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

Randy Bush <randy@psg.com> Fri, 13 January 2017 07:09 UTC

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Date: Fri, 13 Jan 2017 16:08:55 +0900
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From: Randy Bush <randy@psg.com>
To: Lorenzo Colitti <lorenzo@google.com>
Subject: Re: Review of draft-ietf-6man-rfc4291bis-06
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> So while Randy may well be right that we will move away from classful
> eventually

that is the line i was fed 15+ years ago.  i did not accept it then and
i see no good reason to accept it now.

> we certainly never had it in the top 64 bite of the address

bzzt!  you may want to look at rfc 2450.

> For now, I'd much prefer to just add a similar exception to the one we
> have in 7421.

you'll need to start an iana registry.  for p2p some use /127, some
/126, and i have seen /120 on a multipoint mesh, worked fine.

we have had to fight massively with vendors to make it classless.
please do not give them excuses to break things.

randy

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