Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet

Tim Chown <tjc@ecs.soton.ac.uk> Tue, 05 November 2013 02:52 UTC

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From: Tim Chown <tjc@ecs.soton.ac.uk>
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Date: Tue, 5 Nov 2013 02:50:41 +0000
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References: <AA811674-7409-437A-B181-B226F81C381A@ecs.soton.ac.uk> <5278275C.50206@gont.com.ar> <EMEW3|dedd4c8528278c035fade0cbf2a8cb74pA3NRi03tjc|ecs.soton.ac.uk|AA811674-7409-437A-B181-B226F81C381A@ecs.soton.ac.uk> <CAPfnYRgTio5ajooEBnSU7C03ObGrPaezjjKOYs2u=msMjR0C2w@mail.gmail.com> <52785BC9.3040705@si6networks.com> <2E537845-6042-4572-B00E-A9197EFD9DF8@ecs.soton.ac.uk>
To: Fernando Gont <fgont@si6networks.com>
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Cc: IPv6 Operations <v6ops@ietf.org>, "6man@ietf.org" <6man@ietf.org>, Pedro Torres <torres@pop-pr.rnp.br>
Subject: Re: [v6ops] Some stats on IPv6 fragments and EH filtering on the Internet
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On 5 Nov 2013, at 02:45, Fernando Gont <fgont@si6networks.com> wrote:

> Hi, Pedro,
> 
> On 11/04/2013 05:53 PM, Pedro Torres wrote:
>> Tim/Fernando,
>> 
>> Wow! I'm scared of these results!
>> (If that was the intention, it worked!)
> 
> The intention certainly wasn't to scare anyone -- for instance, I didn't
> expect these results ot be that bad.
> 
> The goal of this measurements was to get some data regarding on where
> we're standing with respect to IPv6 fragmentation and extension headers.

And to encourage further measurements, which I think Fernando will do via his scripts (which I think are part of his wider set of IPv6 tools) and which a student here will do via use of and/or extending scapy.

We can then get some idea of where the problems exist, and whether, for example, there are ICMPv6 messages returned or the packets are simply being dropped.

> This is just data that is useful and should keep in mind when developing
> protocols and/or extensions.

Indeed, or when writing docs like the one Ron is authoring on extension header handling.

Tim