Chapter 22
| Multicast Filtering Commands
IGMP (Layer 3)
– 631 –
ip igmp query-interval This command configures the frequency at which host query messages are sent.
Use the no form to restore the default.
Syntax
ip igmp query-interval seconds
no ip igmp query-interval
seconds - The frequency at which the switch sends IGMP host-query
messages. (Range: 1-255 seconds)
Default Setting
125 seconds
Command Mode
Interface Configuration (VLAN)
Command Usage
◆ Multicast routers send host query messages to determine the interfaces that
are connected to downstream hosts requesting a specific multicast service.
Only the designated multicast router for a subnet sends host query messages,
which are addressed to the multicast address 224.0.0.1, and uses a time-to-live
(TTL) value of 1.
◆ For IGMP Version 1, the designated router is elected according to the multicast
routing protocol that runs on the LAN. But for IGMP Version 2 and 3, the
designated querier is the lowest IP-addressed multicast router on the subnet.
Example
The following shows how to configure the query interval to 100 seconds.
Console(config-if)#ip igmp query-interval 100
Console(config-if)#
Related Commands
ip igmp max-resp-interval (630)
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