Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt> (Internet Protocol, Version 6 (IPv6) Specification) to Internet Standard

Erik Kline <ek@google.com> Mon, 27 February 2017 03:47 UTC

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From: Erik Kline <ek@google.com>
Date: Mon, 27 Feb 2017 12:47:16 +0900
Message-ID: <CAAedzxqp06F6HNsr9_-pmWknUGZZy0exhTHc75pd2n4LG4Y2ww@mail.gmail.com>
Subject: Re: Last Call: <draft-ietf-6man-rfc2460bis-08.txt> (Internet Protocol, Version 6 (IPv6) Specification) to Internet Standard
To: Fernando Gont <fgont@si6networks.com>
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Cc: draft-ietf-6man-rfc2460bis@ietf.org, IETF IPv6 Mailing List <ipv6@ietf.org>, IETF Discussion <ietf@ietf.org>, Suresh Krishnan <suresh.krishnan@ericsson.com>, 6man-chairs@ietf.org
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On 26 February 2017 at 22:05, Fernando Gont <fgont@si6networks.com>; wrote:

> On 02/26/2017 09:55 AM, Sander Steffann wrote:
> > Hi,
> >
> >> 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.
>
> Wasn't there at some point an I-D aiming to clarify what "global" meant?
> -- IIRC, authored by Brian et al.
>

https://tools.ietf.org/html/draft-carpenter-6man-whats-global