Hello...we are trying to enable mulitcast routing from our Internal 4507 core. Currently, we are able to view a multicast stream from our ISP thru our 6509 which has a FWSM. The internal 4507 is connected to the 6509 over an ether-channel, which gateways to the "inside" interface of the FWSM. Multicast routing is working internally (between VLANs)on the 4507, but we are not able to view the stream through our ISP (like we are on our 6509 VLANs). Our 6509 is running in Hybrid mode, our 4507 is running straight IOS. Is there something about the ether-channel that is causing us the problem perhaps? Any help, documentation would be much appreciated.