Chapter 13: Setting Internet Group Management Protocol (IGMP) Snooping
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Router IP— Indicates the IP addresses of the multicast routers.
Time to Expiry— Specifies the number of seconds remaining
before the switch times out a multicast router if there are no further
IGMP queries from it.
4. Click Clear group membership to remove the static multicast router
ports.
Removing all multicast router ports also activates auto-detect.