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Re: [BEHAVE] UDP zero checksums and v4 to v6 translators

Marshall Eubanks <tme@americafree.tv> Tue, 28 July 2009 07:57 UTC

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From: Marshall Eubanks <tme@americafree.tv>
To: Lars Eggert <lars.eggert@nokia.com>
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Date: Tue, 28 Jul 2009 03:57:10 -0400
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Cc: 6man 6man <ipv6@ietf.org>, Behave WG <behave@ietf.org>
Subject: Re: [BEHAVE] UDP zero checksums and v4 to v6 translators
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On Jul 28, 2009, at 2:24 AM, Lars Eggert wrote:

> Hi,
>
> On 2009-7-27, at 18:46, Rémi Després wrote:
>> A simple solution would IMHO be to complement to the UDP rule in IPv6
>> as follows:
>> - IPv6 hosts MUST create UDP datagrams with non-zero checksums.
>> (Nothing new here.)
>> - IPv6 hosts SHOULD accept UDP datagrams with zero checksum.
>> (Application of the classic principle "be strict in what you send,
>> tolerant in what you receive").
>> - IPv4 to IPv6 translators that receive UDP datagrams having zero
>> checksums MAY keep these checksums in translated datagrams.
>
> as an individual, I prefer something along the lines of draft- 
> fairhurst-6man-tsvwg-udptt instead.
>

This draft and http://tools.ietf.org/html/draft-eubanks-chimento-6man-00

are still open and will be discussed at the 6man meeting Wednesday.

Basically, one prescribes no checksum for the "outer" packet in
IPv6 encapsulations, the other a fixed checksum per flow.

I would urge people interested in this to attend as a decision may be  
made soon.

Regards
Marshall




> Lars 
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