Multicast Configuration on C6513

[zekebashi]

Hello,

I need some assistance with simple multicasting configuration on a C6513. We have two appliances that need to communicate using multicasting. These two appliances are uplinked to the same distribution switch (C6513). Both appliances have IP addresses within the same subnet (10.1.251.x/24; appliance A ip address: 10.1.251.25; and appliance B ip address: 10.1.251.26). The vendor's documentation stated that the appliances communicate via multicast group address 224.0.1.37; however, the source and receivers aren't communicating via this multicast group. I turned packet capture on the ASA, which is the default gateway for these two appliances-- 10.1.251.1). The log is attached.

My question is do I need to configure the uplink interfaces of the two appliances on the C6513 switch with multicast? If so, what are the commands? 

Thanks in advance.

Best, ~zK

[Reza Sharifi]

Hi,

Since the multicast traffic is layer-2 only (local to the switch), you don't need to configure the firewall.

Here is the config guide for the 6500.

https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SY/configuration/guide/sy_swcg/ipv4_igmp_snooping.html#49388

HTH

[zekebashi]

Thanks for the input, Reza!

So, will I need to configure the L3 switch or ports where the appliances are communicating via the multicast traffic?

https://www.cisco.com/c/en/us/td/docs/ios/12_2/ip/configuration/guide/fipr_c/1cfmulti.html?referring_site=RE&pos=1&page=https://www.cisco.com/c/en/us/support/docs/ip/ip-multicast/9356-48.html