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Re: <draft-ietf-6man-rfc4291bis-09.txt>

David Farmer <farmer@umn.edu> Sat, 08 July 2017 15:00 UTC

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From: David Farmer <farmer@umn.edu>
Date: Sat, 08 Jul 2017 10:00:08 -0500
Message-ID: <CAN-Dau1G4Rrio6bUrx+6EktzdBkDe49grSWpUB=VJUz0vN-J5A@mail.gmail.com>
Subject: Re: <draft-ietf-6man-rfc4291bis-09.txt>
To: Lorenzo Colitti <lorenzo@google.com>
Cc: Bob Hinden <bob.hinden@gmail.com>, IPv6 List <ipv6@ietf.org>
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On Sat, Jul 8, 2017 at 12:47 AM, Lorenzo Colitti <lorenzo@google.com> wrote:

> On Tue, Jul 4, 2017 at 5:22 AM, David Farmer <farmer@umn.edu> wrote:
>>
>>    Interface Identifiers are 64 bit long except if the first three bits
>>    of the address are 000, or when the addresses are manually
>>    configured, or by exceptions defined in standards track documents.
>>
>>
> I don't think we should say "by exceptions defined in standards track
> documents". Whatever document wants to allow non-64-bit prefixes should
> formally update RFC 4291. Anything else will be confusing for implementers.
>

Those are not my words, they were added in version 8 of RFC4291bis. I don't
like it either, but I think we have much different reasons. I think it is
much cleaner to recognize this is a recommendation, then you don't need to
enumerate the exceptions at all.

Thanks.

-- 
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David Farmer               Email:farmer@umn.edu
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