[cisco-voip] Multicast MOH from CM/MRGL

[Ryan Ratliff]

Multicast MOH streams always stream.  How far this propagates into your network depends on your multicast config but under normal circumstances I would not expect g.711 or g.729 audio streams (even 51 times however many codecs you have enabled) would stress a FastE or GigE port.  I'd guess any server with a FastE port is going to get cpu/disk bound way before the nic does serving up that much MOH.

-Ryan

On Feb 11, 2013, at 3:07 PM, Ed Leatherman <ealeatherman at gmail.com> wrote:

Hello everyone,

If an MOH audio source in CM (8.6) is configured to "allow multicasting", at which point should the server actually begin sending MOH to a multicast group?

The reason I am asking is, I have many of my audio sources configured to allow multicasting, but on purpose I have no MRGL setup to actually use multicasting. The reason being is want the audio to continue playing so callers don't start at the beginning of the audio track every time they are placed on hold. Actually I don't care so much but my internal customers do :)

however, i'm seeing still a bunch of multicast coming from my TFTP/MOH server still going to my publisher which is on the same switch and VLAN. In fact, the majority of the traffic on that switch port is just this MOH traffic. Normally it isn't something I'm worried about, however I'm also noticing packet discards on the publisher's switchport and that IS something i'm concerned about. 

Thanks!

-- 
Ed Leatherman
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