Cisco Systems 3560X Manual De Usuario

48-43

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

OL-21521-01

Chapter 48 Configuring IP Multicast Routing

Configuring Optional IGMP Features

You can configure the query interval by entering the show ip igmp interface interface-id privileged
EXEC command.

Beginning in privileged EXEC mode, follow these steps to change the IGMP query timeout. This
procedure is optional.

To return to the default setting, use the no ip igmp querier-timeout interface configuration command.

Changing the Maximum Query Response Time for IGMPv2

If you are using IGMPv2, you can change the maximum query response time advertised in IGMP
queries. The maximum query response time enables the switch to quickly detect that there are no more
directly connected group members on a LAN. Decreasing the value enables the switch to prune groups
faster.

Beginning in privileged EXEC mode, follow these steps to change the maximum query response time.
This procedure is optional.

To return to the default setting, use the no ip igmp query-max-response-time interface configuration
command.

Command

Purpose

Step 1

configure terminal

Enter global configuration mode.

Step 2

interface

interface-id

Specify the interface to be configured, and enter interface configuration
mode.

Step 3

ip igmp querier-timeout

seconds

Specify the IGMP query timeout.

The default is 60 seconds (twice the query interval). The range is 60
to 300.

Step 4

end

Return to privileged EXEC mode.

Step 5

show ip igmp interface

[interface-id]

Verify your entries.

Step 6

copy running-config startup-config

(Optional) Save your entries in the configuration file.