I work at a datacenter where we run many applications and many backups. There is no music/video streaming but there are so many applications I'm sure one of them is using multicast. How can I tell if I need to enable IGMP snooping? Would there be any unwanted side effects if I enabled IGMP?
as far as I know IGMP snooping is only beneficial when you have got L3 multicast in your network which doesn't seem the case here as we only see L2 multicast packets on the switch. It may be CDP,STP,VTP but L2 multicast only is not using IGMP so no need for IGMP snooping.