Subject: [Sip] Do we(Registrar or UA) need to listen for any other multicast other than sip.mcast.net(224.0.1.75) ?

From: Ulrich Prakash <[email-masked]>
Date: Sat, 05 Jan 2002 19:59:51 -0800

Hi,

I want to know, if our Registrar or UA, need to listen for any other 
multicast IP address, other than sip.mcast.net(224.0.1.75).
 From the link, http://www.iana.org/assignments/multicast-addresses , I 
find that only 224.0.1.75 is allocated to sip.

If so, how are those Multicast IP addresses(values) chosen,when the UA or 
Registrar is to be online on the Internet?
And when do we really need more than one multicast group?

Any replies,suggestions,pointers in this regard would be helpful.
Thanks,
Prakash.

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