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Re: [homenet] Kathleen Moriarty's Discuss on draft-ietf-homenet-hncp-09: (with DISCUSS)

Carsten Bormann <cabo@tzi.org> Thu, 19 November 2015 07:03 UTC

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Date: Thu, 19 Nov 2015 08:02:57 +0100
From: Carsten Bormann <cabo@tzi.org>
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To: Brian E Carpenter <brian.e.carpenter@gmail.com>
References: <20151117235034.24927.22561.idtracker@ietfa.amsl.com> <87poz7qw2k.wl-jch@pps.univ-paris-diderot.fr> <1447858576159-79d51c78-b96c8c38-55ec1307@fugue.com> <8737w3qozs.wl-jch@pps.univ-paris-diderot.fr> <1447863094928-7e8a26f0-271186df-921ed76e@fugue.com> <87vb8zp903.wl-jch@pps.univ-paris-diderot.fr> <1447884395403-59f7ba69-4ce68f01-0794a090@fugue.com> <87egfmq35o.wl-jch@pps.univ-paris-diderot.fr> <1447906468890-334068f2-9e166c9c-ff8d872f@fugue.com> <564D70DC.7050701@gmail.com>
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Subject: Re: [homenet] Kathleen Moriarty's Discuss on draft-ietf-homenet-hncp-09: (with DISCUSS)
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Brian E Carpenter wrote:
>> Just to clarify, mandatory to implement doesn't mean you have to write the code.   It means the functionality has to be present in the deployed implementation so that two communicating partners can be configured to use it.   
> 
> Um, where is that defined? Is there a BCP that says that?
> 
> I don't think a protocol spec can say that feature X cannot be ifdeffed.
> It can say that a protocol must be capable of X and that implementations
> must therefore be capable of X. But if you tell implementors that they can't
> ifdef unused stuff when building images for highly constrained nodes, I
> don't think they will take you seriously.

Maybe slightly off-topic for homenet, but +1000 for constrained node
networks.

Grüße, Carsten

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