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    Monitoring IPv6 Multicast Forwarding Entries

    Purpose

    Displays information about all or specified multicast forwarding entries. You can specify a multicast group IPv6 address or both a multicast group IPv6 address and a multicast source IPv6 address to display information about particular multicast forwarding entries.

    Action

    To display all multicast forwarding entries while bandwidth rate is constant:

    host1#show ipv6 mroute
    IPv6 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
    (10:0:0:1:1::, ff0e::1) uptime 0 01:04:12
      RPF route: 10:0:0:1::/64, incoming interface ATM2/3.1001
                 neighbor 10:0:0:1::1, owner Local
      Incoming interface list:
          ATM2/3.1001 (10:0:0:1::1/64), Accept/Pim (RPF IIF)
      Outgoing interface list:
          ATM2/0.200 (21:2:2:21::2:1/60), Forward/Pim, 0 01:04:12/never
    (10:0:0:1:2::, ff0e::1) uptime 0 01:04:12
      RPF route: 10:0:0:1::/64, incoming interface ATM2/3.1001
                 neighbor 10:0:0:1::1, owner Local
      Incoming interface list:
          ATM2/3.1001 (10:0:0:1::1/64), Accept/Pim (RPF IIF)
      Outgoing interface list:
          ATM2/0.200 (21:2:2:21::2:1/60), Forward/Pim, 0 01:04:12/never
    Counts: 2 (S, G) entries
            0 (*, G) entries

    To display all multicast forwarding entries when bandwidth limit of all the join interfaces exceeds configured CAC limits:

    host1#show ipv6 mroute
    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
    (10:0:0:1:1::, ff0e::1) uptime 0 01:04:12
      RPF route: 10:0:0:1::/64, incoming interface ATM2/3.1001
                 neighbor 10:0:0:1::1, owner Local
      Incoming interface list:
          ATM2/3.1001 (10:0:0:1::1/64), Accept/Pim (RPF IIF)
      Outgoing interface list:
          ATM2/0.200 (21:2:2:21::2:1/60), Forward/Pim, 0 01:04:12/never
    (10:0:0:1:2::, ff0e::1) uptime 0 01:04:12
      RPF route: 10:0:0:1::/64, incoming interface ATM2/3.1001
                 neighbor 10:0:0:1::1, owner Local
      Incoming interface list:
          ATM2/3.1001 (10:0:0:1::1/64), Accept/Pim (RPF IIF)
      Outgoing interface list:
          ATM2/0.200 (21:2:2:21::2:1/60), Blocked (join-intf-adm-limit)/IGMP, 0 01:04:12/never
    Counts: 2 (S, G) entries
            0 (*, G) entries

    Meaning

    Table 1 lists the show ipv6 mroute command output fields.

    Table 1: show ipv6 mroute Output Fields

    Field Name

    Field Description

    (S,G)

    IPv6 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

    IPv6 address and prefix of the RPF route

    Incoming interface

    Type and specifier of the incoming interface for the RPF route

    neighbor address

    IPv6 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

    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
    • Time that the interface has been active in this multicast forwarding entry, in days hours:minutes:seconds format
    • Time that the interface will cease to be active in this multicast forwarding entry, in days hours:minutes:seconds format

    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-limit)
    • Protocol running on the interface: PIM or MLD
    • Time that the interface has been active in this multicast forwarding entry, in days hours:minutes:seconds format
    • Time that the interface will cease to be active in this multicast forwarding entry, in days hours:minutes:seconds format

    Counts

    Numbers of types of source group mappings:

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

    Published: 2014-08-20