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

Alexandre Petrescu <alexandru.petrescu@gmail.com> Mon, 05 June 2017 09:53 UTC

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From: Alexandre Petrescu <alexandru.petrescu@gmail.com>
X-Google-Original-From: Alexandre Petrescu <alexandre.petrescu@gmail.com>
Subject: Re: draft-bourbaki-6man-classless-ipv6-00
To: 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>
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Date: Mon, 05 Jun 2017 11:53:51 +0200
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Le 04/06/2017 à 13:05, Philip Homburg a écrit :
[...]
> Moving on to a network architecture point of view, when using pseudo
>  random IIDs there will be a longest prefix that can be supported.
> Lets say for the sake of argument we can support of /96.
>
> Then the effect will be that if in the future hosts support SLAAC
> upto /96 then we are back at the same hard limit. We have just moved
>  be boundary by 32 bits.

Similar worries were expressed.

However, as I read this draft it does not propose to substitute new hard 
limit for old hard limit.  The proposal is leave it at 'n', i.e. a variable.

The optimistic evolution of this could be that in some IP-over-foo this 
variable could be exceptionally /96 and largely over-ridden by a 
backward compatible /64.

Maybe something could be written down that clarifies this is not a
proposal to substitute new hard limit for old hard limit.

Alex

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