Right - Require is inappropriate. Supported is certainly possible. I
think it would simply mean that the UAC understands the significance of
199 and so is prepared to take advantage of it if received. I see no
reason why you would change it on a call by call basis. The resources
aren't committed at the time of the INVITE - rather at the time the
provisional response is received, so doing on a per-call basis wouldn't
make much sense.
Paul
Christer Holmberg wrote:
Hi,
Can we use Require:199 to indicate to proxy to send 199?
No. The Require header is only applicaple to a UAS.
You can use Proxy-Require for proxies, but the problem is that you would
require this from EVERY proxy in the path.
Regards,
Christer
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of
[EMAIL PROTECTED]
Sent: Monday, June 23, 2008 10:24 AM
To: [EMAIL PROTECTED]; [EMAIL PROTECTED]
Cc: [email protected]
Subject: Re: [Sip] Draft submission: draft-ietf-sip-199-00
Probably everybody is busy. Any thoughts on this one.
Best Regards,
Ashish Saxena
877-5570
-----Original Message-----
From: Ashish Saxena (WT01 - Telecom Equipment)
Sent: Friday, June 20, 2008 10:56 AM
To: [EMAIL PROTECTED]
Cc: [email protected]
Subject: RE: [Sip] Draft submission: draft-ietf-sip-199-00
Hi Christer,
From Section 4 (Client Behaviour) part of this draft, I
understood that primary objective of this draft is to give indication to
UAC to release resources, if any. I am little worried about extra
messaging that will be seen because of 199 implementation. Can there be
a way to tell proxies and UAS downstream that UAC has some resources
reserved for this call and would be interested in receiving 199, if
possible?
IMO, UAC (mostly) is in better understanding of the resources that it
has reserved for a particular call. So UAC can selectively add something
in INVITE to tell downstream proxies/ UAS' about its interest.
IMO, we can have a package for 199 and UAC can use "Supported" header to
indicate entities downstream that it would be interested in getting 199
for this *particular* call. Implicitly it would mean that UAC has
reserved some resources. I understand that we would changing the meaning
of "Supported" header on per call basis :-(. Something else may be?
Comments please.
Best Regards,
Ashish Saxena
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