CME 7.0(1) on 2811
3560G 24 Port PoE switch
The ports on the 3560G were very chatty, which I assumed was from the Multicast MoH stream send by CME. I configured IP Multicast routing on the voice VLAN for both the 2811 and 3560G. The excess traffic on the 3560G has subsided except the Ethernet trunk that links the 3560G and 2811 is still extremely chatty.
Should I be concerned or is this normal behavior?
CME by default will just start streaming the multicast when it is configured. It isn't 'kicked off' when MoH is called like one may expect.
In this scenario, the router is a simple multicast source. Meaning, you don't even need full multicast configuration on it. In this situation, it means that CME will stream the MoH towards the switch. This means your best case scenario is MoH on your trunk at all times, plus the ports for the IP phones.