I heard of an issue with CGMP not working properly with IGMPv3? Has anyone seen this problem?
HI qster, as kunaltyagi says, you cant run both igmv3 or cgmp, because both practically do the same stuff.
With igmpv3 and also igmp snooping enabled, there is no need for cgmp, mean that the switch is also inspecting the source multicast streams from host that join or leave the groups, and builds another table for multicast traffic. (the job cgmp in the past done between the router and the switch).
The advtanage, it takes less time for the switch to know when a multicast host joins or leave a group.