RE: 3gpp-analysis-05: Use of NAT-PT in IPv6 UE -> IPv4 node

[Pekka Savola <pekkas@netcore.fi>]

On Mon, 22 Sep 2003, Karim El-Malki (HF/EAB) wrote:
[...]
>  >  3.4 IPv6 UE Connecting to an IPv4 Node 
>  > 
>  > The deployment of generic-purpose IPv6(-only) UEs is not 
>  > recommended until
>  > the IPv6 deployment has become so prevalent that direct 
>  > communication with
>  > IPv4(-only) nodes will no longer be necessary.
>  > 
>  > Specific-purpose UEs, capable of doing only specific kinds 
>  > of tasks, are a
>  > slightly different thing: it may be possible to make 
>  > assumptions on the
>  > nodes and communication protocols they need to use. Then it may be
>  > possible to deploy specialized IPv6(-only) equipment because 
>  > it's known
>  > that they do not need to reach an IPv4(-only) nodes except using very
>  > specific applications and methods -- and in that case, it is 
>  > possible to
>  > use specific translation and proxying techniques, not generic
>  > translation.
> 
> Pekka, as Juha menitoned, you are drawing a line between generic-purpose
> IPv6 UEs and specific purpose IPv6 UEs assuming this is a feasible way of
> labelling UE products. Not sure we can make such a distinction at this point.

Right .. but I see no usable labeling mechanism.

> It may be that all UEs will be in fact "specific purpose" in some way, so
> I don't see a gain in making this distinction.

But if they're generic purpose in some other ways, they're generic purpose 
overall, leading to certain recommendations.

I certainly see that labeling products like this is not easy, but that 
seems to be about the only way to describe the distinction of how to 
perform access from ipv6-only systems to ipv4.

> We could however point out
> the fact that IPv4 will remain useful for a long time, so in general
> dual-stack is the way to go if you don't know any better. I think this
> is a bit different from what is said above.

Depending on what kind of text this would result in, this might also be 
OK.  I don't quickly see how that would be singinificantly less of a 
rat-hole...

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings