Multicast filtering

From: deji500@hotmail.com
Date: Thu Feb 15 2007 - 07:26:28 ART

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Hi GS

I have a question that has been bugging me for a while. If you configure multicast filtering using ip igmp access-group, multicast boundary or ip igmp filter, should you still be able to receive echo replies from a router whose group membership has been limited by a multicast filter.

For example
R1 Connects to R2. On R2's ethernet connection to R1, you configure a filter denying 226.26.26.26. You configure the ip igmp join-group 226.26.26.26 on R1 anyway. R3 sits elsewhere on the network. If you ping 226.26.26.26 from R3, should R1 answer? I have checked many different labs as well as DocCD and the only way used to verify this type of scenario is to check the config.

Please help

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