Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard

Fred Baker <fredbaker.ietf@gmail.com> Mon, 13 February 2017 23:41 UTC

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Subject: Re: Last Call: <draft-ietf-6man-rfc4291bis-07.txt> (IP Version 6 Addressing Architecture) to Internet Standard
From: Fred Baker <fredbaker.ietf@gmail.com>
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Date: Mon, 13 Feb 2017 15:41:43 -0800
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To: Brian E Carpenter <brian.e.carpenter@gmail.com>
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Cc: 6man WG <ipv6@ietf.org>, IETF-Discussion Discussion <ietf@ietf.org>, Suresh Krishnan <suresh.krishnan@ericsson.com>, draft-ietf-6man-rfc4291bis@ietf.org, 6man-chairs@ietf.org
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> On Feb 13, 2017, at 2:53 PM, Brian E Carpenter <brian.e.carpenter@gmail.com>; wrote:
> 
> However, the Interface ID of unicast addresses used for
> Stateless Address Autoconfiguration [RFC4862] is required
> to be 64 bits long.

To my understanding, that is exactly the case with SLAAC. One could use the algorithm with any number one chose, but the chosen number is 64. Restricting the limitation to algorithms that require such a limitation makes sense to me. Extending it from there to algorithms that have no such limitation doesn't.