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Re: [homenet] The minimal Babel profile for Homenet

"STARK, BARBARA H" <bs7652@att.com> Wed, 28 October 2015 18:08 UTC

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From: "STARK, BARBARA H" <bs7652@att.com>
To: Michael Richardson <mcr+ietf@sandelman.ca>
Thread-Topic: [homenet] The minimal Babel profile for Homenet
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Date: Wed, 28 Oct 2015 18:08:05 +0000
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Cc: "homenet@ietf.org" <homenet@ietf.org>, Juliusz Chroboczek <jch@pps.univ-paris-diderot.fr>
Subject: Re: [homenet] The minimal Babel profile for Homenet
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> SHOULD is actually pretty strong.  It doesn't mean, "implement if you like"
> (that's MAY).  It means, implement it, unless you have a serious reason why
> you can't.
> 
> For instance, an IPv6 only IoT gateway probably has no interest in IPv4 if it
> can get IPv6.  MUST would make that gateway non-compliant.

Maybe conditionally mandatory? If the router can be used for routing IPv4, then it MUST implement the IPv4 routing protocol capabilities?
I prefer not leaving it up to implementers to decide what is a "serious reason" and what isn't, for something like this. To some, a "serious reason" is "it would be additional work." I would prefer to identify a condition for when it needs to be a MUST.
Barbara.

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