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Re: I-D Action: draft-carpenter-6man-lap-00.txt

Lorenzo Colitti <lorenzo@google.com> Wed, 13 June 2018 15:21 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Thu, 14 Jun 2018 00:20:50 +0900
Message-ID: <CAKD1Yr3s3=0SvrDXPXMUdpU7Xs70RxgAQaWoyZHDJWceT3zhkQ@mail.gmail.com>
Subject: Re: I-D Action: draft-carpenter-6man-lap-00.txt
To: Nick Hilliard <nick@foobar.org>
Cc: "Brian E. Carpenter" <brian.e.carpenter@gmail.com>, IETF IPv6 Mailing List <ipv6@ietf.org>
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On Wed, Jun 13, 2018 at 8:16 PM Nick Hilliard <nick@foobar.org> wrote:

> > This is because there will be participants that claim that the prefix
> > length for address assignment is already clearly defined in RFC 4291 as
> > being "64 bits long",
>
> I can't see this in RFC 4291.  Are you mixing up address assignment and
> interface ID?
>

RFC 4291 says that IPv6 addresses are composed of n-bit subnet prefixes and
128-n bit interface IDs. Then it says that for pretty much all unicast
addresses 128-n=64. Thus, n=64.

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