So I have several problems, but I'd like to start with this seemingly *simple* one. We're running CUCM 7.1.2, and I think multicasting MoH is configured correctly, I even see the MOHMulticastResourceActive value changing in the RTMT Performance section.
The problem is, when I set the multicast stream to be the first priority in CUCM, I hear no hold music. When I set our unicast stream to be first priority, I hear music. So this tells me we're only unicasting. How do I setup multicasting? Is there a good step-by-step guide? Based on conversations with our network administrator, multicasting is enabled on our LAN at the very least. He is not seeing any multicast packets coming out of CUCM, so I'm pretty certain something is mis-configured. Since I thought it was all correct and I was simply hearing silence, I assumed our switches/routers were blocking the traffic, but not according to the admin.
So any help would be greatly appreciated. We have a much larger problem with remote sites, SRST, using the gateways to stream MoH, but I'd like to sort out why we can't even multicast from CUCM to the local network. Thanks!!