Re: Status of the "u" bit for privacy extensions

Brian E Carpenter <brian.e.carpenter@gmail.com> Tue, 18 February 2014 21:22 UTC

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Date: Wed, 19 Feb 2014 10:22:29 +1300
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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To: Florent Fourcot <ietf@flo.fourcot.fr>
Subject: Re: Status of the "u" bit for privacy extensions
References: <53032F9D.50203@flo.fourcot.fr> <53035F12.6090208@si6networks.com> <5303AF2E.3090701@flo.fourcot.fr>
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Cc: Fernando Gont <fgont@si6networks.com>, 6man@ietf.org
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On 19/02/2014 08:06, Florent Fourcot wrote:
>>> Should current implementations following this rule to be updated? What is
>>> the current rule for this?
>> Strictly speaking, I'd say that, since RFC4941 has not been updated in
>> this respect, if you comply with RFC4941, you should use the old semantics.
>>
> 
>> That said, in the light of RFC7136, it would probably make sense to use
>> the semantics in RFC7136.
>>
> 
> 
> Thanks Fernando. I'm afraid, it will probably not enough convincing for
> Linux kernel developers to change the current behaviour.

I don't see a problem. We tried to be careful in RFC7136 not to break
or even theoretically invalidate any current code. The document that
would ask for a change is draft-ietf-6man-default-iids, if approved.
But even so, it would not break any running code.

(Personal comment: breaking running code would be a really silly
thing for the IETF to do at this stage in the life of IPv6.)

    Brian