[Sipping] Re: I-D ACTION:draft-camarillo-sipping-v6-transition-00.txt

[Paul Kyzivat <[e-mail]>]

Gonzalo,

This is good. Glad you wrote it.

I see one omission. You talk about the need for a proxy that converts 
from v4 to v6 needed to record-route. But you didn't mention GRUUs. This 
adds another dimension to the reasons for GRUU - any node that isn't 
dual stack can't use its own address as a GRUU. And the server providing 
the GRUUs needs to be dual stack as well.

And a coworker of mine brought up another point regarding the 
registration of a dual stack endpoint. This is straightforward of the 
endpoint registers a contact with an FQDN. But if the endpoint doesn't 
have a DNS name, its not clear how it should register as dual stack. 
Registering two contacts, without some added indicators, isn't a good 
idea. But this could be managed using the same instance id proposed for 
use with GRUU.

	Paul

[e-mail] wrote:
> A New Internet-Draft is available from the on-line Internet-Drafts directories.
> 
> 
> 	Title		: IPv6 Transcition in the Session Initiation Protocol (SIP)
> 	Author(s)	: G. Camarillo
> 	Filename	: draft-camarillo-sipping-v6-transition-00.txt
> 	Pages		: 8
> 	Date		: 2005-2-15
> 	
> This document describes how IPv4 SIP (Session Initiation Protocol)
>    nodes can communicate with IPv6 SIP nodes.  Additionally, this
>    document also describes how a SIP user agent that supports IPv4 can
>    exchange media with one that supports IPv6.  Both single and
>    dual-stack user agents are considered in the discussions.
> 
> A URL for this Internet-Draft is:
> http://www.ietf.org/internet-drafts/draft-camarillo-sipping-v6-transition-00.txt
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