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Re: draft-bourbaki-6man-classless-ipv6-00

Lorenzo Colitti <lorenzo@google.com> Tue, 13 June 2017 08:18 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Tue, 13 Jun 2017 17:18:20 +0900
Message-ID: <CAKD1Yr0_AASvg0mGb+tEi4bKoF43FA7_MxhRLSHeniAKrj5t1A@mail.gmail.com>
Subject: Re: draft-bourbaki-6man-classless-ipv6-00
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Cc: Ole Troan <otroan@employees.org>, Fernando Gont <fgont@si6networks.com>, 6man WG <ipv6@ietf.org>
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On Sun, Jun 11, 2017 at 8:37 AM, Brian E Carpenter <
brian.e.carpenter@gmail.com> wrote:

> This has two aspects for me:
> 1) It's simply out of place to define an arbitrary constant
> in something called "architecture".
>

Er, what? It's perfectly fine to say that the address is 128 bits long, and
that half of it is assigned to the network and half to the link.


> 2) By defining it globally we forbid using some other value
> on a future link-layer where a different value might be better.
> A 'should' could cover that, of course, which is why I accept
> the current 4291bis text.
>

I don't see why we need new text for that. Any document that wants to use a
different value can simply update 4291.


> > I am still confused what this draft proposes to change.
>
> Nothing in any current implementation.


We have a popular implementation that only accepts 64-bit IID lengths in
certain cases. Are you proposing that our implementation change or not?

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