IP Routing: OSPF Configuration Guide, Cisco IOS Release 15M&T
OSPF MIB Support of RFC 1850 and Latest Extensions
Downloads: This chapterpdf (PDF - 1.35MB) The complete bookPDF (PDF - 5.36MB) | The complete bookePub (ePub - 1.13MB) | The complete bookePub (ePub - 1.08MB) | Feedback

OSPF MIB Support of RFC 1850 and Latest Extensions

Contents

OSPF MIB Support of RFC 1850 and Latest Extensions

The OSPF MIB Support of RFC 1850 and Latest Extensions feature introduces the capability for Simple Network Management Protocol (SNMP) monitoring on the Open Shortest Path First (OSPF) routing protocol. Users have an improved ability to constantly monitor the changing state of an OSPF network by use of MIB objects to gather information relating to protocol parameters and trap notification objects that can signal the occurrence of significant network events such as transition state changes. The protocol information collected by the OSPF MIB objects and trap objects can be used to derive statistics that will help monitor and improve overall network performance.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for OSPF MIB Support of RFC 1850 and Latest Extensions

  • OSPF must be configured on the router.
  • Simple Network Management Protocol (SNMP) must be enabled on the router before notifications (traps) can be configured or before SNMP GET operations can be performed.

Restrictions for OSPF MIB Support of RFC 1850 and Latest Extensions

For routers that are running Cisco IOS Release 12.0(26)S, 12.2(25)S, 12.2(27)SBC, 12.2(31)SB2 and later releases, the OSPF MIB and CISCO OSPF MIB will be supported only for the first OSPF process (except for MIB objects that are related to virtual links and sham links, and in cases where support for multiple topologies is provided). SNMP traps will be generated for OSPF events that are related to any of the OSPF processes. There is no workaround for this situation.

Information About OSPF MIB Support of RFC 1850 and Latest Extensions

The following sections contain information about MIB objects standardized as part of RFC 1850 and defined in OSPF-MIB and OSPF-TRAP-MIB. In addition, extensions to RFC 1850 objects are described as defined in the two Cisco private MIBs, CISCO-OSPF-MIB and CISCO-OSPF-TRAP-MIB.

OSPF MIB Changes to Support RFC 1850

OSPF MIB

This section describes the new MIB objects that are provided by RFC 1850 definitions. These OSPF MIB definitions provide additional capacity that is not provided by the standard OSPF MIB that supported the previous RFC 1253. To see a complete set of OSPF MIB objects, see the OSPF-MIB file.

The table below shows the new OSPF-MIB objects that are provided by RFC 1850 definitions. The objects are listed in the order in which they appear within the OSPF-MIB file, per the tables that describe them.

Table 1 New OSPF-MIB Objects

OSPF-MIB Table

New MIB Objects

OspfAreaEntry table

  • OspfAreaSummary
  • OspfAreaStatus

OspfStubAreaEntry

  • OspfStubMetricType

OspfAreaRangeEntry

  • OspfAreaRangeEffect

OspfHostEntry

  • OspfHostAreaID

OspfIfEntry

  • OspfIfStatus
  • OspfIfMulticastForwarding
  • OspfIfDemand
  • OspfIfAuthType

OspfVirtIfEntry

  • OspfVirtIfAuthType

OspfNbrEntry

  • OspfNbmaNbrPermanence
  • OspfNbrHelloSuppressed

OspfVirtNbrEntry

  • OspfVirtNbrHelloSuppressed

OspfExtLsdbEntry

  • OspfExtLsdbType
  • OspfExtLsdbLsid
  • OspfExtLsdbRouterId
  • OspfExtLsdbSequence
  • OspfExtLsdbAge
  • OspfExtLsdbChecksum
  • OspfExtLsdbAdvertisement

OspfAreaAggregateEntry

  • OspfAreaAggregateAreaID
  • OspfAreaAggregateLsdbType
  • OspfAreaAggregateNet
  • OspfAreaAggregateMask
  • OspfAreaAggregateStatusospfSetTrap
  • OspfAreaAggregateEffect

OSPF TRAP MIB

This section describes scalar objects and MIB objects that are provided to support FRC 1850.

The following scalar objects are added to OSPF-TRAP-MIB and are listed in the order in which they appear in the OSPF-TRAP-MIB file:

  • OspfExtLsdbLimit
  • OspfMulticastExtensions
  • OspfExitOverflowInterval
  • OspfDemandExtensions

The ospfSetTrap control MIB object contains the OSPF trap MIB objects that enable and disable OSPF traps in the IOS CLI. These OSPF trap MIB objects are provided by the RFC 1850 standard OSPF MIB. To learn how to enable and disable the OSPF traps, see the How to Enable OSPF MIB Support of RFC 1850 and Latest Extensions.

The table below shows the OSPF trap MIB objects, listed in the order in which they appear within the OSPF-TRAP-MIB file.

Table 2 New OSPF-TRAP-MIB Objects

OSPF Control MIB Object

Trap MIB Objects

ospfSetTrap

  • ospfIfStateChange
  • ospfVirtIfStateChange
  • ospfNbrStateChange
  • ospfVirtNbrState
  • ospfIfConfigError
  • ospfVirtIfConfigError
  • ospfIfAuthFailure
  • ospfVirtIfAuthFailure
  • ospfIfRxBadPacket
  • ospfVirtIfRxBadPacket
  • ospfTxRetransmit
  • ospfVirtIfTxRetransmit
  • ospfOriginateLsa
  • ospfMaxAgeLsa

CISCO OSPF MIB

This section describes scalar and Cisco-specific OSPF MIB objects that are provided as extensions to support the RFC 1850 OSPF MIB definitions, to provide capability that the standard MIB cannot provide.

The following scalar objects are added to CISCO-OSPF-MIB:

  • cospfRFC1583Compatibility
  • cospfOpaqueLsaSupport
  • cospfOpaqueASLsaCount
  • cospfOpaqueASLsaCksumSum

For each of the following table entries, the new Cisco-specific MIB objects that are provided as extensions to support the RFC 1850 OSPF MIB definitions are listed. To see the complete set of objects for the Cisco-specific OSPF MIB, refer to the CISCO-OSPF-MIB file.

The table below shows the new CISCO-OSPF-MIB objects that are provided by RFC 1850 definitions. The objects are listed in the order in which they appear within the CISCO-OSPF-MIB file, per the tables that describe them.

Table 3 New CISCO-OSPF-MIB Objects

CISCO-OSPF-MIB Table

New MIB Objects

cospfAreaEntry

  • cospfOpaqueAreaLsaCount
  • cospfOpaqueAreaLsaCksumSum
  • cospfAreaNssaTranslatorRole
  • cospfAreaNssaTranslatorState
  • cospfAreaNssaTranslatorEvents

cospfLsdbEntry

  • cospfLsdbType
  • cospfLsdbSequence
  • cospfLsdbAge
  • cospfLsdbChecksum
  • cospfLsdbAdvertisement

cospfIfEntry

  • cospfIfLsaCount
  • cospfIfLsaCksumSum

cospfVirtIfEntry

  • cospfVirtIfLsaCount
  • cospfVirtIfLsaCksumSum

cospfLocalLsdbEntry

  • cospfLocalLsdbIpAddress
  • cospfLocalLsdbAddressLessIf
  • cospfLocalLsdbType
  • cospfLocalLsdbLsid
  • cospfLocalLsdbRouterId
  • cospfLocalLsdbSequence
  • cospfLocalLsdbAge
  • cospfLocalLsdbChecksum
  • cospfLocalLsdbAdvertisement

cospfVirtLocalLsdbEntry

  • cospfVirtLocalLsdbTransitArea
  • cospfVirtLocalLsdbNeighbor
  • cospfVirtLocalLsdbType
  • cospfVirtLocalLsdbLsid
  • cospfVirtLocalLsdbRouterId
  • cospfVirtLocalLsdbSequence
  • cospfVirtLocalLsdbAge
  • cospfVirtLocalLsdbChecksum
  • cospfVirtLocalLsdbAdvertisement

CISCO OSPF TRAP MIB

The cospfSetTrapMIB object represents trap events in CISCO-OSPF-TRAP-MIB. This is a bit map, where the first bit represents the first trap. The following MIB objects are TRAP events that have been added to support RFC 1850. To see a complete set of Cisco OSPF Trap MIB objects, see the CISCO-OSPF-TRAP-MIB file.

The table below shows the trap events described within the cospfSetTrap MIB object in the CISCO-OSPF-TRAP-MIB:

Table 4 CISCO-OSPF Trap Events

CISCO-OSPF-TRAP-MIB Trap Events

Trap Event Description

cospfIfConfigError

This trap is generated for mismatched MTU parameter errors that occur when nonvirtual OSPF neighbors are forming adjacencies.

cospfVirtIfConfigError

This trapis generated for mismatched MTU parameter errors when virtual OSPF neighbors are forming adjacencies.

cospfTxRetransmit

This trapis generated in the case of opaque LSAs when packets are sent by a nonvirtual interface. An opaque link-state advertisement (LSA) is used in MPLS traffic engineering to distribute attributes such as capacity and topology of links in a network. The scope of this LSA can be confined to the local network (Type 9, Link-Local), OSPF area (Type 20, Area-Local), or autonomous system (Type 11, AS scope). The information in an opaque LSA can be used by an external application across the OSPF network.

cospfVirtIfTxRetransmit

This trapis generated in the case of opaque LSAs when packets are sent by a virtual interface.

cospfOriginateLsa

This trapis generated when a new opaque LSA is originated by the router when a topology change has occurred.

cospfMaxAgeLsa

The trapis generated in the case of opaque LSAs.

cospfNssaTranslatorStatusChange

The trap is generated if there is a change in the ability of a router to translate OSPF type-7 LSAs into OSPF type-5 LSAs.

For information about how to enable OSPF MIB traps, see the How to Enable OSPF MIB Support of RFC 1850 and Latest Extensions.

Benefits of the OSPF MIB

The OSPF MIBs (OSPF-MIB and OSPF-TRAP-MIB) and Cisco private OSPF MIBs (CISCO-OSPF-MIB and CISCO-OSPF-TRAP-MIB) allow network managers to more effectively monitor the OSPF routing protocol through the addition of new table objects and trap notification objects that previously were not supported by the RFC 1253 OSPF MIB.

New CLI commands have been added to enable SNMP notifications for OSPF MIB support objects, Cisco-specific errors, retransmission and state-change traps. The SNMP notifications are provided for errors and other significant event information for the OSPF network.

How to Enable OSPF MIB Support of RFC 1850 and Latest Extensions

Enabling OSPF MIB Support

Before You Begin

Before the OSPF MIB Support of RFC 1850 and Latest Extensions feature can be used, the SNMP server for the router must be configured.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    snmp-server community string1 ro

    4.    snmp-server community string2 rw

    5.    snmp-server host {hostname | ip-address} [vrf vrf-name] [traps | informs] [version {1 | 2c | 3 [auth | noauth | priv]}] community-string [udp-port port] [notification-type]

    6.    snmp-server enable traps ospf

    7.    end


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Router> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.
     
    Step 2 configure terminal


    Example:
    Router# configure terminal
     

    Enters global configuration mode.

     
    Step 3 snmp-server community string1 ro


    Example:
    Router(config)# snmp-server community public ro
     

    Enables read access to all objects in the MIB, but does not allow access to the community strings.

     
    Step 4 snmp-server community string2 rw


    Example:
    Router(config)# snmp-server community private rw
     

    Enables read and write access to all objects in the MIB, but does not allow access to the community strings.

     
    Step 5 snmp-server host {hostname | ip-address} [vrf vrf-name] [traps | informs] [version {1 | 2c | 3 [auth | noauth | priv]}] community-string [udp-port port] [notification-type]


    Example:
    Router(config)# snmp-server host 172.20.2.162 version 2c public ospf
     

    Specifies a recipient (target host) for SNMP notification operations.

    • If no notification-type is specified, all enabled notifications (traps or informs) will be sent to the specified host.
    • If you want to send only the OSPF notifications to the specified host, you can use the optional ospfkeyword as one of the notification-types. (See the example.) Entering the ospf keyword enables the ospfSetTrap trap control MIB object.
     
    Step 6 snmp-server enable traps ospf


    Example:
    Router(config)# snmp-server enable traps ospf
     

    Enables all SNMP notifications defined in the OSPF MIBs.

    Note   

    This step is required only if you wish to enable all OSPF traps. When you enter the no snmp-server enable traps ospf command, all OSPF traps will be disabled.

     
    Step 7 end


    Example:
    Router(config)# end
     

    Ends your configuration session and exits global configuration mode.

     

    What to Do Next

    If you did not want to enable all OSPF traps, follow the steps in the following section to selectively enable one or more type of OSPF trap:

    Enabling Specific OSPF Traps

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    snmp-server enable traps ospf cisco-specific errors [config-error] [virt-config-error]

      4.    snmp-server enable traps ospf cisco-specific retransmit [packets] [virt-packets]

      5.    snmp-server enable traps ospf cisco-specific state-change [nssa-trans-change] [shamlink-state-change]

      6.    snmp-server enable traps ospf cisco-specific lsa [lsa-maxage] [lsa-originate]

      7.    snmp-server enable traps ospf errors [authentication-failure] [bad-packet] [config-error] [virt-authentication-failure] [virt-config-error]

      8.    snmp-server enable traps ospf lsa [lsa-maxage] [lsa-originate]

      9.    snmp-server enable traps ospf rate-limit seconds trap-number

      10.    snmp-server enable traps ospf retransmit [packets] [virt-packets]

      11.    snmp-server enable traps ospf state-change [if-state-change] [neighbor-state-change] [virtif-state-change] [virtneighbor-state-change]


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 enable


      Example:
      Router> enable
       

      Enables privileged EXEC mode.

      • Enter your password if prompted.
       
      Step 2 configure terminal


      Example:
      Router# configure terminal
       

      Enters global configuration mode.

       
      Step 3 snmp-server enable traps ospf cisco-specific errors [config-error] [virt-config-error]


      Example:
      Router(config)# snmp-server enable traps ospf cisco-specific errors config-error
       

      Enables SNMP notifications for Cisco-specific OSPF configuration mismatch errors.

      • Entering the snmp-server enable traps ospf cisco-specific errors command with the optional virt-config-error keyword enables only the SNMP notifications for configuration mismatch errors on virtual interfaces.
       
      Step 4 snmp-server enable traps ospf cisco-specific retransmit [packets] [virt-packets]


      Example:
      Router(config)# snmp-server enable traps ospf cisco-specific retransmit packets virt-packets
       

      Enables error traps for Cisco-specific OSPF errors that involve re-sent packets.

      • Entering the snmp-server enable traps ospf cisco-specific retransmit command with the optional virt-packetskeyword enables only the SNMP notifications for packets that are re-sent on virtual interfaces.
       
      Step 5 snmp-server enable traps ospf cisco-specific state-change [nssa-trans-change] [shamlink-state-change]


      Example:
      Router(config)# snmp-server enable traps ospf cisco-specific state-change
       

      Enables all error traps for Cisco-specific OSPF transition state changes.

       
      Step 6 snmp-server enable traps ospf cisco-specific lsa [lsa-maxage] [lsa-originate]


      Example:
      Router(config)# snmp-server enable traps ospf cisco-specific lsa
       

      Enables error traps for opaque LSAs.

       
      Step 7 snmp-server enable traps ospf errors [authentication-failure] [bad-packet] [config-error] [virt-authentication-failure] [virt-config-error]


      Example:
      Router(config)# snmp-server enable traps ospf errors virt-config-error
       

      Enables error traps for OSPF configuration errors.

      • Entering the snmp-server enable traps ospf errors command with the optional virt-config-errorkeyword enables only the SNMP notifications for OSPF configuration errors on virtual interfaces.
       
      Step 8 snmp-server enable traps ospf lsa [lsa-maxage] [lsa-originate]


      Example:
      Router(config)# snmp-server enable traps ospf lsa
       

      Enables error traps for OSPF LSA errors.

       
      Step 9 snmp-server enable traps ospf rate-limit seconds trap-number


      Example:
      Router(config)# snmp-server enable traps ospf rate-limit 20 20
       

      Sets the rate limit for how many SNMP OSPF notifications are sent in each OSPF SNMP notification rate-limit window.

       
      Step 10 snmp-server enable traps ospf retransmit [packets] [virt-packets]


      Example:
      Router(config)# snmp-server enable traps ospf retransmit
       

      Enables SNMP OSPF notifications for re-sent packets.

       
      Step 11 snmp-server enable traps ospf state-change [if-state-change] [neighbor-state-change] [virtif-state-change] [virtneighbor-state-change]


      Example:
      Router(config)# snmp-server enable traps ospf state-change
       

      Enables SNMP OSPF notifications for OSPF transition state changes.

       

      Verifying OSPF MIB Traps on the Router

      SUMMARY STEPS

        1.    enable

        2.    show running-config [options]


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 enable


        Example:
        Router> enable
         

        Enables privileged EXEC mode.

        • Enter your password if prompted.
         
        Step 2 show running-config [options]


        Example:
        Router# show running-config | include traps 
         

        Displays the contents of the currently running configuration file and includes information about enabled traps.

        • Verifies which traps are enabled.
         

        Configuration Examples for OSPF MIB Support of RFC 1850 and Latest Extensions

        Example Enabling and Verifying OSPF MIB Support Traps

        The following example enables all OSPF traps.

        Router# configure terminal
        Enter configuration commands, one per line.  End with CNTL/Z.
        Router(config)# snmp-server enable traps ospf
        Router(config)# end
        

        The show running-config command is entered to verify that the traps are enabled:

        Router# show running-config | include traps
        snmp-server enable traps ospf

        Where to Go Next

        For more information about SNMP and SNMP operations, see the "Configuring SNMP Support" chapter of the Cisco IOS Configuration Fundamentals and Network Management Configuration Guide, Release 12.2.

        Additional References

        The following sections provide references related to the OSPF MIB Support of RFC 1850 and Latest Extensions feature.

        Related Documents

        Related Topic

        Document Title

        SNMP commands

        Cisco IOS Configuration Fundamentals and Network Management Command Reference

        Standards

        Standard

        Title

        No new or modified standards are supported by this feature, and support for existing standards has not been modified by this feature.

        --

        MIB

        MIB

        MIBs Link

        • CISCO-OSPF-MIB
        • CISCO-OSPF-TRAP-MIB
        • OSPF-MIB
        • OSPF-TRAP-MIB

        To locate and download MIBs for selected platforms, Cisco IOS releases, and feature sets, use Cisco MIB Locator found at the following URL:

        http:/​/​www.cisco.com/​go/​mibs

        RFC

        RFC

        Title

        RFC 1850

        OSPF MIB Support

        Technical Assistance

        Description

        Link

        The Cisco Support and Documentation website provides online resources to download documentation, software, and tools. Use these resources to install and configure the software and to troubleshoot and resolve technical issues with Cisco products and technologies. Access to most tools on the Cisco Support and Documentation website requires a Cisco.com user ID and password.

        http:/​/​www.cisco.com/​cisco/​web/​support/​index.html

        Feature Information for OSPF MIB Support of RFC 1850 and Latest Extensions

        The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

        Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

        Table 5 Feature Information for OSPF MIB Support of RFC 1850 and Latest Extensions

        Feature Name

        Releases

        Feature Information

        OSPF MIB Support of RFC 1850 and Latest Extensions

        12.0(26)S 12.3(4)T 12.2(25)S 12.2(27)SBC 12.2(31)SB2

        OSPF MIB Support of RFC 1850 and Latest Extensions feature introduces the capability for Simple Network Management Protocol (SNMP) monitoring on the Open Shortest Path First (OSPF) routing protocol. Users have an improved ability to constantly monitor the changing state of an OSPF network by use of MIB objects to gather information relating to protocol parameters and trap notification objects that can signal the occurrence of significant network events such as transition state changes. The protocol information collected by the OSPF MIB objects and trap objects can be used to derive statistics that will help monitor and improve overall network performance.