I have a problem with multicast traffic. I have a test sender and group, the traffic worked for weeks and has now stopped.
I have tried all the troubleshooting I can think of, the 1st hop router from the sender shows a S,G pair and the counters for this groups are increasing, but I have put a sniffer on the destination VLAN (directly connected to this router) and there is nothing there!
I have tried clearing the mroutes and restarted the sender and group. The forwarding tree looks good and there are no RPF errors that I can see.