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

Peter Hessler <phessler@theapt.org> Wed, 14 June 2017 09:40 UTC

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Date: Wed, 14 Jun 2017 11:40:34 +0200
From: Peter Hessler <phessler@theapt.org>
To: ipv6@ietf.org
Subject: Re: draft-bourbaki-6man-classless-ipv6-00
Message-ID: <20170614094034.GC30896@gir.theapt.org>
References: <E02C4C99-155A-4358-A845-F00F8BB071C1@employees.org> <b3ca5271-21b1-ab33-2dff-82735ebe9128@gmail.com> <235143da452c4ff4aec39a26ba918e7e@XCH15-06-11.nw.nos.boeing.com> <1489a50a-2616-f9ac-4109-16c595e15f90@gmail.com> <FA3032F9-F44B-45B4-9AFF-01EBC84F1448@employees.org> <b1c5c13d-ef69-ef30-546c-9178a2655caf@si6networks.com> <391c730c-fa75-7596-bb6b-383ea6583131@gmail.com> <0b57c999-b5df-8a44-e3fd-55cee628f3f3@si6networks.com> <20170614092327.GB30896@gir.theapt.org> <E61AFFF1-0354-41EE-8E11-50433B26BAF7@employees.org>
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On 2017 Jun 14 (Wed) at 11:35:23 +0200 (+0200), otroan@employees.org wrote:
:Peter,
:
:> :* Mandate fe80::/64 for link-local
:> :* RECOMMENDED /64 for subnets
:> :* Make SLAAC implementations flexible so that they could do SLAAC if a
:> :non-64 PIO is advertised.
:> 
:> As someone who is on the "/64 is the devil" side, I am perfectly happy
:> with the above.
:
:Reason being?
:
:Ole

link-local simply doesn't matter.  since it is on the link, we already
know the mac address and privacy won't help.  it's a silly place, with
silly rules. leave it at /64, so we don't have to fight with it.

leaving a RECOMMENDED for /64 subnets is fine.  forcing it to be a MUST
is not fine to me.  While the arguments in favour of /64 subnets are
valid, there are many differently valid reasons to have non-/64 subnets,
as mentioned many times in this (and other recent) threads.

As mentioned, there is a plen field in SLAAC advertisements, so we
should be able to use them.


-- 
I call them as I see them.  If I can't see them, I make them up.
		-- Biff Barf

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