What triggers a L2-switch configured as "ip icmp snooping querier" to send out group-specific queries to a multicast group? I know that this normally happens after IGMP Leave messages to speed up the Leave process, however in my case there are no such messages visible in a wireshark trace. I wonder whether there are other conditions that bring the switch to send out this kind of message.
I can see the General Membership Query on a regular basis of 60 secs and the two Group-specific queries 1 sec after the other. It is IGMPv2 I am looking at.
So, yes the wireshark capture time is greater then the igmp query interval.
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