          "OSPF Version 2, Appendix A.4.1 The  Link  State
          Advertisement header"
      ::= { ospfAreaAggregateEntry 2 }







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    ospfAreaAggregateNet OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The IP Address of the Net or Subnet  indicated
           by the range."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfAreaAggregateEntry 3 }


    ospfAreaAggregateMask OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The Subnet Mask that pertains to  the  Net  or
           Subnet."
       REFERENCE
          "OSPF Version 2, Appendix C.2 Area parameters"
      ::= { ospfAreaAggregateEntry 4 }


    ospfAreaAggregateStatus 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."
       ::= { ospfAreaAggregateEntry 5 }
















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    ospfAreaAggregateEffect OBJECT-TYPE
        SYNTAX   INTEGER    {
                    advertiseMatching (1),
                    doNotAdvertiseMatching (2)
                  }
        MAX-ACCESS   read-create
        STATUS   current
        DESCRIPTION
           "Subnets subsumed by ranges either trigger  the
           advertisement  of  the indicated aggregate (ad-
           vertiseMatching), or result in the subnet's not
           being advertised at all outside the area."
       DEFVAL   { advertiseMatching }
       ::= { ospfAreaAggregateEntry 6 }




































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-- conformance information

ospfConformance OBJECT IDENTIFIER ::= { ospf 15 }

ospfGroups      OBJECT IDENTIFIER ::= { ospfConformance 1 }
ospfCompliances OBJECT IDENTIFIER ::= { ospfConformance 2 }

-- compliance statements

    ospfCompliance MODULE-COMPLIANCE
        STATUS  current
        DESCRIPTION
           "The compliance statement "
       MODULE  -- this module
       MANDATORY-GROUPS {
                    ospfBasicGroup,
                    ospfAreaGroup,
                    ospfStubAreaGroup,
                    ospfIfGroup,
                    ospfIfMetricGroup,
                    ospfVirtIfGroup,
                    ospfNbrGroup,
                    ospfVirtNbrGroup,
                    ospfAreaAggregateGroup
           }
       ::= { ospfCompliances 1 }
























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-- units of conformance

    ospfBasicGroup    OBJECT-GROUP
        OBJECTS {
                    ospfRouterId,
                    ospfAdminStat,
                    ospfVersionNumber,
                    ospfAreaBdrRtrStatus,
                    ospfASBdrRtrStatus,
                    ospfExternLsaCount,
                    ospfExternLsaCksumSum,
                    ospfTOSSupport,
                    ospfOriginateNewLsas,
                    ospfRxNewLsas,
                    ospfExtLsdbLimit,
                    ospfMulticastExtensions,
                    ospfExitOverflowInterval
        }
        STATUS  current
        DESCRIPTION
           "These objects are required for OSPF systems."
       ::= { ospfGroups 1 }


    ospfAreaGroup    OBJECT-GROUP
        OBJECTS {
                    ospfAreaId,
                    ospfImportAsExtern,
                    ospfSpfRuns,
                    ospfAreaBdrRtrCount,
                    ospfAsBdrRtrCount,
                    ospfAreaLsaCount,
                    ospfAreaLsaCksumSum,
                    ospfAreaSummary,
                    ospfAreaStatus
        }
        STATUS  current
        DESCRIPTION
           "These objects are required  for  OSPF  systems
           supporting areas."
       ::= { ospfGroups 2 }









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    ospfStubAreaGroup    OBJECT-GROUP
        OBJECTS {
                    ospfStubAreaId,
                    ospfStubTOS,
                    ospfStubMetric,
                    ospfStubStatus,
                    ospfStubMetricType
        }
        STATUS  current
        DESCRIPTION
           "These objects are required  for  OSPF  systems
           supporting stub areas."
       ::= { ospfGroups 3 }


    ospfLsdbGroup    OBJECT-GROUP
        OBJECTS {
                    ospfLsdbAreaId,
                    ospfLsdbType,
                    ospfLsdbLsid,
                    ospfLsdbRouterId,
                    ospfLsdbSequence,
                    ospfLsdbAge,
                    ospfLsdbChecksum,
                    ospfLsdbAdvertisement
        }
        STATUS  current
        DESCRIPTION
           "These objects are required  for  OSPF  systems
           that display their link state database."
       ::= { ospfGroups 4 }



















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    ospfAreaRangeGroup    OBJECT-GROUP
        OBJECTS {
                    ospfAreaRangeAreaId,
                    ospfAreaRangeNet,
                    ospfAreaRangeMask,
                    ospfAreaRangeStatus,
                    ospfAreaRangeEffect
        }
        STATUS  obsolete
        DESCRIPTION
           "These objects are required for  non-CIDR  OSPF
           systems that support multiple areas."
       ::= { ospfGroups 5 }


    ospfHostGroup    OBJECT-GROUP
        OBJECTS {
                    ospfHostIpAddress,
                    ospfHostTOS,
                    ospfHostMetric,
                    ospfHostStatus,
                    ospfHostAreaID
        }
        STATUS  current
        DESCRIPTION
           "These objects are required  for  OSPF  systems
           that support attached hosts."
       ::= { ospfGroups 6 }






















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    ospfIfGroup    OBJECT-GROUP
        OBJECTS {
                    ospfIfIpAddress,
                    ospfAddressLessIf,
                    ospfIfAreaId,
                    ospfIfType,
                    ospfIfAdminStat,
                    ospfIfRtrPriority,
                    ospfIfTransitDelay,
                    ospfIfRetransInterval,
                    ospfIfHelloInterval,
                    ospfIfRtrDeadInterval,
                    ospfIfPollInterval,
                    ospfIfState,
                    ospfIfDesignatedRouter,
                    ospfIfBackupDesignatedRouter,
                    ospfIfEvents,
                    ospfIfAuthType,
                    ospfIfAuthKey,
                    ospfIfStatus,
                    ospfIfMulticastForwarding,
                    ospfIfDemand
        }
        STATUS  current
        DESCRIPTION
           "These objects are required for OSPF systems."
       ::= { ospfGroups 7 }


    ospfIfMetricGroup    OBJECT-GROUP
        OBJECTS {
                    ospfIfMetricIpAddress,
                    ospfIfMetricAddressLessIf,
                    ospfIfMetricTOS,
                    ospfIfMetricValue,
                    ospfIfMetricStatus
        }
        STATUS  current
        DESCRIPTION
           "These objects are required for OSPF systems."
       ::= { ospfGroups 8 }









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    ospfVirtIfGroup    OBJECT-GROUP
        OBJECTS {
                    ospfVirtIfAreaId,
                    ospfVirtIfNeighbor,
                    ospfVirtIfTransitDelay,
                    ospfVirtIfRetransInterval,
                    ospfVirtIfHelloInterval,
                    ospfVirtIfRtrDeadInterval,
                    ospfVirtIfState,
                    ospfVirtIfEvents,
                    ospfVirtIfAuthType,
                    ospfVirtIfAuthKey,
                    ospfVirtIfStatus
        }
        STATUS  current
        DESCRIPTION
           "These objects are required for OSPF systems."
       ::= { ospfGroups 9 }


    ospfNbrGroup    OBJECT-GROUP
        OBJECTS {
                    ospfNbrIpAddr,
                    ospfNbrAddressLessIndex,
                    ospfNbrRtrId,
                    ospfNbrOptions,
                    ospfNbrPriority,
                    ospfNbrState,
                    ospfNbrEvents,
                    ospfNbrLsRetransQLen,
                    ospfNbmaNbrStatus,
                    ospfNbmaNbrPermanence,
                    ospfNbrHelloSuppressed
        }
        STATUS  current
        DESCRIPTION
           "These objects are required for OSPF systems."
       ::= { ospfGroups 10 }












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    ospfVirtNbrGroup    OBJECT-GROUP
        OBJECTS {
                    ospfVirtNbrArea,
                    ospfVirtNbrRtrId,
                    ospfVirtNbrIpAddr,
                    ospfVirtNbrOptions,
                    ospfVirtNbrState,
                    ospfVirtNbrEvents,
                    ospfVirtNbrLsRetransQLen
        }
        STATUS  current
        DESCRIPTION
           "These objects are required for OSPF systems."
       ::= { ospfGroups 11 }


    ospfExtLsdbGroup    OBJECT-GROUP
        OBJECTS {
                    ospfExtLsdbType,
                    ospfExtLsdbLsid,
                    ospfExtLsdbRouterId,
                    ospfExtLsdbSequence,
                    ospfExtLsdbAge,
                    ospfExtLsdbChecksum,
                    ospfExtLsdbAdvertisement
        }
        STATUS  current
        DESCRIPTION
           "These objects are required  for  OSPF  systems
           that display their link state database."
       ::= { ospfGroups 12 }



















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    ospfAreaAggregateGroup    OBJECT-GROUP
        OBJECTS {
                    ospfAreaAggregateAreaID,
                    ospfAreaAggregateLsdbType,
                    ospfAreaAggregateNet,
                    ospfAreaAggregateMask,
                    ospfAreaAggregateStatus,
                    ospfAreaAggregateEffect
        }
        STATUS  current
        DESCRIPTION
           "These objects are required for OSPF systems."
       ::= { ospfGroups 13 }

END



































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6.  OSPF Traps

OSPF is an event driven routing protocol, where an event can
be a change in an OSPF interface's link-level status, the
expiration of an OSPF timer or the reception of an OSPF
protocol packet.  Many of the actions that OSPF takes as a
result of these events will result in a change of the routing
topology.  As routing topologies become large and complex it
is often difficult to locate the source of a topology change
or unpredicted routing path by polling a large number or
routers.  Another approach is to notify a network manager of
potentially critical OSPF events with SNMP traps.

This section defines a set of traps, objects and mechanisms to
enhance the ability to manage IP internetworks which use OSPF
as its IGP.  It is an optional but useful extension to the
OSPF MIB.

6.1.  Format Of Trap Definitions

Section A.4.0 contains contains the trap definitions using

6.2.  Approach

The mechanism for sending traps is straight-forward.  When an
exception event occurs, the application notifies the local
agent who sends a trap to the appropriate SNMP management
stations.  The message includes the trap type and may include
a list of trap specific variables.  A new object is defined in
section 5.2 that will allow a network manager to enable or
disable particular OSPF traps.  Section A.4.0 gives the trap
definitions which includes the variable lists.  The router ID
of the originator of the trap is included in the variable list
so that the network manager may easily determine the source of
the trap.

To limit the frequency of OSPF traps, the following additional
mechanisms are suggested.

6.3.  Ignoring Initial Activity

The majority of critical events occur when OSPF is enabled on
a router, at which time the designated router is elected and
neighbor adjacencies are formed.  During this initial period a
potential flood of traps is unnecessary since the events are





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expected.  To avoid unnecessary traps, a router should not
originate expected OSPF interface related traps until two of
that interface's dead timer intervals have elapsed.  The
expected OSPF interface traps are ospfIfStateChange,
ospfVirtIfStateChange, ospfNbrStateChange,
ospfVirtNbrStateChange, ospfTxRetranmit and
ospfVirtIfTxRetransmit.  Additionally, ospfMaxAgeLsa and
ospfOriginateLsa traps should not be originated until two dead
timer intervals have elapsed where the dead timer interval
used should be the dead timer with the smallest value.

6.4.  Throttling Traps

The mechanism for throttling the traps is similar to the
mechanism explained in RFC 1224 [11] section 5.  The basic
idea is that there is a sliding window in seconds and an upper
bound on the number of traps that may be generated within this
window.  Unlike RFC 1224, traps are not sent to inform the
network manager that the throttling mechanism has kicked in.

A single window should be used to throttle all OSPF traps
types except for the ospfLsdbOverflow and the
ospfLsdbApproachingOverflow trap which should not be
throttled.  For example, if the window time is 3, the upper
bound is 3 and the events that would cause trap types 1,3,5
and 7 occur within a 3 second period, the type 7 trap should
not be generated.

Appropriate values are 7 traps with a window time of 10
seconds.

6.5.  One Trap Per OSPF Event

Several of the traps defined in section A.4.0 are generated as
the result of finding an unusual condition while parsing an
OSPF packet or a processing a timer event.  There may be more
than one unusual condition detected while handling the event.
For example, a link-state update packet may contain several
retransmitted link-state advertisements (LSAs), or a
retransmitted database description packet may contain several
database description entries.  To limit the number of traps
and variables, OSPF should generate at most one trap per OSPF
event.  Only the variables associated with the first unusual
condition should be included with the trap.  Similarly, if
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parsing the packet, only the first event will generate a trap.

6.6.  Polling Event Counters

Many of the tables in the OSPF MIB contain generalized event
counters.  By enabling the traps defined in this document a
network manager can obtain more specific information about
these events.  A network manager may want to poll these event
counters and enable specific OSPF traps when a particular
counter starts increasing abnormally.

The following table shows the relationship between the event
counters defined in the OSPF MIB and the trap types defined in
section A.4.0



           Counter32                   Trap Type
    -----------------------   ------------------------
    ospfOriginateNewLsas       ospfOriginateLsa
    ospfIfEvents               ospfIfStateChange
                               ospfConfigError
                               ospfIfAuthFailure
                               ospfRxBadPacket
                               ospfTxRetransmit
    ospfVirtIfEvents           ospfVirtIfStateChange
                               ospfVirtIfConfigError
                               ospfVirtIfAuthFailure
                               ospfVirtIfRxBadPacket
                               ospfVirtIfTxRetransmit
    ospfNbrEvents              ospfNbrStateChange
    ospfVirtNbrEvents          ospfVirtNbrStateChange
    ospfExternLSACount         ospfLsdbApproachingOverflow
    ospfExternLSACount         ospfLsdbOverflow




7.  OSPF Trap Definitions











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OSPF-TRAP-MIB DEFINITIONS ::= BEGIN

    IMPORTS
            MODULE-IDENTITY, OBJECT-TYPE, NOTIFICATION-TYPE, IpAddress
                FROM SNMPv2-SMI
            MODULE-COMPLIANCE, OBJECT-GROUP
                FROM SNMPv2-CONF
            ospfRouterId, ospfIfIpAddress, ospfAddressLessIf, ospfIfState,
            ospfVirtIfAreaId, ospfVirtIfNeighbor, ospfVirtIfState,
            ospfNbrIpAddr, ospfNbrAddressLessIndex, ospfNbrRtrId,
            ospfNbrState, ospfVirtNbrArea, ospfVirtNbrRtrId, ospfVirtNbrState,
            ospfLsdbType, ospfLsdbLsid, ospfLsdbRouterId, ospfLsdbAreaId,
            ospfExtLsdbLimit, ospf
                FROM OSPF-MIB;

    ospfTrap MODULE-IDENTITY
                           LAST-UPDATED "9402091913Z" -- Mon Jan  9 14:20:53 PST 1995
                           ORGANIZATION "IETF OSPF Working Group"
                           CONTACT-INFO
           "                      Fred Baker
           Postal:                Advanced Computer Communications
                                  315 Bollay Drive
                                  Santa Barbara, California 93117
           Tel:                   +1 085 685 4455
           E-Mail:                fbaker@acc.com

                                  Rob Coltun
           Postal:                RainbowBridge Communications
           Tel:                   (301) 340-9416
           E-Mail:                rcoltun@rainbow-bridge.com"
       DESCRIPTION
          "The MIB module to describe traps for  the  OSPF
          Version 2 Protocol."
      ::= { ospf 16 }

-- Trap Support Objects

--         The following are support objects for the OSPF traps.

ospfTrapControl OBJECT IDENTIFIER ::= { ospfTrap 1 }
ospfTraps OBJECT IDENTIFIER ::= { ospfTrap 2 }









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    ospfSetTrap OBJECT-TYPE
        SYNTAX   OCTET STRING (SIZE(4))
        MAX-ACCESS   read-write
        STATUS   current
        DESCRIPTION
           "A four-octet string serving as a bit  map  for
           the trap events defined by the OSPF traps. This
           object is used to enable and  disable  specific
           OSPF   traps   where  a  1  in  the  bit  field
           represents enabled.  The right-most bit  (least
           significant) represents trap 0."
       ::= { ospfTrapControl 1 }


    ospfConfigErrorType OBJECT-TYPE
        SYNTAX   INTEGER   {
                    badVersion (1),
                    areaMismatch (2),
                    unknownNbmaNbr (3), -- Router is Dr eligible
                    unknownVirtualNbr (4),
                    authTypeMismatch(5),
                    authFailure (6),
                    netMaskMismatch (7),
                    helloIntervalMismatch (8),
                    deadIntervalMismatch (9),
                    optionMismatch (10) }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "Potential types  of  configuration  conflicts.
           Used  by the ospfConfigError and ospfConfigVir-
           tError traps."
   ::= { ospfTrapControl 2 }

















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    ospfPacketType OBJECT-TYPE
        SYNTAX   INTEGER   {
                    hello (1),
                    dbDescript (2),
                    lsReq (3),
                    lsUpdate (4),
                    lsAck (5) }
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "OSPF packet types."
   ::= { ospfTrapControl 3 }


    ospfPacketSrc OBJECT-TYPE
        SYNTAX   IpAddress
        MAX-ACCESS   read-only
        STATUS   current
        DESCRIPTION
           "The IP address of an inbound packet that  can-
           not be identified by a neighbor instance."
       ::= { ospfTrapControl 4 }




























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-- Traps





    ospfIfStateChange NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfIfIpAddress,
                    ospfAddressLessIf,
                    ospfIfState   -- The new state
                  }
        STATUS             current
        DESCRIPTION
           "An ospfIfStateChange trap signifies that there
           has been a change in the state of a non-virtual
           OSPF interface. This trap should  be  generated
           when  the interface state regresses (e.g., goes
           from Dr to Down) or progresses  to  a  terminal
           state  (i.e.,  Point-to-Point, DR Other, Dr, or
           Backup)."
   ::= { ospfTraps 16 }


    ospfVirtIfStateChange NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfVirtIfAreaId,
                    ospfVirtIfNeighbor,
                    ospfVirtIfState  -- The new state
                  }
        STATUS             current
        DESCRIPTION
           "An ospfIfStateChange trap signifies that there
           has  been a change in the state of an OSPF vir-
           tual interface.

           This trap should be generated when  the  inter-
           face  state  regresses  (e.g., goes from Point-
           to-Point to Down) or progresses to  a  terminal
           state (i.e., Point-to-Point)."
   ::= { ospfTraps 1 }







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    ospfNbrStateChange NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfNbrIpAddr,
                    ospfNbrAddressLessIndex,
                    ospfNbrRtrId,
                    ospfNbrState  -- The new state
                  }
        STATUS             current
        DESCRIPTION
           "An  ospfNbrStateChange  trap  signifies   that
           there  has been a change in the state of a non-
           virtual OSPF neighbor.   This  trap  should  be
           generated  when  the  neighbor  state regresses
           (e.g., goes from Attempt or Full  to  1-Way  or
           Down)  or progresses to a terminal state (e.g.,
           2-Way or Full).  When an  neighbor  transitions
           from  or  to Full on non-broadcast multi-access
           and broadcast networks, the trap should be gen-
           erated  by the designated router.  A designated
           router transitioning to Down will be  noted  by
           ospfIfStateChange."
   ::= { ospfTraps 2 }


    ospfVirtNbrStateChange NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfVirtNbrArea,
                    ospfVirtNbrRtrId,
                    ospfVirtNbrState  -- The new state
                  }
        STATUS             current
        DESCRIPTION
           "An ospfIfStateChange trap signifies that there
           has  been a change in the state of an OSPF vir-
           tual neighbor.  This trap should  be  generated
           when  the  neighbor state regresses (e.g., goes
           from Attempt or  Full  to  1-Way  or  Down)  or
           progresses to a terminal state (e.g., Full)."
   ::= { ospfTraps 3 }









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    ospfIfConfigError NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfIfIpAddress,
                    ospfAddressLessIf,
                    ospfPacketSrc,  -- The source IP address
                    ospfConfigErrorType, -- Type of error
                    ospfPacketType
                  }
        STATUS             current
        DESCRIPTION
           "An ospfIfConfigError  trap  signifies  that  a
           packet  has  been received on a non-virtual in-
           terface  from  a  router  whose   configuration
           parameters  conflict  with this router's confi-
           guration parameters.  Note that the  event  op-
           tionMismatch  should  cause  a  trap only if it
           prevents an adjacency from forming."
                  ::= { ospfTraps 4 }


    ospfVirtIfConfigError NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfVirtIfAreaId,
                    ospfVirtIfNeighbor,
                    ospfConfigErrorType, -- Type of error
                    ospfPacketType
                  }
        STATUS             current
        DESCRIPTION
           "An ospfConfigError trap signifies that a pack-
           et  has  been  received  on a virtual interface
           from a router  whose  configuration  parameters
           conflict   with   this  router's  configuration
           parameters.  Note that the event optionMismatch
           should  cause a trap only if it prevents an ad-
           jacency from forming."
   ::= { ospfTraps 5 }











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    ospfIfAuthFailure NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfIfIpAddress,
                    ospfAddressLessIf,
                    ospfPacketSrc,  -- The source IP address
                    ospfConfigErrorType, -- authTypeMismatch or authFailure
                    ospfPacketType
                  }
        STATUS             current
        DESCRIPTION
           "An ospfIfAuthFailure  trap  signifies  that  a
           packet  has  been received on a non-virtual in-
           terface from a router whose authentication  key
           or  authentication  type  conflicts  with  this
           router's authentication key  or  authentication
           type."
   ::= { ospfTraps 6 }


    ospfVirtIfAuthFailure NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfVirtIfAreaId,
                    ospfVirtIfNeighbor,
                    ospfConfigErrorType, -- authTypeMismatch or authFailure
                    ospfPacketType
                  }
        STATUS             current
        DESCRIPTION
           "An ospfVirtIfAuthFailure trap signifies that a
           packet has been received on a virtual interface
           from a router whose authentication key  or  au-
           thentication  type conflicts with this router's
           authentication key or authentication type."
   ::= { ospfTraps 7 }














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    ospfIfRxBadPacket NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfIfIpAddress,
                    ospfAddressLessIf,
                    ospfPacketSrc,  -- The source IP address
                    ospfPacketType
                  }
        STATUS             current
        DESCRIPTION
           "An ospfIfRxBadPacket trap  signifies  that  an
           OSPF  packet has been received on a non-virtual
           interface that cannot be parsed."
   ::= { ospfTraps 8 }


    ospfVirtIfRxBadPacket NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfVirtIfAreaId,
                    ospfVirtIfNeighbor,
                    ospfPacketType
                  }
        STATUS             current
        DESCRIPTION
           "An ospfRxBadPacket trap signifies that an OSPF
           packet has been received on a virtual interface
           that cannot be parsed."
   ::= { ospfTraps 9 }





















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    ospfTxRetransmit NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfIfIpAddress,
                    ospfAddressLessIf,
                    ospfNbrRtrId, -- Destination
                    ospfPacketType,
                    ospfLsdbType,
                    ospfLsdbLsid,
                    ospfLsdbRouterId
                  }
        STATUS             current
        DESCRIPTION
           "An ospfTxRetransmit  trap  signifies  than  an
           OSPF  packet  has  been retransmitted on a non-
           virtual interface.  All packets that may be re-
           transmitted  are associated with an LSDB entry.
           The LS type, LS ID, and Router ID are  used  to
           identify the LSDB entry."
   ::= { ospfTraps 10 }


    ospfVirtIfTxRetransmit NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfVirtIfAreaId,
                    ospfVirtIfNeighbor,
                    ospfPacketType,
                    ospfLsdbType,
                    ospfLsdbLsid,
                    ospfLsdbRouterId
                  }
        STATUS             current
        DESCRIPTION
           "An ospfTxRetransmit  trap  signifies  than  an
           OSPF packet has been retransmitted on a virtual
           interface.  All packets that may be retransmit-
           ted  are  associated with an LSDB entry. The LS
           type, LS ID, and Router ID are used to identify
           the LSDB entry."
   ::= { ospfTraps 11 }









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    ospfOriginateLsa NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfLsdbAreaId,  -- 0.0.0.0 for AS Externals
                    ospfLsdbType,
                    ospfLsdbLsid,
                    ospfLsdbRouterId
                  }
        STATUS             current
        DESCRIPTION
           "An ospfOriginateLsa trap signifies that a  new
           LSA  has  been originated by this router.  This
           trap should not be invoked for simple refreshes
           of  LSAs  (which happesn every 30 minutes), but
           instead will only be invoked  when  an  LSA  is
           (re)originated due to a topology change.  Addi-
           tionally, this trap does not include LSAs  that
           are  being  flushed  because  they have reached
           MaxAge."
   ::= { ospfTraps 12 }


    ospfMaxAgeLsa NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfLsdbAreaId,  -- 0.0.0.0 for AS Externals
                    ospfLsdbType,
                    ospfLsdbLsid,
                    ospfLsdbRouterId
                  }
        STATUS             current
        DESCRIPTION
           "An ospfMaxAgeLsa trap signifies  that  one  of
           the LSA in the router's link-state database has
           aged to MaxAge."
   ::= { ospfTraps 13 }














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    ospfLsdbOverflow NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfExtLsdbLimit
                  }
        STATUS             current
        DESCRIPTION
           "An ospfLsdbOverflow trap  signifies  that  the
           number of LSAs in the router's link-state data-
           base has exceeded ospfExtLsdbLimit."
   ::= { ospfTraps 14 }


    ospfLsdbApproachingOverflow NOTIFICATION-TYPE
        OBJECTS {
                    ospfRouterId, -- The originator of the trap
                    ospfExtLsdbLimit
                  }
        STATUS             current
        DESCRIPTION
           "An ospfLsdbApproachingOverflow trap  signifies
           that  the  number of LSAs in the router's link-
           state database has exceeded ninety  percent  of
           ospfExtLsdbLimit."
   ::= { ospfTraps 15 }

























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-- conformance information

ospfTrapConformance OBJECT IDENTIFIER ::= { ospfTrap 3 }

ospfTrapGroups      OBJECT IDENTIFIER ::= { ospfTrapConformance 1 }
ospfTrapCompliances OBJECT IDENTIFIER ::= { ospfTrapConformance 2 }

-- compliance statements

    ospfTrapCompliance MODULE-COMPLIANCE
        STATUS  current
        DESCRIPTION
           "The compliance statement "
       MODULE  -- this module
       MANDATORY-GROUPS { ospfTrapControlGroup }


        GROUP       ospfTrapControlGroup
        DESCRIPTION
           "This group is optional but recommended for all
           OSPF systems"
       ::= { ospfTrapCompliances 1 }


-- units of conformance

    ospfTrapControlGroup    OBJECT-GROUP
        OBJECTS {
                           ospfSetTrap,
                           ospfConfigErrorType,
                           ospfPacketType,
                           ospfPacketSrc
        }
        STATUS  current
        DESCRIPTION
           "These objects are required  to  control  traps
           from OSPF systems."
       ::= { ospfTrapGroups 1 }


END









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8.  Acknowledgements

This document was produced by the OSPF Working Group.















































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9.  References

[1]  V. Cerf, IAB Recommendations for the Development of
     Internet Network Management Standards.  Internet Working
     Group Request for Comments 1052.  Network Information
     Center, SRI International, Menlo Park, California,
     (April, 1988).

[2]  V. Cerf, Report of the Second Ad Hoc Network Management
     Review Group, Internet Working Group Request for Comments
     1109.  Network Information Center, SRI International,
     Menlo Park, California, (August, 1989).

[3]  M.T. Rose and K. McCloghrie, Structure and Identification
     of Management Information for TCP/IP-based internets,
     Internet Working Group Request for Comments 1155.
     Network Information Center, SRI International, Menlo
     Park, California, (May, 1990).

[4]  K. McCloghrie and M.T. Rose, Management Information Base
     for Network Management of TCP/IP-based internets,
     Internet Working Group Request for Comments 1156.
     Network Information Center, SRI International, Menlo
     Park, California, (May, 1990).

[5]  J.D. Case, M.S. Fedor, M.L. Schoffstall, and J.R. Davin,
     Simple Network Management Protocol, Internet Working
     Group Request for Comments 1157.  Network Information
     Center, SRI International, Menlo Park, California, (May,
     1990).

[6]  M.T. Rose (editor), Management Information Base for
     Network Management of TCP/IP-based internets, Internet
     Working Group Request for Comments 1213.  Network
     Information Center, SRI International, Menlo Park,
     California, (May, 1990).

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

[8]  Information processing systems - Open Systems
     Interconnection - Specification of Basic Encoding Rules





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     for Abstract Notation One (ASN.1), International
     Organization for Standardization.  International Standard
     8825, (December, 1987).

[9]  M.T. Rose, K. McCloghrie (editors), Towards Concise MIB
     Definitions, Internet Draft, Internet Engineering Task
     Force, (September, 1990).

[10] M.T. Rose (editor), A Convention for Defining Traps for
     use with the SNMP, Internet Working Group Request for
     Comments 1215.  Network Information Center, SRI
     International, Menlo Park, California, (March, 1991).

[11] L. Steinberg, Techniques for Managing Asynchronously
     Generated Alerts.  Internet Working Group Request for
     Comments 1224.  Network Information Center, SRI
     International, Menlo Park, California, (May, 1991).

[12] J. Moy, Multicast Extensions to OSPF, Internet Draft,
     Proteon, Inc., (September, 1993).






























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Table of Contents


1 Status of this Memo ...................................    1
2 Abstract ..............................................    2
3 The SNMPv2 Network Management Framework ...............    3
3.1 Object Definitions ..................................    3
4 Overview ..............................................    3
4.1 Changes from RFC 1253 ...............................    3
4.2 Textual Conventions .................................    7
4.3 Structure of MIB ....................................    7
4.3.1 General Variables .................................    7
4.3.2 Area Data Structure and Area Stub Metric Table ....    8
4.3.3 Link State Database and External Link State  Da-
     tabase .............................................    8
4.3.4 Address Table and Host Tables .....................    8
4.3.5 Interface and Interface Metric Tables .............    8
4.3.6 Virtual Interface Table ...........................    8
4.3.7 Neighbor and Virtual Neighbor Tables ..............    8
4.4 Conceptual Row Creation .............................    8
4.5 Default Configuration ...............................    9
5 Definitions ...........................................   12
5.1 OSPF General Variables ..............................   15
5.2 OSPF Area Table .....................................   22
5.3 OSPF Area Default Metrics ...........................   27
5.4 OSPF Link State Database ............................   30
5.5 OSPF Address Range Table ............................   35
5.6 OSPF Host Table .....................................   38
5.7 OSPF Interface Table ................................   41
5.8 OSPF Interface Metrics ..............................   51
5.9 OSPF Virtual Interface Table ........................   55
5.10 OSPF Neighbor Table ................................   61
5.11 OSPF Virtual Neighbor Table ........................   67
5.12 OSPF External Link State Database ..................   71
5.13 OSPF Route Table Use ...............................   76
5.14 OSPF Area Aggregate Table ..........................   77
6 OSPF Traps ............................................   89
6.1 Format Of Trap Definitions ..........................   89
6.2 Approach ............................................   89
6.3 Ignoring Initial Activity ...........................   89
6.4 Throttling Traps ....................................   90
6.5 One Trap Per OSPF Event .............................   90
6.6 Polling Event Counters ..............................   91
7 OSPF Trap Definitions .................................   91
7.1 Trap Support Objects ................................   91





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7.2 Traps ...............................................   94
8 Acknowledgements ......................................  104
9 References ............................................  105















































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