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Re: [netconf] Defaults and NP containers in YangPush

Schönwälder, Jürgen <J.Schoenwaelder@jacobs-university.de> Fri, 13 December 2019 12:17 UTC

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From: "Schönwälder, Jürgen" <J.Schoenwaelder@jacobs-university.de>
To: "Rob Wilton (rwilton)" <rwilton@cisco.com>
CC: Martin Bjorklund <mbj@tail-f.com>, "balazs.lengyel=40ericsson.com@dmarc.ietf.org" <balazs.lengyel=40ericsson.com@dmarc.ietf.org>, "netconf@ietf.org" <netconf@ietf.org>, "mark.hollmann@ericsson.com" <mark.hollmann@ericsson.com>
Thread-Topic: [netconf] Defaults and NP containers in YangPush
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Date: Fri, 13 Dec 2019 12:17:29 +0000
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Subject: Re: [netconf] Defaults and NP containers in YangPush
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On Fri, Dec 13, 2019 at 11:50:59AM +0000, Rob Wilton (rwilton) wrote:
> Hi Juergen,
> 
> I'm all for keeping things simple and homogeneous.
> 
> For client writable configurable datastores then I completely agree with you that "explicit" is the sanest basic mode, and I support converging on that.  If devices want to optionally support returning the contents with-default versions of that data on a per query basis then that is fine with me.
> 
> But for <operational>, RFC 8526 effectively specifies:
>  - if no "with-default" parameter is specified, then the values returned are the "in-use" values, i.e. really much closer to the "report-all" default mode.
>  - "report-all-tagged" and "trim" MAY be specified and return different output.
>

For <operational> you get the "in-use" values except if you use the
OPTIONAL to implement "with-defaults" parameter and you set it to
"trim".

Perhaps we should drop that since you can filter on origin.

> Either way, I think that it would be helpful to refine what we have
> standardized so far, and make sure that the behaviour is well
> specified.  At the moment, it doesn't seem to be.

Filtering on origin looks like a much cleaner and more flexible
solution. OK, origin annotations may not be available in <intended>,
but they could be meaningful for some implementations that do not
strictly follow Fig. 2 of RFC 8342 by allowing insertion of say system
config data into intended that is not stricly coming out of <running>.

/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/>

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