Displaying The Multicast Routing Table - Cisco Catalyst 4500 series Administration Manual

Monitoring and Maintaining IP Multicast Routing

Displaying the Multicast Routing Table

The following is sample output from the show ip mroute command for a router operating in dense mode.
This command displays the contents of the IP multicast FIB table for the multicast group named
cbone-audio.
Switch# show ip mroute cbone-audio
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned
R - RP-bit set, F - Register flag, T - SPT-bit set
Timers: Uptime/Expires
Interface state: Interface, Next-Hop, State/Mode
(*, 224.0.255.1), uptime 0:57:31, expires 0:02:59, RP is 0.0.0.0, flags: DC
(198.92.37.100/32, 224.0.255.1), uptime 20:20:00, expires 0:02:55, flags: C
The following is sample output from the show ip mroute command for a router operating in sparse
mode:
Switch# show ip mroute
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned
R - RP-bit set, F - Register flag, T - SPT-bit set
Timers: Uptime/Expires
Interface state: Interface, Next-Hop, State/Mode
(*, 224.0.255.3), uptime 5:29:15, RP is 198.92.37.2, flags: SC
Incoming interface: Tunnel0, RPF neighbor 10.3.35.1, Dvmrp
Outgoing interface list:
(198.92.46.0/24, 224.0.255.3), uptime 5:29:15, expires 0:02:59, flags: C
Incoming interface: Tunnel0, RPF neighbor 10.3.35.1
Outgoing interface list:
Interface timers are not updated for hardware-forwarded packets. Entry timers are updated
Note
approximately every five seconds.
The following is sample output from the show ip mroute command with the summary keyword:
Switch# show ip mroute summary
IP Multicast Routing Table
Flags: D - Dense, S - Sparse, C - Connected, L - Local, P - Pruned
Timers: Uptime/Expires
Interface state: Interface, Next-Hop, State/Mode
(*, 224.255.255.255), 2d16h/00:02:30, RP 171.69.10.13, flags: SJPC
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
37-24
Incoming interface: Null, RPF neighbor 0.0.0.0, Dvmrp
Outgoing interface list:
Ethernet0, Forward/Dense, 0:57:31/0:02:52
Tunnel0, Forward/Dense, 0:56:55/0:01:28
Incoming interface: Tunnel0, RPF neighbor 10.20.37.33, Dvmrp
Outgoing interface list:
Ethernet0, Forward/Dense, 20:20:00/0:02:52
Ethernet0, Forward/Sparse, 5:29:15/0:02:57
Ethernet0, Forward/Sparse, 5:29:15/0:02:57
R - RP-bit set, F - Register flag, T - SPT-bit set, J - Join SPT
Chapter 37 Configuring IP Multicast
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