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Re: IPv6 prefix lengths - how long?

David Farmer <farmer@umn.edu> Mon, 10 June 2019 18:02 UTC

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From: David Farmer <farmer@umn.edu>
Date: Mon, 10 Jun 2019 13:02:20 -0500
Message-ID: <CAN-Dau1fY=pUjSJMic8-OofkUjED6HyTinwH=Boq4FiHwO7nvA@mail.gmail.com>
Subject: Re: IPv6 prefix lengths - how long?
To: "Templin (US), Fred L" <Fred.L.Templin@boeing.com>
Cc: IPv6 IPv6 List <ipv6@ietf.org>
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On Mon, Jun 10, 2019 at 11:54 AM Templin (US), Fred L <
Fred.L.Templin@boeing.com> wrote:

> Point 2) I am not as sure on. Why is it important for prefixes to land on
> even nibble
> boundaries? I can easily delegate a /63 today for example, and I don't see
> anything
> wrong with that. Are we saying that that should be disallowed?
>

No, not disallowed, nibble alignment is not required, it is simply
recommended. Nibble alignment just makes it easier for humans to understand
and recognize the boundary. Making things easier for humans to recognize
makes it more likely they will catch their mistakes, and less likely they
will make mistakes.

Thanks.
-- 
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David Farmer               Email:farmer@umn.edu
Networking & Telecommunication Services
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