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Re: RFC4291bis

Brian E Carpenter <brian.e.carpenter@gmail.com> Wed, 08 August 2018 01:31 UTC

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Subject: Re: RFC4291bis
To: Michael Richardson <mcr+ietf@sandelman.ca>, "Manfredi (US), Albert E" <albert.e.manfredi@boeing.com>
Cc: 6man <ipv6@ietf.org>
References: <f332beb5-2ee5-c12e-b2b5-d7b1742e4ca0@gmail.com> <3068537452834bab9bc716f4ae775946@XCH15-01-07.nw.nos.boeing.com> <29684.1533689339@localhost>
From: Brian E Carpenter <brian.e.carpenter@gmail.com>
Message-ID: <4bbd3fc5-928f-bdc2-3ace-6c41b8d68f52@gmail.com>
Date: Wed, 08 Aug 2018 13:31:27 +1200
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On 08/08/2018 12:48, Michael Richardson wrote:
>>>>>> ipv6  <<ipv6-bounces@ietf.org> On Behalf Of Brian E Carpenter> writes:
> Manfredi (US), Albert E <albert.e.manfredi@boeing.com> wrote:
>     > Interface Identifiers for stateless address autoconfiguration
>     > are 64 bits long. Otherwise, IIDs are normally 64 bits long, except
>     > if the first three bits of the address are 000, or when the addresses
>     > are manually configured, or by exceptions defined in standards track
>     > documents. ... [Rest same as before.]
> 
>     > I'm not sure if there's any reason to mention that these rules only apply to the 2000 prefix.
> 
> I think that they apply to fe80::, ULAs, 3ffe::, and would be the default for
> 4000::/8, ... until we wrote something else down.  That's why we are saying, !0000::/8

Yes. My main concern about the non-2000/3 prefixes is that
we left them in limbo rather than "reserved". Fortunately
IANA has marked them as reserved anyway.

    Brian

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