Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt> (Internet Protocol, Version 6 (IPv6) Specification) to Internet Standard
Fernando Gont <fgont@si6networks.com> Sun, 26 February 2017 14:04 UTC
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Subject: Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt> (Internet Protocol, Version 6 (IPv6) Specification) to Internet Standard
To: Sander Steffann <sander@steffann.nl>
References: <148599296506.18647.12389618334616420462.idtracker@ietfa.amsl.com> <6dbbbf7d-b3b8-0fbc-c2a3-546472925893@si6networks.com> <9B712605-E180-4F33-806F-9DC5CBAD2E31@steffann.nl> <456cf6e5-a57b-8198-4261-1ff2c0dc1e1c@si6networks.com> <86D1EAA4-237B-46E0-A766-E2D181250695@steffann.nl>
From: Fernando Gont <fgont@si6networks.com>
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Date: Sun, 26 Feb 2017 11:03:54 -0300
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Cc: draft-ietf-6man-rfc2460bis@ietf.org, 6man WG <ipv6@ietf.org>, ietf <ietf@ietf.org>, 6man-chairs@ietf.org
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On 02/26/2017 10:24 AM, Sander Steffann wrote: >>>> 2.3. Address Type Identification >>>> >>>> The type of an IPv6 address is identified by the high-order >>>> bits of the address, as follows: >>>> >>>> Address type Binary prefix IPv6 notation >>>> Section ------------ ------------- ------------- >>>> ------- Unspecified 00...0 (128 bits) ::/128 >>>> 2.4.2 Loopback 00...1 (128 bits) ::1/128 >>>> 2.4.3 Multicast 11111111 ff00::/8 >>>> 2.6 Link-Local unicast 1111111010 fe80::/10 >>>> 2.4.6 Global Unicast (everything else) >>>> >>>> >>>> I wonder if this table should explicitly call out ULAs, and >>>> provide a reference to the corresponding section. >>> >>> ULAs are not an address type, they are Global Unicast. Adding >>> them here might confuse people. And if we include ULAs then there >>> is lots more that we should include as well. So while I >>> understand your question, I think it would be better not to. >> >> The "confusing" part is that, while globally unique, their scope is >> not really global -- i.e., they are not meant to be globally >> routable. > > Indeed, globally unique vs globally routable. But if you go into this > then it's more complicated than it seems. Whether something is > routable and where are an operational choice. Companies choosing to > interconnect might route each other's ULA space, while some of my > RIPE NCC allocated space is not routed anywhere public. It's > difficult to give a fixed definition that doesn't take operational > stuff into account. According to the definition of global scope in RFC4291, ULAs are not really global. If they were, an ULA address should be able to uniquely identify an interface in the whole (global) network. If anything, this only happens "statistically". In practice, sine 2001:db8::/16 is not routable, if your teaching a course you'll probably use ULAs for a virtual lab. And since you copy the same VMs to all attendees, they all end up using the same ULA addresses. Hence their scope (within which an interface is uniquely identified) will certainly not be global (multiple different interfaces employ the same address at the same timeframe). :-) Cheers, -- Fernando Gont SI6 Networks e-mail: fgont@si6networks.com PGP Fingerprint: 6666 31C6 D484 63B2 8FB1 E3C4 AE25 0D55 1D4E 7492
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- RE: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Manfredi, Albert E
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Stefano Previdi (sprevidi)
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… tom p.
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… C. M. Heard
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… 神明達哉
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Pete Resnick
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Suresh Krishnan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Pete Resnick
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… tom p.
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Enno Rey
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Enno Rey
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… John Leslie
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Mark Smith
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Randy Bush
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Sander Steffann
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Greg Skinner
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joe Touch
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joe Touch
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joe Touch
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joe Touch
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Pete Resnick
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Philip Homburg
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… 神明達哉
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Randy Bush
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Ted Lemon
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Randy Bush
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Scott Bradner
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Randy Bush
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Randy Bush
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Suresh Krishnan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Suresh Krishnan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Suresh Krishnan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Eric Vyncke (evyncke)
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Leddy, John
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Tal Mizrahi
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Mark Smith
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Mark Smith
- RE: [EXT] Re: Last Call: <draft-ietf-6man-rfc2460… Tal Mizrahi
- RE: [EXT] Re: Last Call: <draft-ietf-6man-rfc2460… David Mozes
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joel M. Halpern
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joel M. Halpern
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: [EXT] Re: Last Call: <draft-ietf-6man-rfc2460… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: [EXT] Re: Last Call: <draft-ietf-6man-rfc2460… Mark Smith
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joel M. Halpern
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Scott O. Bradner
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joel M. Halpern
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Joel M. Halpern
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Scott O. Bradner
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Stewart Bryant
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Alejandro Acosta
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Stewart Bryant
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… james woodyatt
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… otroan
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… C. M. Heard
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Philip Homburg
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… C. M. Heard
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… C. M. Heard
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Mark Andrews
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… heasley
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Sander Steffann
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Sander Steffann
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Fernando Gont
- Address types [was: Last Call: <draft-ietf-6man-r… Brian E Carpenter
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Erik Kline
- Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt… Alexandre Petrescu