Forward state - MAC not built

Unanswered Question
Aug 9th, 2007
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With regards to Multicasting, what 'Forward state - MAC not built' means. No amount of googling or

CCOing has provided an answer as yet.

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Pavel Bykov Thu, 08/09/2007 - 02:28
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That is a pickle... After issuing what command do you get this message?

I thought it would be the case when there are no endpoints that had send IGMP report... i.e. noone is listening to the group, or there is a group but there is no source...

Please post the command that had this in output and the platform you issued it on.

Also, here is a really nice Multicast repository from cisco, including official (although outdated) training.

A lot of info is at:


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