Re: FW: I-D ACTION:draft-ietf-v6ops-ent-scenarios-03.txt

[Tim Chown <tjc@ecs.soton.ac.uk>]

On Sat, Jul 03, 2004 at 02:23:10AM -0400, Bound, Jim wrote:
> > If Scenario 3 is an IPv6-only infrastructure and IPv6 nodes, 
> > that wish to communicate with a separate IPv4-only network, 
> > then you're in the NAT-PT, TRT or ALG space (depending which 
> > layer you want to translate at).
> 
> If you mean IPv6 only stack yes but not dual stack which adds v4 in v6
> tunnels as solution. 

OK, but that needs to be clarified, I think.   In the one case you need 
protocol translation, in the other case you can tunnel.   If scenario 3
is both, state it clearly, if it isn't, state it clearly :)
 
> I don't believe we will see IPv6 ONLY stacks for a very long time.

Possibly, but hybrid stack nodes with only IPv6 configured is happening now?
 
> > If Scenario 3 is IPv6 infrastructure (routers, and IPv6-only 
> > on the wire) but with some dual-stack nodes or legacy 
> > applications communicating with each other over IPv4 (e.g. 
> > the application is IPv4 only) or to IPv4 nodes outside the 
> > network, then you may be in the DSTM solution space.
> 
> And tunnel broker space too.

Yes, you could run an IPv4-in-IPv6 tunnel broker.  I don't think I've seen
one yet, but it's possible of course.
 
Since we are having a minor revision, my request is thus just to clarify 
what Scenario 3 is (or indeed if there is perhaps a Scenario 4).  

Tim