Verifying That the IGMP Snooping Group Query Timeout Value Has Been Changed Correctly
Purpose
Verify that the IGMP snooping group query timeout value has been changed correctly from its default value.
Action
Display the IGMP protocol information:
user@switch> show configuration protocols
igmpquery-interval 150;
query-response-interval 50;
accounting;
interface vlan.43 {
version 2;
}
Display the IGMP snooping membership information, which contains the group query timeout value that was derived from the IGMP configuration:
user@switch> show show igmp-snooping membership detailVLAN: v43 Tag: 43 (Index: 4)
Group: 225.0.0.1
Receiver count: 1, Flags: <v2–hosts>
ge-0/0/15.0 Uptime: 00:00:05 timeout: 350Meaning
When you enable IGMP snooping on a switch, the query-interval and query-response-interval values are set to their default values and are applied to all VLANs created on the switch. The IGMP snooping group timeout value is derived from these default settings. Based on the default values, the initial IGMP snooping group query timeout value is 260.
To change the group query timeout value, change the query-interval and query-response-interval values at the [edit protocols igmp] hierarchy level. The IGMP snooping group query timeout value is then recalculated based on the new IGMP configuration settings.
The output from the show protocols igmp command shows the revised IGMP configuration settings for query-interval and query-response-interval. You know that these values have been revised because they are different from the default values. The output from the show igmp-snooping membership detail command shows the revised group query timeout value, 350, which was derived from the new IGMP configuration settings.
