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    Monitoring Multicast Statistics

    Purpose

    Display statistics for packets received through multicast routes that the router has added to the multicast routing table and established on the appropriate line modules.

    • You can specify a multicast group IP address or both a multicast group IP address and a multicast source IP address to display information about a particular multicast forwarding entry.
    • You can use the active option to display information for the active multicast routes.
    • You can specify the bandwidth threshold along with the active option to display information for the active multicast routes with admission bandwidth greater than the specified bandwidth threshold. The default bandwidth threshold is 4000 bps.

    Action

    To display statistics of the multicast routes added to the multicast routing table:

    host1#show ip mroute statistics 
    IP Multicast Routing Table
    (S, G) uptime d h:m:s[, expires d h:m:s]
      [Admission bandwidth: bps]
      [QoS bandwidth: bps]
      RPF route: addr/mask, incoming interface
                 neighbor address, owner route-owner
      Incoming interface list:
          Interface (addr/mask), State/Owner [(RPF IIF)]
      Outgoing interface list:
          Interface (addr/mask), State/Owner, Uptime/Expires
    (10.0.1.9, 225.1.1.1) uptime 0 00:00:23
      Admission bandwidth: 2000000 bps
      QoS bandwidth: 2000000 bps
      RPF route: 10.0.0.0/8, incoming interface ATM2/1.200
                 neighbor 21.1.1.1, owner Netmgmt
      Incoming interface list:
          ATM2/1.200 (21.2.2.2/8), Accept/Pim (RPF IIF)
      Outgoing interface list:
          ATM2/1.300 (31.2.2.2/8), Blocked (port-adm-limit)/Pim, 0 00:00:23/never
      Statistics:
          Received   : 23 pkts, 1472 bytes
          Forwarded  : 0 pkts, 0 bytes
          Rcvd on OIF: 0 pkts
    Counts: 1 (S, G) entries
            0 (*, G) entries

    Meaning

    Table 1 lists the show ip mroute statistics command output fields.

    Table 1: show ip mroute statistics Output Fields

    Field Name

    Field Description

    (S,G)

    IP addresses of the multicast source and the multicast group

    Uptime

    Length of time that the (S,G) pair has been active, in days hours:minutes:seconds format

    Expires

    Length of time for which the (S,G) pair will be active, in days hours:minutes:seconds format

    Admission bandwidth

    Admission bandwidth (in bps)

    QoS bandwidth

    QoS bandwidth (in bps)

    RPF Route

    IP address and subnetwork mask of the RPF route

    Incoming interface

    Type and specifier of the incoming interface for the RPF route

    neighbor address

    IP address of the neighbor

    owner

    Owner of the route:

    • Local—Route belonging to the local interface
    • Static—Static route
    • Other protocols—Route established by a protocol such as RIP or OSPF

    Incoming interface list

    List of incoming interfaces on the router. Details include:

    • Type of interface and its specifier
    • Action that the interface takes with packets: Accept or Discard
    • Multicast protocol that owns the interface

    Outgoing interface list

    List of outgoing interfaces on the router. Details include:

    • Type of interface and its specifier
    • Action that the interface takes with packets: Forward or Blocked (intf-adm-limit, join-intf-adm-limit, port-adm-limit, port-limit, port-priority-adm-limit)
    • Protocol running on the interface: PIM, DVMRP, or IGMP
    • Amount of time that the interface has been active in this multicast forwarding entry, in days hours:minutes:seconds format
    • Length of time that the interface can remain active in this multicast forwarding entry, in days hours:minutes:seconds format or never

    Statistics

    • Received—Number of packets and bytes that the virtual router received for this multicast route
    • Forwarded—Number of packets and statistics that the virtual router has forwarded for this multicast route
    • Rcvd on OIF—Number of packets and statistics that the virtual router has received on the OIF for this multicast route

    Note: The output shows statistics after the virtual router has added the multicast route to the multicast routing table and established the route on the appropriate line module. Statistics for interactions before the route is established on the line module are not displayed.

    Counts

    Numbers of types of (S,G) mappings:

    • (S,G)—Number of (S,G) entries
    • (*,G)—Number of (*,G) entries

    Published: 2014-08-20