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Catalyst 3750-X and 3560-X Switch Software Configuration Guide

OL-25303-03

Chapter 1 Configuring IP Multicast Routing

Monitoring and Maintaining IP Multicast Routing

• Clearing Caches, Tables, and Databases, page 1-63

• Displaying System and Network Statistics, page 1-63

• Monitoring IP Multicast Routing, page 1-64

Clearing Caches, Tables, and Databases

You can remove all contents of a particular cache, table, or database. Clearing a cache, table, or database

might be necessary when the contents of the particular structure are or suspected to be invalid.

You can use any of the privileged EXEC commands in Table 1-5 to clear IP multicast caches, tables, and

databases:

Displaying System and Network Statistics

You can display specific statistics, such as the contents of IP routing tables, caches, and databases.

Note This release does not support per-route statistics.

You can display information to learn resource usage and solve network problems. You can also display

information about node reachability and discover the routing path that packets of your device are taking

through the network.

You can use any of the privileged EXEC commands in Table 1-6 to display various routing statistics:

Table 1-5 Commands for Clearing Caches, Tables, and Databases

Command Purpose

clear ip cgmp Clear all group entries the Catalyst switches have cached

clear ip dvmrp route {* | route} Delete routes from the DVMRP routing table.

clear ip igmp group [group-name |

group-address | interface]

Delete entries from the IGMP cache.

clear ip mroute {* | group [source]} Delete entries from the IP multicast routing table

clear ip pim auto-rp rp-address Clear the auto-RP cache

clear ip sdr [group-address | “session-name”] Delete the Session Directory Protocol Version 2 cache or an sdr cache

entry

Table 1-6 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 dvmrp route [ip-address] Display the entries in the DVMRP routing table.

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.

Cisco Catalyst 3560-X User Manual

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