In message <[EMAIL PROTECTED]> Lei Liang <[EMAIL PROTECTED]>
writes:
> I see in rfc2543 that servers and UACs may send request via multcast
>address and when the next downstream hop response this request, it will
>send it back via the multicast address derived from the via headers of
>the request. but how could the upstream hop receive the response if it's
>not a member of this multicast group?
The section 10.46.1 in bis04 states that client MAY insert a
maddr parameter with unicast address to the Via header. If
client does not belong to the group it sent the request, it just
inserts its own unicast address to the Via header and then sits
and waits for a whole bunch of 100 Trying messages to arrive.
Pekka
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