PIM - IGMP QUERIER TIMEOUT

The router elected as IGMP querier will send out an IGMP query each configured interval. If non IGMP querier routers on the same LAN segment do not hear any IGMP queries for a period of time they will try and assume the IGMP querier role.

The timers used in this exchange are as follows

ip igmp query-interval (default 60 seconds)

ip igmp querier-timeout (default 120 seconds - 2 * ip igmp query interval)

PIM - IGMP GROUP QUERY TIMERS

The IGMP querier will send out an igmp group query to check group memmbership on the connected LAN segment. Normallly an IGMP group report response will be received. If no group report is received then the (*,G) mroute is removed.

In this message exchange the following timers can be influenced.

ip igmp query-interval (default 60 seconds)

ip igmp query-max-response-time (default 10 seconds).