Switch User Manual

IGMP Query Commands
33-9
33
• This command defines the time after a query, during which a response is
expected from a multicast client. If a querier has sent a number of queries
defined by the ip igmp snooping query-count, but a client has not
responded, a countdown timer is started using an initial value set by this
command. If the countdown finishes, and the client still has not responded,
then that client is considered to have left the multicast group.
Example
The following shows how to configure the maximum response time to 20 seconds:
Related Commands
ip igmp snooping version (33-3)
ip igmp snooping router-port-expire-time
This command configures the query timeout. Use the no form to restore the default.
Syntax
ip igmp snooping router-port-expire-time seconds
no ip igmp snooping router-port-expire-time
seconds - The time the switch waits after the previous querier stops before
it considers the router port (i.e., the interface which had been receiving
query packets) to have expired.
(Range: 300-500)
Default Setting
300 seconds
Command Mode
Global Configuration
Command Usage
The switch must use IGMPv2 or v3 snooping for this command to take effect.
Example
The following shows how to configure the default timeout to 300 seconds:
Related Commands
ip igmp snooping version (33-3)
Console(config)#ip igmp snooping query-max-response-time 20
Console(config)#
Console(config)#ip igmp snooping router-port-expire-time 300
Console(config)#