Re: [Sip] Draft submission: draft-ietf-sip-199-00

["Christer Holmberg" <christer.holmberg at ericsson.com>]

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: sip-bounces at ietf.org [mailto:sip-bounces at ietf.org] On Behalf Of
ashish.hsaxena at wipro.com
Sent: Monday, June 23, 2008 10:24 AM
To: ashish.hsaxena at wipro.com; christer.holmberg at ericsson.com
Cc: sip at ietf.org
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: christer.holmberg at ericsson.com
Cc: sip at ietf.org
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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_______________________________________________
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This list is for NEW development of the core SIP Protocol
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Use sipping at ietf.org for new developments on the application of sip