Deepak Mohan wrote:
>
> In bis-03 Section 5.1.1 it says "The Via is always initialized to the host
> that originates the ACK request, i.e., the client user agent after a 2xx
> response or the first proxy or UAC to receive a non-2xx final response.
> For a non-200 class response, the Via in the ACK that is constructed MUST
> be the same as the request being acknowledged." I am having trouble
> understanding the second statement wrt the first. Can somebody clear this
> up?
This means that the topmost Via in an ACK for non-2xx responses MUST have
the same branch-id as the topmost Via for an INVITE did. This has been true
for CANCEL for a while now, but was not specified for an ACK to non-2xx
responses. Also see Section 10.46 (Via).
- vijay
--
Vijay K. Gurbani vkg@{lucent.com,research.bell-labs.com,acm.org}
Internet Software and eServices Group
Lucent Technologies/Bell Labs Innovations 263 Shuman Blvd., Rm 1A-413
Naperville, Illinois 60566 Voice: +1 630 224 0216 Fax: +1 630 713 0184
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