Re: [netmod] 答复: 答复: Please clarify implementation about ‘when’

Schönwälder, Jürgen <J.Schoenwaelder@jacobs-university.de> Thu, 26 September 2019 09:39 UTC

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Date: Thu, 26 Sep 2019 09:39:51 +0000
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Subject: Re: [netmod] =?utf-8?b?562U5aSNOiDnrZTlpI06IFBsZWFzZSBjbGFyaWZ5IGlt?= =?utf-8?b?cGxlbWVudGF0aW9uIGFib3V0IOKAmHdoZW7igJk=?=
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On Thu, Sep 26, 2019 at 09:45:26AM +0200, Martin Bjorklund wrote:
> > > 
> > > >    o  There MUST be no nodes tagged with "when" present if the "when"
> > > 
> > > >       condition evaluates to "false" in the data tree.
> > > 
> > > 
> > > It also says in 8.2:
> > > 
> > >    o  If a request modifies a configuration data node such that any
> > >       node's "when" expression becomes false, then the node in the data
> > >       tree with the "when" expression is deleted by the server.
> > 
> > Right. But the request won't modify a configuration data node because it is
> > rejected. So the premise of the above implication doesn't hold, and the
> > conclusion doesn't apply.
> 
> With the same logic you can claim conformance if you reject a request
> to create nodes under a case if another case is active.  I think it is
> quite clear that this auto-deletion is part of the spec, and something
> clients can rely on.  If the intention had been that this was optional
> to implement, it would have been clearly stated, and there would have
> been mechanism present for clients to detect this.
>

Yes, this auto-delete behaviour is part of the specification and it
was not an oversight that this slipped in.

Sure, one can discuss whether this feature is useful or harmful
but the only way to officially remove this is to create a new
specification and to run it through the IETF process.

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
Phone: +49 421 200 3587         Campus Ring 1 | 28759 Bremen | Germany
Fax:   +49 421 200 3103         <https://www.jacobs-university.de/>