I have a dumb (unmanaged 8-port Linksys Gig switch) which we are currently using for some linux clustering servers. It works fine, but I want to move the servers to our 6500. When I moved them from the switch to our 6500, the cluster breaks because multicast isn't working in the same way as it is on the unmanaged switch. Each server has 3 NIC interfaces, (Production network routed, iSCSI private, and metadata (multicast) private) so one physical port is residing on it's own VLAN. All server interfaces are static IP assignments. The other 2 VLANs are working properly, the metadata VLAN seemingly is breaking the cluster because they can't communicate via multicast. Vlan 999 is for the clustering metadata, and is defined as a VLAN.
I had defined vlan 999 as a SVI with no ip address and enabling pim sparse-dense-mode, but that didn't work for the servers either.
I would appreciate any help in getting the member ports of that vlan to act like the dumb switch the servers are now on. The multicast traffic needs to stay isolated (like it is on the separate switch). All the vlan ports are on the same line card.
switchport access vlan 999
Okay, looks like the command is not available on your switch. Apologies for that.
You are correct, with a 6500 running SXH you should turn off IGMP snooping under the vlan interface. So you could do one of 2 things -
create a L3 vlan interface for 999 and then
1) turn off IGMP snooping under the interface in which case the multicast traffic should be flooded to all ports in that vlan
2) configure the IGMP snooping querier function for that vlan so that only the ports that want the multicast traffic get it