Re: New Version Notification for draft-ietf-sipping-sip-offeranswer-12

Hi,

I just find time to review the parts about PRACK and non-offer ReINVITE.

I am OK with the PRACK parts now. 

The ReINVITE part is a little complex as it has two levels. The first 
level is the UAS should arrange the offer by it's means. And it has been 
modified, and I am OK with it now.
The second level is the BCP/normative description about the content of the 
offer. I think we still haven't come to an agreement. But I really think 
that as there are people(such as Keith and you) treat it as normative 
description, I am OK with your current text.

Thanks,

Gao

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Paul Kyzivat <[email protected]> 
发件人:  [email protected]
2010-03-08 22:25

收件人
sipping <[email protected]>
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Re: [Sipping] New Version Notification for 
draft-ietf-sipping-sip-offeranswer-12






I just submitted draft-ietf-sipping-sip-offeranswer-12.txt.

It addresses comments received re -11 from Okumura Shinji, Brett Tate, 
Gao Yang, and Keith Drage.

Shinji had a number of comments regarding sections 4.1 and 4.2. I tried 
to fit them in, not literally, but hopefully in spirit. I had better 
luck with section 4.1. For 4.2 I disagree that 3311 forbids the sending 
of an UPDATE while awaiting a prack. (It probably should have been, but 
I don't see that it is.) Ultimately I couldn't figure out how to make 
the comments on that section work. Modulo the parts I agreed with the 
existing text has equivalent meaning, so I left it unchanged.

Brett pointed out that Retry-After cannot be used with 491. I have 
removed any suggestion that it should be.

Gao wanted more emphasis on avoiding cases where it might be necessary 
to fail a prack. I have reworded things to make that more explicit and 
removed suggestions to use 491 as a response to prack.

Keith objected to normative language in the suggestions that Gao made. I 
have avoided using normative language.

Please review this carefully - its always possible that subtle issues 
could have crept in.

                 Thanks,
                 Paul

IETF I-D Submission Tool wrote:
> A new version of I-D, draft-ietf-sipping-sip-offeranswer-12.txt has been 
successfuly submitted by Paul Kyzivat and posted to the IETF repository.
> 
> Filename:               draft-ietf-sipping-sip-offeranswer
> Revision:               12
> Title:                                  SIP (Session Initiation 
Protocol) Usage of the Offer/Answer Model
> Creation_date:                  2010-03-08
> WG ID:                                  sipping
> Number_of_pages: 22
> 
> Abstract:
> The Session Initiation Protocol (SIP) utilizes the offer/answer model
> to establish and update multimedia sessions using the Session
> Description Protocol (SDP).  The description of the offer/answer
> model in SIP is dispersed across multiple RFCs.  This document
> summarizes all the current usages of the offer/answer model in SIP
> communication.
>  
> 
> 
> The IETF Secretariat.
> 
> 
> 
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