Re: Objection to draft-ietf-6man-rfc4291bis-07.txt

Brian E Carpenter <brian.e.carpenter@gmail.com> Fri, 24 February 2017 19:48 UTC

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Subject: Re: Objection to draft-ietf-6man-rfc4291bis-07.txt
To: "Manfredi, Albert E" <albert.e.manfredi@boeing.com>, james woodyatt <jhw@google.com>
References: <20170223134026.GI5069@gir.theapt.org> <9277BC0B-04F3-4FC1-901E-F83A8F0E02D7@google.com> <58AF6429.70809@foobar.org> <902276E9-0521-4D4E-A42B-C45E64763896@google.com> <58AF726A.3040302@foobar.org> <F7C230DE-4759-4B78-ABF2-6799F85B3C62@google.com> <58B014F6.2040400@foobar.org> <6DA95097-8730-4353-A0C9-3EB4719EA891@google.com> <304f89c9ec7c4931b3d854ff1d24f912@XCH15-06-11.nw.nos.boeing.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
Message-ID: <a784a68a-7e0a-aa75-0466-75556847b91b@gmail.com>
Date: Sat, 25 Feb 2017 08:48:24 +1300
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Bert,
On 25/02/2017 08:10, Manfredi, Albert E wrote:
> From: ipv6 [mailto:ipv6-bounces@ietf.org] On Behalf Of james woodyatt
> 
>> I know there are operating systems with billions of units in the field
>> today that do exactly this because RFC 4291 and its predecessors have for
>> years given them clear license to do so, and I don’t want to see the
>> publication of I-D.ietf-6man-rfc4291bis as RFC come to remove this license
>> as a side effect of promoting IPv6 to full Standard category.
> 
> But this is exactly why RFC 4291-bis has to get this right. The unicast address space 2000::/3 is the only one that should be so constrained. We need to nip this problem in the bud.

I don't think that specific IANA-delegated prefixes belong in this document.
And a few weeks ago I suggested limiting the /64 rule to currently delegated
address space, and was loudly told "No!". What we need to get across
is the notion that this is a parameter, not a constant, and today's
setting of the parameter is 64. I strongly suspect that the document editor
has got that message and will come up with some new text.

    Brian