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 56 lists the show ipv6 mroute command output fields.

Table 56: 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

Related Documentation