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Re: Fwd: New Version Notification for draft-troan-6man-universal-ra-option-03.txt

Lorenzo Colitti <lorenzo@google.com> Wed, 07 October 2020 13:38 UTC

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From: Lorenzo Colitti <lorenzo@google.com>
Date: Wed, 07 Oct 2020 22:38:15 +0900
Message-ID: <CAKD1Yr2LrKw65LWviNVxBk47Bfm2ondkfh4=1-ztQZb9h_forQ@mail.gmail.com>
Subject: Re: Fwd: New Version Notification for draft-troan-6man-universal-ra-option-03.txt
To: Philip Homburg <pch-ipv6-ietf-6@u-1.phicoh.com>
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On Wed, Oct 7, 2020 at 9:47 PM Philip Homburg <
pch-ipv6-ietf-6@u-1.phicoh.com> wrote:

> A new RA (or DHCP) option has two aspects: syntax and semantics. What this
> draft does is introduce a more complex low level syntax for RA and DHCP
> options. I.e., the relatively simple, fixed length fields in RA and DHCP
> options are replaced with a generic, compressed, self-describing format.
> [...]
> Beyond that, encoding options in CBOR does nothing for the semantics of
> an option. And it seems to me that most of the discussion is regarding
> semantics.
>

+1. Defining an RA (or DHCP, or whatever) option is not just about defining
the syntax. That's actually the easy part. It's about defining the
semantics of the option, and what behaviour should occur in response by
hosts and routers. The reasons this is important are the same reasons we
have all standards: interoperability, vendor independence, ability to
engineer networks based on expected behaviour instead of building them
empirically around implementation behaviour, etc.

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