Re: [netmod] [Netconf] Alternative YANG library structure for 7895bis

Vladimir Vassilev <vladimir@transpacket.com> Fri, 08 December 2017 15:19 UTC

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To: Martin Bjorklund <mbj@tail-f.com>, netmod@ietf.org
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From: Vladimir Vassilev <vladimir@transpacket.com>
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Date: Fri, 8 Dec 2017 16:19:28 +0100
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Archived-At: <https://mailarchive.ietf.org/arch/msg/netmod/X8b1tdI0WYfGuXCaxmfzhRdNhrY>
Subject: Re: [netmod] [Netconf] Alternative YANG library structure for 7895bis
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On 12/08/2017 04:06 PM, Juergen Schoenwaelder wrote:
> On Fri, Dec 08, 2017 at 04:03:06PM +0100, Martin Bjorklund wrote:
>> Vladimir Vassilev <vladimir@transpacket.com> wrote:
>>> On 11/15/2017 06:29 PM, Robert Wilton wrote:
>>>
>>>> I don't think that this is really a good idea.  You would end up
>>>> returning server metadata in addition to the configuration.
>>> Obviously RFC 7895 defines only config false; data and I was not
>>> proposing a change to that. But I agree something has to be added to
>>> complete the solution. Special purpose datastore identities can be
>>> defined that return instance of yang-library data when read with
>>> <get-data>. (Datastores with yang-library config false; only data not
>>> represented in 'operational')
>>>
>>> Adding this special yang-library-datastore to the proposed
>>> ietf-datastores container e.g.
>>>
>>> module: ietf-datastores
>>> +--ro datastores
>>> |  +--ro datastore* [name]
>>> |     +--ro name          identityref
>>> |     +--ro yang-library-datastore          identityref
>>>
>> I don't understand this proposal.  How would a client learn the
>> library for <running>?  For <operational>?
> My interpretation is that the client reads the datastores list from
> <operational> and the list entries give you the identity of a separate
> datastore that gives you the content of the yang library for that
> datastore. (For each datastore, you have a separate datastore to
> report its yang library.)
Yes. The default value for yang-library-datastore leaf is ds:operational 
(the only possible one for the ds:operational datastore). This is 
backward compatible. If one needs different model for 'running', etc. 
then a new datastore identity has to be defined  and set in place of the 
default value. Then this identity can be used to read the yang-library 
data with <get-data>.

Vladimir
>
> /js
>