Re: Doubt related to use of Supported and Require header.

Hi Vineet,
 
I think its pretty clear from two paragraphs in section  "8.2.4 Applying
Extensions" of RFC 3261. 
 
Regards
Krishna


________________________________

From: [email protected] [mailto:[email protected]] On Behalf Of
Vineet Gupta
Sent: den 9 september 2008 17:28
To: [email protected]
Subject: [Sip] Doubt related to use of Supported and Require header.


Hi,
 
I have a small doubt related to use of Supported and Require header.
While from RFC 3261 it is clear the Require header is used by the UAC
and UAS to enforce the extension implemention for a particular session,
while the Supported header is mostly used by UAC to express the
extensions which can be enforced by UAS through the Require header.
 
My doubt is that, is it mandatary that every extension that is present
in Require header must be present in Supported header in the request?
According to me, presence/absence of Required extensions in Supported
header does not make any impact on UAS handling.  Even if it is not
mandatory, what is the preferred approach?
 
Regards,
Vineet.

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