Re: Review of draft-ietf-6man-rfc4291bis-06

Randy Bush <randy@psg.com> Fri, 13 January 2017 00:50 UTC

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Date: Fri, 13 Jan 2017 09:50:36 +0900
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From: Randy Bush <randy@psg.com>
To: Brian E Carpenter <brian.e.carpenter@gmail.com>
Subject: Re: Review of draft-ietf-6man-rfc4291bis-06
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Cc: IPv6 List <ipv6@ietf.org>, int-dir@ietf.org, Bob Hinden <bob.hinden@gmail.com>, draft-ietf-6man-rfc4291bis.all@ietf.org, IETF <ietf@ietf.org>
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> RFC7421 (which is Informational) calls out RFC 6164 (not 6141!) as an exception.
> To be precise it says:
> 
>    The de facto length of almost all IPv6 interface identifiers is
>    therefore 64 bits.  The only documented exception is in [RFC6164],
>    which standardizes 127-bit prefixes for point-to-point links between
>    routers, among other things, to avoid a loop condition known as the
>    ping-pong problem.
> 
> I would suggest adding a similar exception statement in 4291bis.

and then next year we will go through another draft and have another
exception.  just get rid of classful addressing.  we went through this
in the '90s.

randy