IGMP snooping for QinQ

Unanswered Question
Sep 24th, 2010

Most Cisco documentation suggests disabling IGMP snooping for

QinQ. However I have seen mention of a feature on the 7600 for

"IGMP snooping for QinQ ". Does anyone have any technical details on this feature or a link on where I can read more about how it works. I am particularly interested in router ports.

I have this problem too.
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Giuseppe Larosa Mon, 09/27/2010 - 13:28

Hello Steve,

ES 20 and other linecards are specialized linecards for metro ethernet I would say  that in this case IGMP snooping over QinQ is supported in HW by these linecards

to use them you need SUP720 3B or better

Hope to help


snt000001 Tue, 10/19/2010 - 04:12


Sorry for the delay and many thanks for your help. Unfortunately I was looking for details on how it would work technically.

Best regards



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