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Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter 42 Configuring IP Multicast Routing
Monitoring and Maintaining IP Multicast Routing
Monitoring IP Multicast Routing
You can use the privileged EXEC commands in Table 42-6 to monitor IP multicast routers, packets, and
paths:
show ip igmp groups [group-name |
group-address | type number]
Display the multicast groups that are directly
connected to the switch and that were learned
through IGMP.
show ip igmp interface [type number] Display multicast-related information about an
interface.
show ip mcache [group [source]] Display the contents of the IP fast-switching
cache.
show ip mpacket [source-address | name]
[group-address | name] [detail]
Display the contents of the circular cache-header
buffer.
show ip mroute [group-name | group-address]
[source] [summary] [count] [active kbps]
Display the contents of the IP multicast routing
table.
show ip pim interface [type number] [count]
[detail]
Display information about interfaces configured
for PIM. This command is available in all software
images.
show ip pim neighbor [type number] List the PIM neighbors discovered by the switch.
This command is available in all software images.
show ip pim rp [group-name | group-address] Display the RP routers associated with a
sparse-mode multicast group. This command is
available in all software images.
show ip rpf {source-address | name} Display how the switch is doing Reverse-Path
Forwarding (that is, from the unicast routing table,
DVMRP routing table, or static mroutes).
show ip sdr [group | “session-name” | detail] Display the Session Directory Protocol Version 2
cache.
Table 42-5 Commands for Displaying System and Network Statistics (continued)
Command Purpose
Table 42-6 Commands for Monitoring IP Multicast Routing
Command Purpose
mrinfo [hostname | address] [source-address |
interface]
Query a multicast router or multilayer switch about
which neighboring multicast devices are peering
with it.
mstat source [destination] [group] Display IP multicast packet rate and loss
information.
mtrace source [destination] [group] Trace the path from a source to a destination
branch for a multicast distribution tree for a given
group.