Re: [Sipping] Rollback issue: a proposal

[Paul Kyzivat <[e-mail]>]

Gonzalo,

Very concise documents!

In terms of best practice I think they are good.

In terms of what to do if one finds oneself in a position where these 
procedures aren't used, I think it is still not entirely clear. Even so, 
I think we might be able to structure guidance around that. I think we 
also must still decide if we need to make a *normative* change here or not.

A key part of the doc is the guideline: don't send an error response to 
the reinvite unless no changes have been made since the reinvite was 
sent. As long as that guidance is followed I think most things are good.

Having the UAS send another o/a when the above wasn't followed seems 
like a good idea. Of course there is a window in there until that o/a is 
completed, and the state during that time (and offered in that offer) 
should still be defined if possible.

	Thanks,
	Paul

Gonzalo Camarillo wrote:
> Hi,
> 
> I have put together the following draft. It contains a proposal for the 
> rollback issue that has been discussed on the list:
> 
> http://www.ietf.org/internet-drafts/draft-camarillo-sipping-reinvite-00.txt
> 
> I have also written another short draft on an issue related to 
> preconditions that was also discussed on the list in one of the 
> rollback-related threads:
> 
> http://www.ietf.org/internet-drafts/draft-camarillo-sipping-precons-00.txt
> 
> Comments are welcome.
> 
> Cheers,
> 
> Gonzalo
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