Re: [netmod] *one* week 2nd WG Last Call: draft-ietf-netmod-revised-datastores-07

Andy Bierman <> Fri, 08 December 2017 20:35 UTC

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From: Andy Bierman <>
Date: Fri, 08 Dec 2017 12:35:50 -0800
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To: Lou Berger <>
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Subject: Re: [netmod] *one* week 2nd WG Last Call: draft-ietf-netmod-revised-datastores-07
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I have reviewed draft-07 and my previous comments about NMDA have been

This might be the most important sentence in the draft:

sec. 5.3

   The datastore schema for <operational> MUST be a superset of the
   combined datastore schema used in all configuration datastores except
   that YANG nodes supported in a configuration datastore MAY be omitted
   from <operational> if a server is not able to accurately report them.

The MUST implies that there is no need to design a YANG library that can
an implementation that violates this MUST (i.e., 1 schema tree for the

The MAY is troublesome because it completely contradicts the conformance
in each YANG module supported by the server.  Any data node without any
if-feature-stmts is mandatory to implement.

What about config=false subtrees within a config=true subtree?
Can they be omitted from <operational> as well, or does the draft just
intend to
omit the operational value of config=true nodes?  Should be specific.

Perhaps this draft does not need the MAY half of the sentence at all.
The YANG library can specify that it is for conformance-reporting, not


On Mon, Dec 4, 2017 at 6:35 AM, Lou Berger <> wrote:

> All,
> This starts a second working group last call on
> draft-ietf-netmod-revised-datastores.
> As this is a 2nd LC that is focused on changes since the last LC, it
> closes in *one* week. The working group last call ends on December 11.
> Please send your comments to the netmod mailing list.
> At this point, we're most interested in verifying that previous comments
> are addressed since the last call on the -04 rev of the draft was held.
> A summary of changes can be found at
> A diff can be found at
> revised-datastores-04.txt&url2=draft-ietf-netmod-revised-datastores-07.txt
> Comments along the of: I have reviewed this version of the document and it
> addresses my previous comments would be particularly helpful.
> Thank you,
> Netmod Chairs
> _______________________________________________
> netmod mailing list