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Re: Death by extension header (was:RE: New Version Notification for draft-li-6man-hbh-fwd-hdr-00.txt)

Toerless Eckert <tte@cs.fau.de> Mon, 13 July 2020 20:02 UTC

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Date: Mon, 13 Jul 2020 22:01:41 +0200
From: Toerless Eckert <tte@cs.fau.de>
To: Fernando Gont <fernando@gont.com.ar>
Cc: Tom Herbert <tom@herbertland.com>, "6man@ietf.org" <6man@ietf.org>
Subject: Re: Death by extension header (was:RE: New Version Notification for draft-li-6man-hbh-fwd-hdr-00.txt)
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On Mon, Jul 13, 2020 at 03:00:44PM -0300, Fernando Gont wrote:
> On 10/7/20 15:32, Toerless Eckert wrote:
> > IMHO: See my email earlier in the thread about punting stuff to slow-path, especially when/before
> > you figure out that you should have just ignored something at linerarte.
> > 
> > Aka: not sufficiently prescriptive RFCs + bad implementations == extension header based features killed in deployments.
> 
> Indeed. And add to that that the EH structure itself seems to be rather
> unfriendly with some popular hardware architectures. (unless with "not
> sufficiently prescriptive RFCs" you are meaning to set the maximum EH-header
> chain length to some sane value that folks might agree to comply with).

I think we might want to start with a draft collecting what we think to
kow about the problem and figure out if we can structure it accordingl
to make sense out of it to make progress that is not just incrementally fixing
one single bit. 

Cheers
    Toerless

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