Sunday, June 14, 2009

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)

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