Anyone know how to enable Multicast on specific VLAN's only. I have a 4507 switch which is trunked to a 7206 router where different VLAN's are supported through it(VLAN's are separated at the router using VRF's / dot1Q). I'm trying to figure out how to enable and allow specific VLAN's on the switch for Multicast. Is there a way to enable Multicast for specific VLAN's only???