How do you ignore multicast traffic on a switch but still pass through.

[sthurgood]

I have a scenario where I need to create a port channel between 2 switch stacks but they are linked between data centres with encryptors at each end and a q in q tunnel between them. When I try and form the port channel the internal switches react to the multicast and tell the outside switches there is no port channel set. The encryptors pass the multicast destination address in the clear so not hidden. I need the multicast destination to reach the far end so it can respond on either side. Is it possible to mask the destination or get the switches in between to ignore the multicast packet and just forward on? 

Thanks

[pieterh]

Q-in-Q is supported on port channels and virtual port channels (vPCs). 

-> you need to create the port-channel first and then configure the port-channel interface (not the individual ports) as Q-in-Q

also note:

You should disable IGMP snooping on the access VLAN allocated for the dot1q-tunnel port to allow
multicast packets to traverse the Q-in-Q tunnel