Multicast on 6500 vs unmanaged switch

Unanswered Question
Apr 15th, 2010
User Badges:

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 apparently I don't have multicast enabled properly for the servers.  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, but not as an interface VLAN as I'm assuming I don't need any L3 features.

What do I need to do configure my 6500 ports to act like a dumb switch?

Global Config:

ip multicast-routing

port config:

interface GigabitEthernet4/33


switchport access vlan 999

spanning-tree portfast


  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 0 (0 ratings)
Giuseppe Larosa Fri, 04/16/2010 - 11:38
User Badges:
  • Super Silver, 17500 points or more
  • Hall of Fame,

    Founding Member

Answered in LAN forum

Best Regards



This Discussion