Subject: [SIP] VIA response

From: Baniel Uri-CUB001 <[email-masked]>
Date: Mon, 20 Nov 2000 15:24:20 -0600

Hello

2543bis
section 1.4.3 SIP Transaction says:
..... If the request is sent via multicast UDP, the response is directed to the same multicast address and destination port.

My question is: assume a UAC sends an INVITE, which goes via P1 and P2. The P2 multicast it to the multicast group MG1, which P3 happens to be one of its members.
So to whom shall P3 return the response? is it to MG1? if that is the case, is P2 member of MG1? If yes why does the response go to the other group members ?

Thanks

Uri

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