SSH into the AP and run the following commands to see if it's already enabled by default:
>show run include-factory | include ip igmp or >show context include-factory | include ip igmpYou should see something like this: ip igmp snooping
 ip igmp snooping forward-unknown-multicast
 no ip igmp snooping querier
 ip igmp snooping querier max-response-time 10
 ip igmp snooping querier timer expiry 60
 ip igmp snooping querier version 3
 ip igmp snooping querier query-interval 60
 ip igmp snooping querier robustness-variable 2
 no ip igmp snooping fast-leaveWhat do you get when you run these commands?
					
				
			
			
				
	Christoph S.