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Re: Next Header value 59 [was Re: Review of draft-ietf-6man-rfc2460bis-05]

Tim Chown <Tim.Chown@jisc.ac.uk> Wed, 31 August 2016 08:30 UTC

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From: Tim Chown <Tim.Chown@jisc.ac.uk>
To: "huitema@huitema.net" <huitema@huitema.net>
Subject: Re: Next Header value 59 [was Re: Review of draft-ietf-6man-rfc2460bis-05]
Thread-Topic: Next Header value 59 [was Re: Review of draft-ietf-6man-rfc2460bis-05]
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Date: Wed, 31 Aug 2016 08:30:10 +0000
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Cc: "6man@ietf.org" <6man@ietf.org>, Bob Hinden <bob.hinden@gmail.com>
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On 30 Aug 2016, at 22:41, huitema@huitema.net<mailto:huitema@huitema.net> wrote:

It is used in Teredo. The Teredo bubbles have no payload, hence set payload type to 59.

OK, thanks, that seems a reasonable generic use case, even if there’s only one example :)

But given it’s not in RFC 7045, anyone kind enough to implement the advice there won’t necessarily include header 59.

Tim

Sent from my Windows 10 phone

From: Brian E Carpenter<mailto:brian.e.carpenter@gmail.com>
Sent: Tuesday, August 30, 2016 1:40 PM
To: Bob Hinden<mailto:bob.hinden@gmail.com>; Tim Chown<mailto:Tim.Chown@jisc.ac.uk>
Cc: 6man@ietf.org<mailto:6man@ietf.org>
Subject: Next Header value 59 [was Re: Review of draft-ietf-6man-rfc2460bis-05]

On 31/08/2016 08:19, Bob Hinden wrote:

...
>> p.22 is Next Header value 59 used in practice? (Just curious… it was omitted from RFC7045).
>
> I am not 100% sure, but think it is used.  But it is not something that has been updated.

It's a curious case, but we didn't mention it in 7045 or ask IANA to include it in
http://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml#extension-header
because, well, it isn't a header and doesn't require any processing. I think
that's OK.

Regards
     Brian

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