Monitoring Active Multicast Routes

Purpose

Display active multicast routes.

Action

To display the active multicast routes with bandwidth above 10000 bps:

host1#show ip mroute active 10000
              Active IP Multicast Routes >=10000 bps
(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
(52.0.0.1, 232.0.0.1) uptime 0 00:01:07
  Admission bandwidth: 47000 bps (adaptive)
  QoS bandwidth: 47000 bps (adaptive)
  RPF route: 52.0.0.0/24, incoming interface ATM2/1.17
      neighbor 17.0.0.2, owner NetmgmtRpf
  Incoming interface list:
      ATM2/1.17 (17.0.0.2/24), Accept/Igmp (RPF IIF)
  Outgoing interface list:
      NULL
Counts: 1 (S, G) entries
        0 (*, G) entries

To display the summary of active multicast routes:

host1#show ip mroute summary active
              Active IP Multicast Routes >=4000 bps
Group Address   Source Address  RPF route          RPF Iif         #Oifs
--------------- --------------- ------------------ --------------- -----
232.0.0.1       51.0.0.1        51.0.0.0/24        ATM3/1.17       0
232.0.0.2       51.0.0.1        51.0.0.0/24        ATM3/1.17       0
232.0.0.3       51.0.0.1        51.0.0.0/24        ATM3/1.17       0
Counts: 3 (S, G) entries
        0 (*, G) entries

Meaning

Table 7 lists the show ip mroute active and show ip mroute summary active commands output fields.

Table 7: show ip mroute active and show ip mroute summary active 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

Counts

Numbers of types of source group mappings:

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

Group Address

IP address of the multicast group

Source Address

IP address of the multicast source

RPF Iif

Type and identifier for the incoming interface for the RPF route

#Oifs

Number of outgoing interfaces

Related Documentation