Re: [v6ops] draft-moreiras-v6ops-rfc3849bis-00

Mark Andrews <marka@isc.org> Tue, 13 August 2013 01:12 UTC

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To: "Antonio M. Moreiras" <moreiras@nic.br>
From: Mark Andrews <marka@isc.org>
References: <5207D42F.2030302@nic.br> <5207E319.6070601@nic.br> <B66D2D0C-DE6D-49CC-A87A-7C65B5360DB4@delong.com> <52082128.5090503@nic.br> <C7478DBE-5F73-442B-B773-D1B2CF7E0935@delong.com> <20130812220733.C5E993845404@drugs.dv.isc.org> <5209628C.90104@nic.br>
In-reply-to: Your message of "Mon, 12 Aug 2013 19:32:44 -0300." <5209628C.90104@nic.br>
Date: Tue, 13 Aug 2013 11:12:00 +1000
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Cc: Alejandro Acosta <aacosta@rocketmail.com>, v6ops@ietf.org
Subject: Re: [v6ops] draft-moreiras-v6ops-rfc3849bis-00
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In message <5209628C.90104@nic.br>br>, "Antonio M. Moreiras" writes:
> On 12/08/13 19:07, Mark Andrews wrote:
> > In message <C7478DBE-5F73-442B-B773-D1B2CF7E0935@delong.com>om>, Owen DeLong writes:
> >>
> >> On Aug 11, 2013, at 16:41 , Antonio M. Moreiras <moreiras@nic.br> wrote:
> >>
> >>> On 11/08/13 19:29, Owen DeLong wrote:
> >>>> I support the idea. It might be worth also asking for a ULA Doc slice at the same time.
> >>>> I think a /48 is probably sufficient for most ULA examples.
> >>>>
> >>>> But I think it would be good to be able to write up ULA examples and training that use
> >>>> actual ULA prefixes intended for documentation.
> >>>
> >>> I agree. An organization could generate an ULA prefix specifically to
> >>> use in a course, or document. But it could be copied and used in
> >>> production environments. This would break the "global uniqueness", and
> >>> could lead to other problems. It would be nice to have a specific ULA
> >>> documentation prefix.
> >>>
> >>> I would suggest a prefix with the L bit cleared, easy to remember, and
> >>> maybe slightly shorter than /48. For example FC00:0:D0C0::/44.
> >>>
> >>> []s
> >>> Moreiras.
> >>
> >> That would certainly be an acceptable solution as far as I am concerned.
> > 
> > So you would use a Centrally Assigned ULA to document Locally Assigned ULAs?
> > What are you smoking today?  The is a BIG NOOOOOOOOOOOOOOOOOOOO!!!!!!!!!!
> 
> Why not? The use cases for Locally Assigned ULAs, and Centrally Assigned
> ULA are the same. Asking IANA to assign an ULA prefix to a specific use
> (documentation) would not be, by definition, a central assignment?

Actually the use cases are different.  One you have a risk of collision
when combining nets, the other you don't if assignments are done
correctly.  One you can't publish safely in the global DNS using AAAA,
the other you can.  etc.
 
Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka@isc.org