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

"Rob Wilton (rwilton)" <rwilton@cisco.com> Thu, 26 September 2019 10:31 UTC

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From: "Rob Wilton (rwilton)" <rwilton@cisco.com>
To: Martin Bjorklund <mbj@tail-f.com>, "lhotka@nic.cz" <lhotka@nic.cz>
CC: "yangang@huawei.com" <yangang@huawei.com>, "netmod@ietf.org" <netmod@ietf.org>
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Date: Thu, 26 Sep 2019 10:31:39 +0000
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> -----Original Message-----
> From: netmod <netmod-bounces@ietf.org> On Behalf Of Martin Bjorklund
> Sent: 26 September 2019 08:45
> To: lhotka@nic.cz
> Cc: yangang@huawei.com; netmod@ietf.org
> Subject: Re: [netmod] 答复: 答复: Please clarify implementation about
> ‘when’
> 
> > >
> > > 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.
> 
I don't like the 'when' behaviour, I would have rather that clients were forced to delete the configuration explicitly (or pass an option for an implicit delete).

However, I do agree with Martin & Juergen, that the intent of the spec is that servers perform the 'when' auto-delete behaviour, and clients must be able to rely on compliant servers behaving this way.

Thanks,
Rob


> 
> /martin
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