I am trying to set up a GRE tunnel to pass multicast traffic. Currently I have 2 routers back-to-back for troubleshooting, but there will be a WAN in between my two routers. I have a laptop hanging off of each 2811 etherswitch module. I am able to ping between the laptops. I have run iperf as a multicasting tool and the traffic is showing up on the server, but I am getting a "read failed: connection reset by peer and warning: ack of last datagram failed after 10 tries." I am also trying to run a program between the two laptops that sends out multicast messages. I have hooked a sniffer up on the etherswitch and I see the traffic coming from the laptop to the multicast address, but I never see anything coming back. I also hooked up the sniffer between the 2 routers and the only traffic I see is PIMV2 hellos, membership requests, and RIPv2 protocols. I don't see anything coming or going from my tunnel IPs. Could someone please take a look at my config files and see how the multicasting setup looks?