I have a simple network that consists of 2 2960 switches configured with 2 vlans. There is one uplink to a 2621XM router. IGMP snooping is configured on their switches and IP multicast routing enabled on the router. When some attempts to image workstations all on vlan 2 using multicast (Powercast by Powerquest) the users on vlan 3 can no longer get to sites outside of the router. When I take a trace I see all the multicast packets on the uplink to the router. If I use my packetshaper to rate limit the packets all is right with the world.
1. Is this normal? Should I see all the multicast traffic on the router uplink?
2. If it is not how can I stop this?