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Re: [netmod] FW: a question about ietf-hardware yang module

Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de> Tue, 25 June 2019 05:51 UTC

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Date: Tue, 25 Jun 2019 07:51:23 +0200
From: Juergen Schoenwaelder <j.schoenwaelder@jacobs-university.de>
To: Andy Bierman <andy@yumaworks.com>
CC: "Fengchong (frank)" <frank.fengchong@huawei.com>, "netmod@ietf.org" <netmod@ietf.org>
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Subject: Re: [netmod] FW: a question about ietf-hardware yang module
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On Mon, Jun 24, 2019 at 07:14:18PM -0700, Andy Bierman wrote:
> On Mon, Jun 24, 2019 at 6:59 PM Fengchong (frank) <
> frank.fengchong@huawei.com> wrote:
> 
> > Andy,
> >
> >     Can you clarify this question?
> >
> >
> >
> 
> Since state-last-changed seems to cover state data changing, last-change
> seems to apply to
> the operational value of the config=true nodes in the /hardware/component
> subtree
> 
> Andy
>

It could be that the intention was that ietf-hardware:last-change
matches ENTITY-MIB:entLastChangeTime, which has this description (see
RFC 6933):

            "The value of sysUpTime at the time a conceptual row is
            created, modified, or deleted in any of these tables:
                    - entPhysicalTable
                    - entLogicalTable
                    - entLPMappingTable
                    - entAliasMappingTable
                    - entPhysicalContainsTable
            "

If so, ietf-hardware:last-change should change whenever the an element
in the hardware/component list changes, e.g., pluggable hardware is
added or removed.

If this interpretation is correct, then an entry in the table "YANG
Data Nodes and Related ENTITY-MIB Objects" is missing. Anyway, the
description of ietf-hardware:last-change is obviously not precise
enough and this thread should perhaps lead to an errata if we find
agreement what the intention here was.

/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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