We have just upgrade from HP gear to Cisco. I have a 6500 running IOS and it has about 10 vlans. vlan 100 has a multicasting source, there is a routed port that goes out to the Internet and all other routed interfaces are vlan SVI's. I need to be able to multicast from the source in vlan100 to the other 9 vlans. I have ip multicast-routing enabled and ip pim sparse-dense mode enabled on all vlan SVI's. Yet other vlans cannot receive the multicast. Am I missing something?