Re: Review of draft-ietf-6man-rfc4291bis-06
Brian E Carpenter <brian.e.carpenter@gmail.com> Fri, 13 January 2017 00:29 UTC
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Subject: Re: Review of draft-ietf-6man-rfc4291bis-06
To: Randy Bush <randy@psg.com>, Bob Hinden <bob.hinden@gmail.com>
References: <148406593094.22166.2894840062954191477.idtracker@ietfa.amsl.com> <m2fukqbbwv.wl-randy@psg.com> <F6953234-3F85-4E28-9861-433ADD01A490@gmail.com> <m2wpdzhncn.wl-randy@psg.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
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Date: Fri, 13 Jan 2017 13:29:21 +1300
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Cc: int-dir@ietf.org, IPv6 List <ipv6@ietf.org>, draft-ietf-6man-rfc4291bis.all@ietf.org, IETF <ietf@ietf.org>
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On 13/01/2017 12:26, Randy Bush wrote: >>> but i am having a hard time reconciling 2.4.4's insistence on a >>> mandatory 64-bit uuid in all unicast global addresses with 2.4.0, rfc >>> 6141, widespread operational practice, ... clue bat please. >> >> This was discussed extensively in 6MAN and resulted in RFC7421 >> "Analysis of the 64-bit Boundary in IPv6 Addressing”. The text in >> rfc4291bis is: >> >> For all unicast addresses, except those that start with the binary >> value 000, Interface IDs are required to be 64 bits long. >> Background on the 64 bit boundary in IPv6 addresses can be found in >> [RFC7421]. > > thanks for the review that the wg came to this decision in conflict with > operational practice and its own statement in 2.4.0. i did read the > documents. > > since it is incorrect, ietf last call seems to be the time to fix it. > > to be clear, i have no problem with iids being 64-bit. my issue is with > unicast globals being classful in 2.4.4. RFC7421 (which is Informational) calls out RFC 6164 (not 6141!) as an exception. To be precise it says: The de facto length of almost all IPv6 interface identifiers is therefore 64 bits. The only documented exception is in [RFC6164], which standardizes 127-bit prefixes for point-to-point links between routers, among other things, to avoid a loop condition known as the ping-pong problem. I would suggest adding a similar exception statement in 4291bis. Brian
- Review of draft-ietf-6man-rfc4291bis-06 Brian Haberman
- Re: Review of draft-ietf-6man-rfc4291bis-06 Bob Hinden
- Re: Review of draft-ietf-6man-rfc4291bis-06 Randy Bush
- Re: Review of draft-ietf-6man-rfc4291bis-06 Punana Lebo
- Re: Review of draft-ietf-6man-rfc4291bis-06 Brian Haberman
- Re: Review of draft-ietf-6man-rfc4291bis-06 Bob Hinden
- Re: Review of draft-ietf-6man-rfc4291bis-06 Bob Hinden
- Re: Review of draft-ietf-6man-rfc4291bis-06 Bob Hinden
- Re: Review of draft-ietf-6man-rfc4291bis-06 Randy Bush
- Re: Review of draft-ietf-6man-rfc4291bis-06 Brian E Carpenter
- Re: Review of draft-ietf-6man-rfc4291bis-06 David Farmer
- Re: Review of draft-ietf-6man-rfc4291bis-06 Randy Bush
- Re: Review of draft-ietf-6man-rfc4291bis-06 Randy Bush
- Re: Review of draft-ietf-6man-rfc4291bis-06 Brian E Carpenter
- Re: Review of draft-ietf-6man-rfc4291bis-06 Lorenzo Colitti
- Re: Review of draft-ietf-6man-rfc4291bis-06 heasley
- Re: Review of draft-ietf-6man-rfc4291bis-06 Suresh Krishnan
- AW: Review of draft-ietf-6man-rfc4291bis-06 Karsten Thomann
- Re: Review of draft-ietf-6man-rfc4291bis-06 Randy Bush
- Re: Review of draft-ietf-6man-rfc4291bis-06 Randy Bush
- Re: Review of draft-ietf-6man-rfc4291bis-06 sthaug
- Re: Review of draft-ietf-6man-rfc4291bis-06 Lorenzo Colitti
- Re: Review of draft-ietf-6man-rfc4291bis-06 Randy Bush
- Re: Review of draft-ietf-6man-rfc4291bis-06 Lorenzo Colitti
- Re: AW: Review of draft-ietf-6man-rfc4291bis-06 Brian E Carpenter
- Re: Review of draft-ietf-6man-rfc4291bis-06 Fernando Gont
- Re: Review of draft-ietf-6man-rfc4291bis-06 Fernando Gont
- Re: Review of draft-ietf-6man-rfc4291bis-06 Brian E Carpenter
- Re: Review of draft-ietf-6man-rfc4291bis-06 heasley
- Re: Review of draft-ietf-6man-rfc4291bis-06 Mark Smith
- Re: Review of draft-ietf-6man-rfc4291bis-06 Fernando Gont
- Re: Review of draft-ietf-6man-rfc4291bis-06 John C Klensin
- Re: Review of draft-ietf-6man-rfc4291bis-06 Brian E Carpenter
- Re: Review of draft-ietf-6man-rfc4291bis-06 David Farmer
- Re: Review of draft-ietf-6man-rfc4291bis-06 Mark Smith
- Re: Review of draft-ietf-6man-rfc4291bis-06 Brian E Carpenter
- Re: Review of draft-ietf-6man-rfc4291bis-06 Lorenzo Colitti