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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 40 Configuring IP Multicast Routing
Monitoring and Maintaining IP Multicast Routing
You can display information to learn resource utilization and solve network problems. You can also
display information about node reachability and discover the routing path your device’s packets are
taking through the network.
You can use any of the privileged EXEC commands in Table 40-7 to display various routing statistics:
Monitoring IP Multicast Routing
You can use the privileged EXEC commands in Table 40-8 to monitor IP multicast routers, packets, and
paths:
Ta ble 40-7 Commands for Displaying System and Network Statistics
Command Purpose
ping [group-name | group-address] Send an ICMP Echo Request to a multicast group address.
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] Display information about interfaces configured for PIM.
show ip pim neighbor [type number] List the PIM neighbors discovered by the switch.
show ip pim rp [group-name | group-address] Display the RP routers associated with a sparse-mode multicast group.
show ip rpf {source-address | name} Display how the switch is doing Reverse-Path Forwarding (that is, from
the unicast routing table or static mroutes).
show ip sdr [group | “session-name” | detail] Display the Session Directory Protocol Version 2 cache.
Ta ble 40-8 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.