Re: How to differentiate traffic in NAT-PT box?

[Elwyn Davies <elwynd@dial.pipex.com>]

Indeed so.

Have you read draft-ietf-v6ops-natpt-to-exprmntl-03.txt?

The Abstract says:
>    This document discusses issues with the specific form of IPv6-IPv4
>    protocol translation mechanism implemented by the Network Address
>    Translator - Protocol Translator (NAT-PT) defined in RFC 2766.  These
>    issues are sufficiently serious that recommending RFC 2766 as a
>    general purpose transition mechanism is no longer desirable, and this
>    document recommends that the IETF should reclassify RFC 2766 from
>    Standards Track to Experimental status
You should think very carefully before spending a lot of time on this work.

Regards,
Elwyn

Brian E Carpenter wrote:
> One of the many reasons for killing NAT-PT.
>
>     Brian
>
> haofeng Zhang wrote:
> > Dear all,
> >
> > I have a problem regarding to NAT-PT and ALG.
> > In the RFC2766(NAT-PT spec), nat-pt box cooperates with ALG to deal with
> > some application carrying IP addresses in payload. But for the 
> > operation of
> > nat-box box, how can the box differentiate which kind of traffic 
> > needs to be
> > processed by ALG and others needn't? Or the nat-pt box just send all 
> > traffic
> > to ALG module and leave the differentiation problem to ALG?
> > I don't find the clarification in the spec. So if answer is the 
> > latter, does
> > it means a big waste of device resource? After all, usually only the
> > signaling traffic needs to be processed by ALG.
> > So any kind of help is appreciated.
> >
> > --
> > Best regards,
> > Zhang haofeng