[SIPForum-techwg] SIPconnect 1.1 baseline - IPv6

[Elwell, John]

So I guess there are four options:
1. Mandate IPv4 only (which Henning is violently opposed to)
2. Mandate IPv6 for use in IPv6-only environments.
3. Mandate dual stack support (which would include things like
ICE/ICE-lite for negotiating version for media).
4. Mandate interworking (this is the area that is still heavily under
discussion in the IETF).

Personally I think option 1 would be sufficient, and I would not want to
go beyond option 2. Even option 2 raises the bar somewhat - my goal is
to keep the bar low and encourage a critical mass of implementations and
deployments.

John

> -----Original Message-----
> From: techwg-bounces at sipforum.org 
> [mailto:techwg-bounces at sipforum.org] On Behalf Of Henning Schulzrinne
> Sent: 13 August 2008 12:43
> To: Spencer Dawkins
> Cc: techwg at sipforum.org
> Subject: Re: [SIPForum-techwg] SIPconnect 1.1 baseline - IPv6
> 
> 
> On Aug 13, 2008, at 7:35 AM, Spencer Dawkins wrote:
> >
> >
> > I note that the level of effort on IPv4/IPv6 at IETF 72 was 
> intense  
> > - I
> > believe it was on the agenda for at least three working group  
> > meetings, two
> > area meetings, and the technical plenary. The IESG is still 
> figuring  
> > out
> > where work needs to take place. That's not sounding like a solved  
> > problem to
> > me.
> 
> Many of these were for transition issues; I don't think there 
> are many  
> open IPv6 issues for SIP, or for dual-stack systems.
> 
> 
> >
> >
> > On the other hand, the IETF may have a higher standard for its  
> > ultimate
> > solution than we need in order to accommodate IPv6 without waiting  
> > until
> > SIPconnect/2.0.
> >
> > Do we have an IPv4/IPv6 coexistence story we're happy 
> about, that we  
> > can
> > include in the 1.1 specification?
> >
> > So do you guys think there's a "good-enough" story that we can  
> > include, as
> > normative text, in 1.1?
> 
> If not, that's an urgent work item for the SIPPING and SIP working  
> groups. I think the only real issue is ICE support for IPv6. The  
> question is whether we can punt on this for now, if we assume that  
> initial IPv6 systems will be NAT-free.
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