07-02-2009 02:06 PM - edited 03-15-2019 06:49 PM
I noted what seems to be excessive multicast traffic coming from a CME 2821 and was a-wonderin what would be considered normal.
I am seeing about 55 packets per second (3300 per minute) of the following:
Source: CME Router
Destination: 239.0.0.1
Protocol: UDP
Source Port: cisco-sccp
Destination Port: cisco-sccp
Data: no human readable :)
Is this normal or is something fishy going on here.
07-02-2009 02:21 PM
Not normal, possibly a bug, you can try upgrading.
09-01-2010 10:54 AM
I am having the same exact problem. Any more on this topic?
09-01-2010 10:55 AM
I am having the same exact problem. Any more on this topic?
09-01-2010 11:00 AM
That is probably MOH
09-01-2010 11:10 AM
I am having a problem with multicast UDP traffic causing slowness on the network. it's broadcasting multicast cisco-sccp packets about 200 a second to every one in the place. Below is the results of traffic monitoring on the network.
1121 21.200753 10.1.1.1 239.10.16.16 UDP Source port: cisco-sccp Destination port: cisco-sccp
So you think that the above indicates MOH traffic?
Wouldnt the ports be different if it were MOH?
09-01-2010 11:20 AM
Could you capture a Wireashark trace for a few seconds?
09-01-2010 11:24 AM
Sure gimme a minute. And thanks for you help.
09-01-2010 11:47 AM
09-01-2010 12:01 PM
Look under telephony-service in the router config, what are the two lines that start with
moh
multicast moh
09-01-2010 12:09 PM
Bingo..... so if I turn this off how will MoH work?
moh flash:/media/music-on-hold.au
multicast moh 239.10.16.16 port 2000
09-01-2010 12:23 PM
If you turn multicast MOH off you will not get MOH for ip phone to ip phone
calls(only TOH), you will still get MOH for PSTN calls that arew placed
on hold
09-01-2010 12:24 PM
Is there anyway to do the IP Phone to IP Phone without using multicast? Is there a such thing as unicast MoH?
09-01-2010 12:38 PM
Yes unicast MOH is an option, however it has a maximum of only 10 phones because it places more load on the router
09-01-2010 12:50 PM
Ok, Well thank you very much for your help. Much appreciated.
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