As always great post. I want to clarify the IGMP querier election as this behavior may change depending upon the hardware that is used. For instance, on 6500 there isn't a querier election and you must make sure there is only one IGMP querier configured per Vlan.
I see I was focusing on multicast enabled routers.
When we deal with IGMP snooping the IGMP snooping querier is an aid to allow to use IGMP snooping optimization on a vlan where we want to confine multicast (and so there is no multicast capable router running PIM) otherwise we should turn off IGMP snooping.
C6500 configuration guide advices to configure one and only one device as IGMP snooping querier.
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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