Re: IID length text
Brian E Carpenter <brian.e.carpenter@gmail.com> Mon, 16 January 2017 22:23 UTC
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Subject: Re: IID length text
To: sarikaya@ieee.org, Alexandre Petrescu <alexandru.petrescu@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> <82245ef2-cd34-9bd6-c04e-f262e285f983@gmail.com> <m2d1frhjfn.wl-randy@psg.com> <18e6e13c-e605-48ff-4906-2d5531624d64@gmail.com> <CAKD1Yr1cvZ8Y3+bHeML=Xwqr+YgDspZGnZi=jqQj4qe2kMc4zw@mail.gmail.com> <m2lguffnco.wl-randy@psg.com> <CAKD1Yr1TrTiPRdyutobmb_77XJ7guNzLrg=H_p7qi4BfQ8V=GA@mail.gmail.com> <m2d1frfm6m.wl-randy@psg.com> <CAKD1Yr2Njjd8_Mr+6TRFF6C5pdcX4yFgpFVyEkykDuytu2B8mg@mail.gmail.com> <2A5073777007277764473D78@PSB> <4596c3d4-a337-f08e-7909-f14270b7085f@gmail.com> <CAN-Dau06R3iYRpYLADhvHox4C9qdsJCuxFsJapRhOQcWT4qk_g@mail.gmail.com> <CAO42Z2weZcoHiBzN94QAQ9WGhWR16PmMMFNg=5YLmr_dhPjjpA@mail.gmail.com> <fcf580ec-3617-ca5f-5337-37acb6e928ba@gmail.com> <32121fe2-85d5-4849-d77d-edda5825d8e7@gmail.com> <CAC8QAccN_=x9sTgTM71XFSYfUmSyaMHw_tFEw2QSr5iwi2wcGw@mail.gmail.com>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Organization: University of Auckland
Message-ID: <94dffda9-0a88-cfa1-6281-5d788a7ca121@gmail.com>
Date: Tue, 17 Jan 2017 11:23:47 +1300
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On 17/01/2017 09:42, Behcet Sarikaya wrote: > On Mon, Jan 16, 2017 at 2:27 PM, Alexandre Petrescu > <alexandru.petrescu@gmail.com> wrote: >> Le 14/01/2017 à 20:49, Brian E Carpenter a écrit : >>> >>> A modest suggestion: >>> >>> OLD >>> 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]. >>> >>> NEW >>> IPv6 routing is based on prefixes of any valid length up to 128 >>> [BCP198]. >>> For example, [RFC6164] standardises 127 bit prefixes on point-to-point >>> links. However, consistent use of Stateless Address Autoconfiguration >>> (SLAAC)[RFC4862] requires that all interfaces on a link use the same >>> length >>> of Interface ID. In practice, this means that to guarantee >>> interoperability >>> of SLAAC, a fixed length of Interface ID is necessary. For all >>> currently >>> allocated unicast addresses, except those that start with the binary >>> value 000, that length is 64 bits. Note that this value is an arbitrary >>> choice and might be changed for some future allocation of unicast >>> address >>> space. Background on the 64 bit boundary in IPv6 addresses can be found >>> in [RFC7421]. >> >> >> I agree with the change suggestion. The new text and references are enough >> motivation to clarify that that 64bit limit is an arbitrary choice and might >> change in the future. >> > > 3GPP assigns 64 bit prefixes to each UE. > Extended Unique Identifiers defined are EUI-48 and EUI-64. > I don't think 64 bit limit is that arbitrary? It's a parameter, which we happened to set initially to 48 and then changed to 64 because of FireWire. I don't know why 3GPP chose the same value. But indeed we (the IETF) chose it because of our now old-fashioned decision to copy Novell Netware by embedding layer 2 addresses in layer 3. A bad choice, as it turned out. The first two definitions of "arbitrary" in Merriam-Webster seem to fit, especially the second. "existing or coming about seemingly at random or by chance or as a capricious and unreasonable act of will" "based on or determined by individual preference or convenience rather than by necessity or the intrinsic nature of something" Regards Brian > > Behcet > >> Alex >> >>> >>> Regards >>> Brian >>> >>> -------------------------------------------------------------------- >>> IETF IPv6 working group mailing list >>> ipv6@ietf.org >>> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 >>> -------------------------------------------------------------------- >>> >> >> -------------------------------------------------------------------- >> IETF IPv6 working group mailing list >> ipv6@ietf.org >> Administrative Requests: https://www.ietf.org/mailman/listinfo/ipv6 >> -------------------------------------------------------------------- >> > . >
- 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
- IID length text [was Re: Review of draft-ietf-6ma… Brian E Carpenter
- Re: IID length text [was Re: Review of draft-ietf… Mark Smith
- Re: Review of draft-ietf-6man-rfc4291bis-06 Lorenzo Colitti
- Re: IID length text [was Re: Review of draft-ietf… Lorenzo Colitti
- Re: Review of draft-ietf-6man-rfc4291bis-06 Erik Kline
- Re: Review of draft-ietf-6man-rfc4291bis-06 Randy Bush
- Re: IID length text [was Re: Review of draft-ietf… Brian E Carpenter
- Re: IID length text Alexandre Petrescu
- Re: IID length text [was Re: Review of draft-ietf… Fernando Gont
- Re: IID length text Behcet Sarikaya
- Re: IID length text [was Re: Review of draft-ietf… Fernando Gont
- Re: IID length text Fernando Gont
- Re: IID length text Behcet Sarikaya
- Re: IID length text [was Re: Review of draft-ietf… Brian E Carpenter
- Re: IID length text Fernando Gont
- Re: IID length text Brian E Carpenter
- Re: IID length text [was Re: Review of draft-ietf… Lorenzo Colitti
- Re: IID length text Lorenzo Colitti
- Re: IID length text Brian E Carpenter
- Re: IID length text Lorenzo Colitti
- Re: IID length text [was Re: Review of draft-ietf… Erik Kline
- Re: IID length text Brian E Carpenter
- Re: IID length text [was Re: Review of draft-ietf… Erik Kline
- Re: IID length text [was Re: Review of draft-ietf… Brian E Carpenter
- Re: IID length text [was Re: Review of draft-ietf… David Farmer
- Re: IID length text [was Re: Review of draft-ietf… Lorenzo Colitti
- Re: IID length text [was Re: Review of draft-ietf… David Farmer
- Re: IID length text [was Re: Review of draft-ietf… David Farmer
- Re: IID length text [was Re: Review of draft-ietf… otroan
- Re: IID length text [was Re: Review of draft-ietf… David Farmer
- Re: IID length text [was Re: Review of draft-ietf… Tim Chown
- Re: IID length text Behcet Sarikaya
- Re: IID length text [was Re: Review of draft-ietf… Fred Baker
- Re: IID length text Fernando Gont
- Re: IID length text Behcet Sarikaya
- Re: IID length text [was Re: Review of draft-ietf… otroan
- Unclear text [was IID length text [was Re: Review… Brian E Carpenter
- Re: IID length text [was Re: Review of draft-ietf… Brian E Carpenter
- RE: IID length text [was Re: Review of draft-ietf… Manfredi, Albert E
- Re: IID length text Fernando Gont
- Re: Unclear text [was IID length text [was Re: Re… Fernando Gont
- Re: IID length text [was Re: Review of draft-ietf… Fernando Gont
- Re: IID length text [was Re: Review of draft-ietf… Lorenzo Colitti
- Re: IID length text [was Re: Review of draft-ietf… Lorenzo Colitti
- Re: IID length text [was Re: Review of draft-ietf… Timothy Winters
- Re: IID length text [was Re: Review of draft-ietf… otroan
- Re: Unclear text [was IID length text [was Re: Re… otroan
- Re: IID length text Behcet Sarikaya
- Re: IID length text [was Re: Review of draft-ietf… David Farmer
- Re: IID length text [was Re: Review of draft-ietf… james woodyatt
- Re: IID length text [was Re: Review of draft-ietf… 神明達哉
- Updated IID length text Brian E Carpenter
- RE: Updated IID length text Manfredi, Albert E
- RE: Updated IID length text Manfredi, Albert E
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Brian E Carpenter
- RE: Updated IID length text Manfredi, Albert E
- RE: Updated IID length text Manfredi, Albert E
- Re: Updated IID length text Fernando Gont
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Fernando Gont
- Re: Updated IID length text Fernando Gont
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Fernando Gont
- Re: Updated IID length text Fernando Gont
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Alexandre Petrescu
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Alexandre Petrescu
- Re: IID length text [was Re: Review of draft-ietf… Sander Steffann
- Re: Updated IID length text Brian E Carpenter
- Re: Updated IID length text Brian E Carpenter
- Re: Updated IID length text Brian E Carpenter
- RE: Updated IID length text Manfredi, Albert E
- RE: Updated IID length text Manfredi, Albert E
- Re: Updated IID length text Alexandre Petrescu
- RE: Updated IID length text Templin, Fred L
- Re: Updated IID length text Mark Andrews
- Re: IID length text [was Re: Review of draft-ietf… David Farmer
- Re: Updated IID length text Brian E Carpenter
- Re: Updated IID length text Brian E Carpenter
- Re: Updated IID length text David Farmer
- Re: Updated IID length text Brian E Carpenter
- Re: Review of draft-ietf-6man-rfc4291bis-06 Suresh Krishnan
- Re: IID length text Suresh Krishnan
- Re: Updated IID length text Suresh Krishnan
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Brian E Carpenter
- Re: Updated IID length text David Farmer
- Re: Updated IID length text Lorenzo Colitti
- Re: Updated IID length text Brian E Carpenter
- Re: Updated IID length text David Farmer
- Re: Updated IID length text otroan
- Re: IID length text [was Re: Review of draft-ietf… otroan
- Re: Updated IID length text otroan
- Re: Updated IID length text otroan
- RE: IID length text [was Re: Review of draft-ietf… Manfredi, Albert E
- Re: Updated IID length text Brian E Carpenter
- Re: Updated IID length text Bob Hinden
- Re: Updated IID length text Brian E Carpenter
- Re: Updated IID length text otroan
- Re: Updated IID length text otroan
- Re: IID length text [was Re: Review of draft-ietf… Tore Anderson
- Re: IID length text [was Re: Review of draft-ietf… Lorenzo Colitti
- Re: IID length text [was Re: Review of draft-ietf… Tore Anderson
- Re: IID length text sthaug
- Re: IID length text Brian E Carpenter
- Re: Updated IID length text Bob Hinden
- Re: Updated IID length text Suresh Krishnan