Re: [netmod] Effect of ordered by user on state(config false) list

Schönwälder, Jürgen <J.Schoenwaelder@jacobs-university.de> Mon, 28 October 2019 08:47 UTC

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From: =?utf-8?B?U2Now7Zud8OkbGRlciwgSsO8cmdlbg==?= <J.Schoenwaelder@jacobs-university.de>
To: Martin Bjorklund <mbj@tail-f.com>
CC: "tsaad=40juniper.net@dmarc.ietf.org" <tsaad=40juniper.net@dmarc.ietf.org>, "draft-ietf-teas-yang-te-types@ietf.org" <draft-ietf-teas-yang-te-types@ietf.org>, "netmod@ietf.org" <netmod@ietf.org>
Thread-Topic: [netmod] Effect of ordered by user on state(config false) list
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Date: Mon, 28 Oct 2019 08:47:53 +0000
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Subject: Re: [netmod] Effect of ordered by user on state(config false) list
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On Mon, Oct 28, 2019 at 08:42:57AM +0100, Martin Bjorklund wrote:
> Hi,
> 
> Tarek Saad <tsaad=40juniper.net@dmarc.ietf.org> wrote:
> > Hi,
> > 
> > We are wondering if “ordered by user” has any effect on a (config
> > false)/state list?
> > Given RFC6020 specifies “ordered by system” as the default order, does
> > this mean it is the order assumed for a state list with “ordered by
> > user”?
> 
> There is no effect "on the wire"; the entries are sent in the order
> determined by the server in both cases.  But it informs to the
> consumer of the data model that the order of the list entries carries
> some meaning.
>

For operational is always about what the system actually does.

For ordered by user entries configured by intended, the order of
entries used by the system should be the order defined by the users
but ultimately operational needs to report what is actually used. (If
a system fails to honor ordered by user, this should be visible from
comparing operational and intended. This is essential for debugging.)

/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/>