-----Original Message-----
From: Hui Deng [mailto:denghui02(_at_)gmail(_dot_)com]
Sent: Wednesday, September 28, 2011 2:52 AM
To: Dan Wing
Cc: teemu(_dot_)savolainen(_at_)nokia(_dot_)com;
satoru(_dot_)matsushima(_at_)gmail(_dot_)com;
ietf(_at_)ietf(_dot_)org; softwires(_at_)ietf(_dot_)org;
behave(_at_)ietf(_dot_)org
Subject: Re: [BEHAVE] Last Call: <draft-ietf-behave-v4v6-bih-06.txt>
(Dual Stack Hosts Using "Bump-in-the-Host" (BIH)) to Proposed Standard
inline please,
2011/9/27 Dan Wing <dwing(_at_)cisco(_dot_)com>
> -----Original Message-----
> From: teemu(_dot_)savolainen(_at_)nokia(_dot_)com
[mailto:teemu(_dot_)savolainen(_at_)nokia(_dot_)com]
> Sent: Monday, September 26, 2011 11:14 PM
> To: dwing(_at_)cisco(_dot_)com;
satoru(_dot_)matsushima(_at_)gmail(_dot_)com; ietf(_at_)ietf(_dot_)org
> Cc: softwires(_at_)ietf(_dot_)org; behave(_at_)ietf(_dot_)org
> Subject: RE: [BEHAVE] Last Call: <draft-ietf-behave-v4v6-bih-
06.txt>
> (Dual Stack Hosts Using "Bump-in-the-Host" (BIH)) to Proposed
Standard
>
> > I believe the objection is against "non-deterministic
translation",
> rather
> than
> > stateful versus stateless. By non-deterministic, I mean that
the
> subscriber's
> > equipment (e.g., CPE) cannot determine the mapping it will
have on
> the
> > Internet. A+P mechanisms are deterministic (including 4rd,
Dual-IVI,
> and
> > draft-ymbk-aplus-p).
> >
> > A stateful CGN, as commonly deployed, is not deterministic.
>
> I don't understand why that is significant enough factor for
IETF to
> (not)
> recommend some double translation variants. I mean does
existing
> applications work better if double translation is done in
deterministic
> manner?
Yes, it allows the CPE to implement an ALG -- if an application
needs
an ALG (e.g., active-mode FTP).
Are you saying distrbiuted ALG is much better than centralized ALG?
Best is no ALG. Worse is one ALG. Even worse is two ALGs.
-d
-Hui
-d
> One reasoning against double translation has been that it
> breaks
> some class of applications. Is it now so that some forms of
double
> translation do not break applications while some others do?
>
> Teemu
>
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