Ip Igmp Query-Interval - Cisco Catalyst 4500 Series Command Reference Manual

Chapter 2 Cisco IOS Commands for the Catalyst 4500 Series Switches

ip igmp query-interval

To configure the frequency that the switch sends the IGMP host-query messages, use the ip igmp
query-interval command. To return to the default frequency, use the no form of this command.
Syntax Description
seconds
Defaults
The query interval is set to 60 seconds.
Command Modes Interface configuration mode
Command History Release
12.1(8a)EW
Usage Guidelines
If you use the default IGMP snooping configuration, the valid query interval values are from 1 to
65535 seconds. 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 the 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.
Changing the timeout period may severely impact multicast forwarding.
Note
Examples This example shows how to change the frequency at which the designated switch sends the IGMP
host-query messages:
Switch(config-if)# ip igmp query-interval 120
Switch(config-if)#
Related Commands
OL-27596 -01
ip igmp query-interval seconds
no ip igmp query-interval
Frequency, in seconds, at which the IGMP host-query messages are transmitted; valid
values depend on the IGMP snooping mode. See the "Usage Guidelines" section for more
information.
Modification
Support for this command was introduced on the Catalyst 4500 series switch.
Catalyst 4500 Series Switch Cisco IOS Command Reference—Release IOS XE 3.4.0SG and IOS 15.1(2)SG)
ip igmp query-interval
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