Configuring PIM MIB Extension for IP Multicast

Information About PIM MIB Extension for IP Multicast

PIM MIB Extensions for SNMP Traps for IP Multicast

Protocol Independent Multicast (PIM) is an IP multicast routing protocol used for routing multicast data packets to multicast groups. RFC 2934 defines the PIM MIB for IPv4, which describes managed objects that enable users to remotely monitor and configure PIM using Simple Network Management Protocol (SNMP).

PIM MIB extensions introduce the following new classes of PIM notifications:

  • neighbor-change--This notification results from the following conditions:
    • A router’s PIM interface is disabled or enabled (using the ip pim command in interface configuration mode)
    • A router's PIM neighbor adjacency expires (defined in RFC 2934)

  • rp-mapping-change--This notification results from a change in the rendezvous point (RP) mapping information due to either Auto-RP messages or bootstrap router (BSR) messages.

  • invalid-pim-message--This notification results from the following conditions:
    • An invalid (*, G) Join or Prune message is received by the device (for example, when a router receives a Join or Prune message for which the RP specified in the packet is not the RP for the multicast group)
    • An invalid PIM register message is received by the device (for example, when a router receives a register message from a multicast group for which it is not the RP)

Benefits of PIM MIB Extensions

PIM MIB extensions:

  • Allow users to identify changes in the multicast topology of their network by detecting changes in the RP mapping.

  • Provide traps to monitor the PIM protocol on PIM-enabled interfaces.

  • Help users identify routing issues when multicast neighbor adjacencies expire on a multicast interface.

  • Enable users to monitor RP configuration errors (for example, errors due to flapping in dynamic RP allocation protocols like Auto-RP).

How to Configure PIM MIB Extension for IP Multicast

Enabling PIM MIB Extensions for IP Multicast

Perform this task to enable PIM MIB extensions for IP multicast.


Note
  • The pimInterfaceVersion object was removed from RFC 2934 and, therefore, is no longer supported in software.
  • The following MIB tables are not supported in Cisco software:
    • pimIpMRouteTable
    • pimIpMRouteNextHopTable
Procedure
     Command or ActionPurpose
    Step 1 enable


    Example:
    Device> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.

     
    Step 2 configure terminal


    Example:
    Device# configure terminal
     

    Enters global configuration mode.

     
    Step 3 snmp-server enable traps pim [neighbor-change | rp-mapping-change | invalid-pim-message]


    Example:
    Device(config)# snmp-server enable traps pim neighbor-change
     

    Enables a device to send PIM notifications.

    • neighbor-change --This keyword enables notifications indicating when a device’s PIM interface is disabled or enabled, or when a device’s PIM neighbor adjacency expires.

    • rp-mapping-change --This keyword enables notifications indicating a change in RP mapping information due to either Auto-RP messages or BSR messages.

    • invalid-pim-message --This keyword enables notifications for monitoring invalid PIM protocol operations (for example, when a device receives a join or prune message for which the RP specified in the packet is not the RP for the multicast group or when a device receives a register message from a multicast group for which it is not the RP).

     
    Step 4 snmp-server host host-address [traps | informs] community-string pim


    Example:
    Device(config)# snmp-server host 10.10.10.10 traps public pim
     

    Specifies the recipient of a PIM SNMP notification operation.

     

    Configuration Examples for PIM MIB Extensions

    Example Enabling PIM MIB Extensions for IP Multicast

    The following example shows how to configure a router to generate notifications indicating that a PIM interface of the router has been enabled. The first line configures PIM traps to be sent as SNMP v2c traps to the host with IP address 10.0.0.1. The second line configures the router to send the neighbor-change class of trap notification to the host.

    snmp-server host 10.0.0.1 traps version 2c public pim 
snmp-server enable traps pim neighbor-change 
interface ethernet0/0 
 ip pim sparse-mode

    Additional References for PIM MIB Extension for IP Multicast

    Related Documents

    Related Topic

    Document Title

    Cisco IOS commands

    Cisco IOS Master Commands List, All Releases

    Standards and RFCs

    Standard/RFC

    Title

    draft-kouvelas-pim-bidir-new-00.txt

    A New Proposal for Bi-directional PIM

    RFC 1112

    Host Extensions for IP Multicasting

    RFC 1918

    Address Allocation for Private Internets

    RFC 2770

    GLOP Addressing in 233/​8

    RFC 3569

    An Overview of Source-Specific Multicast (SSM)

    MIBs

    MIB

    MIBs Link

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

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

    http:/​/​www.cisco.com/​go/​mibs

    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 History and Information for PIM MIB Extension

    Release

    Modification

    Cisco IOS XE 3.3SECisco IOS XE 3.3SE

    This feature was introduced.