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Catalyst4500 Series SwitchCiscoIOS Command Reference—Release 12.2(18)EW
78-16201-01
Chapter2Cisco IOS Commands for the Catalyst 4500 Series Switches
ip igmp query-interval
ip igmp query-interval
To configure the frequency that the switch sends IGMP host-query messages, use the ip igmp
query-interval command. To return to the default frequency, use the no form of this command.
ip igmp query-interval seconds
no ip igmp query-interval
Syntax Description
Defaults The query interval is set to 60 seconds.
Command Modes Interface configuration
Command History
Usage Guidelines If you use the default IGMP snooping configuration, the valid query interval values are from 1 to
65535seconds. If you have changed the default configuration to support CGMP as the IGMP snooping
learning method, the valid query interval values are from 1 to 300 seconds.
The designated switch for a LAN is the only switch that sends IGMP host query messages. For IGMP
version 1, the designated switch is elected according to the multicast routing protocol that runs on the
LAN. For IGMP version 2, the designated querier is the lowest IP-addressed multicast switch on the
subnet.
If no queries are heard for the timeout period (controlled by the ip igmp query-timeout command), the
switch becomes the querier.
Note Changing the timeout period may severely impact multicast forwarding.
Examples This example shows how to change the frequency at which the designated switch sends IGMP host query
messages:
Switch(config-if)# ip igmp query-interval 120
Switch(config-if)#
Related Commands ip igmp query-timeout (refer to Cisco IOS documentation)
ip pim query-interval (refer to Cisco IOS documentation)
show ip igmp groups (refer to Cisco IOS documentation)
seconds Frequency, in seconds, at which IGMP host query messages are transmitted; valid values
depend on the IGMP snooping mode. See “Usage Guidelines” for more information.
Release Modification
12.1(8a)EW Support for this command was introduced on the Catalyst 4500 series switch.
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