Thursday, January 07, 2010

Multicast: Hosts that dont support IGMP

If there are hosts that dont support IGMP on a LAN Segment.
The router connecting that LAN segment can join IGMP group statically on their behalf

int f0/0
ip igmp static-group 235.1.1.1

Here if we ran a ping 235.1.1.1 from the source, the Router will not respond only the receivers ( End Hosts) will respond.

Whereas in the igmp join-group, even the router's interface responds.

Also (*,G) entry for join-group will have flags C (Connected) & L(Local)
The static-group will have flags C (Connected) only..

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