Re: Non-Last Small IPv6 Fragments

Tom Herbert <tom@herbertland.com> Fri, 11 January 2019 15:37 UTC

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From: Tom Herbert <tom@herbertland.com>
Date: Fri, 11 Jan 2019 07:37:00 -0800
Message-ID: <CALx6S35_54O+Xw8Q8z6G9eWQ2nAzMUzoUieGfG77-qF5sJ=dmQ@mail.gmail.com>
Subject: Re: Non-Last Small IPv6 Fragments
To: Fernando Gont <fgont@si6networks.com>
Cc: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net>, Brian E Carpenter <brian.e.carpenter@gmail.com>, IPv6 List <ipv6@ietf.org>
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On Fri, Jan 11, 2019 at 6:27 AM Fernando Gont <fgont@si6networks.com> wrote:
>
> On 11/1/19 10:31, Bjoern A. Zeeb wrote:
> > On 11 Jan 2019, at 3:02, Brian E Carpenter wrote:
> [....]
> >
> >
> > (*) If you really wanted to you’d need a way to signal the min-MTU
> > violation from the translator exception case to the end not and you’d
> > probably need some kind of extension header for that.  Sadly this wasn’t
> > done 20 years ago and neither for 8200.
>

Take a look at draft-hinden-6man-mtu-option. This is a Hop-by-Hop
option and is facilitated by the provision in RFC8200 that relaxes the
requirements that every intermediate node process Hop-by-Hop options.

> Then you'd need routers on the public Internet to pass packets with EHs,
> such that the signaling was sort of "reliable"...

I agree, we need the broken routers to start complying with Internet standards.

Tom

>
>
> --
> Fernando Gont
> SI6 Networks
> e-mail: fgont@si6networks.com
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