Hello all,
I am reading the CCIE R&S 4th edition book and came across something in the multicast section that isn’t exactly clear about IGMP query messages.
It reads that General Query messages are sent out to determine if any host wants traffic from any group – with a default of 125 seconds b/t messages
Also it reads that Host membership query messages are sent on each interface to see if any host wants traffic from any group – with a default of 60 seconds b/t messages.
Finally it reads that Group specific membership queries are sent to see if any hosts want a specific group’s traffic – which is sent after a leave message for a particular group is sent.
I understand the group-specific query messages, but my question is – what is the difference between General Query and Host Membership Query messages? It sounds as if they do the exact same thing, but with different timers??? The book doesn’t dive into this explanation, and I am having a hard time finding the answer on the web.
Any help is greatly appreciated.
Thanks,
Sanjay