Re: IID length text [was Re: Review of draft-ietf-6man-rfc4291bis-06]
Fernando Gont <fgont@si6networks.com> Mon, 16 January 2017 20:28 UTC
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Subject: Re: IID length text [was Re: Review of draft-ietf-6man-rfc4291bis-06]
To: Brian E Carpenter <brian.e.carpenter@gmail.com>, 6man <ipv6@ietf.org>
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>
From: Fernando Gont <fgont@si6networks.com>
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Date: Mon, 16 Jan 2017 16:59:30 -0300
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On 01/14/2017 04:49 PM, Brian E Carpenter wrote: > 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. fixed as "all nodes on the link use the same IID length" or as in "a hardcoded IID length, as the current 64 value"? If the former, I agree. If the later, I don't. The 64-bit length seems to have a lot to do with embedding MAC addresses (IIRC, the IID length was something like 48, but then changed to 64 in response to EUI-64). Certainly, if you generate IIDs by embedding some number which has constraints (as a MAC address), you need a fixed length. OTOH, if you select the IIDs from a stream of bits (as RFC7217 does), then you don't care about the length (other than "as many bits as necessary such that the host density is low, and hence collisions of IIDs are reduced). Thanks! Cheers, -- Fernando Gont SI6 Networks e-mail: fgont@si6networks.com PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492
- 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