Re: [netmod] Question on draft-wu-netmod-factory-default

[Juergen Schoenwaelder <[e-mail]>]

On Tue, Mar 26, 2019 at 05:15:40AM +0000, Qin Wu wrote:
> 
> So do all these configuration datastores receive a 1:1 copy of <factory-default>?
> [Qin]: This is close to what Andy is asking, we allow multiple target datastore to be reset.

I did understand that you allow multiple targets. My question is if
all targets receive the same content, i.e., whether reset-datastore is
just N-times copy-config or whether there is more to it.

>  If so, if we have a <factory-default>, why is invoking <copy-config> not good enough?
> [Qin]: Netconf <copy-config> operation needs to be extended to allow it to operate on the factory-default datastore.
>    2.  YANG Instance Data [I-D.ietf-netmod-yang-instance-file-format]
> 
> How would this be done? I do not see anything in reset-datastores that provides instance data. The copy-config operation already allows to provide source config inline. Why do we need another way of doing the same?
> [Qin]: In normal copy-config operation, how do we source config inline is used for factory default setting.

RFC 6241 page 43:

      source:  Name of the configuration datastore to use as the source
         of the <copy-config> operation, or the <config> element
         containing the complete configuration to copy.

>  YANG instance data draft could provide generic solution for this. We add a note to see if there is additional parameters that need to be added, will see how to address this.

I am not saying this is needed. I think the WG needs to discuss
whether all four options listed in section 2 of your I-D make sense.
Perhaps 1. and 3. are sufficient (except that I do not know exactly
how 1. is supposed to work).
 
> I do not really understand why one would need to have reset-datastore on <candidate> - is <discard-changes> not good enough?
> [Qin]: It doesn't allow you reset to <candidate> without changing <running>.

Why would that be useful? The normal reset of <candidate> is to
<running>. <candidate> is an editing scratch pad - does it really
make sense to reset <candidate> to <factory-default> without
resetting <running>? What is the use case of this?

/js

-- 
Juergen Schoenwaelder           Jacobs University Bremen gGmbH
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