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

Brian E Carpenter <brian.e.carpenter@gmail.com> Tue, 06 June 2017 23:30 UTC

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Subject: Re: draft-bourbaki-6man-classless-ipv6-00
To: Lorenzo Colitti <lorenzo@google.com>
Cc: Ca By <cb.list6@gmail.com>, Philip Homburg <pch-ipv6-ietf-4@u-1.phicoh.com>, IETF IPv6 Mailing List <ipv6@ietf.org>
References: <20170602141112.x64nleqclygz7dwd@Vurt.local> <20170602141259.GD30896@gir.theapt.org> <CAKD1Yr0DtQYvCYLQexhXe_nhb5rjeyhnB4bCveqyO5Xbuwdg1A@mail.gmail.com> <CAKFn1SEdjhsQ3tKPZdbdfF4ArDzw-FZfjQT68gV55Fc-5vzBvw@mail.gmail.com> <CAKD1Yr3ppM0UF8HoN8PgS7F0iEmK26ebiuJK=tkAdZnuLWpkZg@mail.gmail.com> <CAKFn1SHASt34ihJmGN0iRFQQzLTMspZfxXHgBjBatXXcRYF4cw@mail.gmail.com> <20170604093119.nt733rb3ymmjssww@Vurt.local> <m1dHTLx-0000DcC@stereo.hq.phicoh.net> <CAKD1Yr0ZZwRar6D-2bkXBKPYehqqW99+BMtDOjyovR8WDXKzxw@mail.gmail.com> <CAD6AjGTjikAWutcenW8qn7OW8kPM9c_x_yDUy5vQxJmXKL85dg@mail.gmail.com> <91c3c0f4-eb8b-cdf7-b9c9-7d1eecb7fe64@gmail.com> <CAKD1Yr0_WR_TB+OC0U1Qt2h6WzUp9EGvrqC1ZKW2mwFeBd3bCQ@mail.gmail.com> <4021a559-5b6d-b3fb-19cd-afbe9041e8f2@gmail.com> <CAKD1Yr1wmY3O9Uxe=KRxzCidpyhn3e0zSnikY0K6LK9ue4OzwA@mail.gmail.com> <71c7286c-0e86-5dbe-f9c2-7d473d1de728@gmail.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Wed, 07 Jun 2017 11:30:23 +1200
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Just to be clear...
On 07/06/2017 11:24, Brian E Carpenter wrote:
> On 06/06/2017 19:48, Lorenzo Colitti wrote:
>> On Tue, Jun 6, 2017 at 7:25 AM, Brian E Carpenter <
>> brian.e.carpenter@gmail.com> wrote:
>>
>>> The parameter's *current* value, yes. But should we really be fixing
>>> the value of the parameter once and for all in the addressing architecture?
>>> Why don't we fix it in each IPv6-over-foo, which is what the SLAAC design
>>> assumes?
>>>
>>
>> If that is the authors' goal, then what the draft should say is that the
>> IID length is 64 unless otherwise specified by an IPv6-over-foo layer.
> 
> As Ole quoted, it says:

I meant that it says this in a too complicated way,
not in those exact words.
 
> "Interface Identifiers should be 64 bit long except
> when the addresses are manually configured, or by exceptions defined
> in standards track documents."
> 
> Maybe there are too many other words?
> 
>> That is not what the draft says today.
> 
> The difference is the "manually configured" option. I don't see
> how we can forbid that.
> 
>     Brian
> 
>>
>> I also suspect it's not the authors' goal. At least Randy and Job have
>> clearly stated that what they want to do is run non-/64 prefixes on today's
>> links (Ethernet, maybe wifi), not on some future link layer.
>>