"Bogaert, Bart (Nokia - BE)" <[email protected]> wrote:
> On Tue, Sep 06, 2016 at 07:50:47AM +0000, Bogaert, Bart (Nokia - BE) wrote:
> >
> > [Bart Bogaert] When sending a configuration request to a device while
> > there is no HW physically present yet is what we call pre-provisioning
> > meaning that the configuration is made up-front in attendance of the
> > HW being plugged at a later stage. When the plugged HW does not meet
> > the pre-configured data I think it is normal that an alarm is raised
> > but that does not take away the fact that the device was configured in
> advance.
> >
>
> In your example, there is nothing configured as far as I can tell.
>
> The way the interfaces data model supports pre-configuration is by having a
> _name binding_; a pre-configured interface is applied once the name of the
> pre-configured interfaces matches the name of a
> (physical) interface. I think Martin is asking the question whether the same
> model of using name bindings can be applied in your case and if not why not.
>
> [Bart Bogaert] I'm afraid I am lost in the names being used here. Whether
> it's called name binding or pre-configuration or still something else, the
> key point is that we configure objects in the device prior to them being
> physically present, nothing more, nothing less. The consequence of this
> being that these objects should be present in the data tree of the device
> and once the HW gets plugged all operational data linked to that comes into
> existence too. I do not know of another way to explain what is intended
> with what we call 'pre-configuration'.
I think there are two things that I am trying to understand:
(i) Identification
In order to be able to pre configure a component, the operator
needs a deterministic way to idenfity the component. How
exactly is this done?
One way is to rely on the name of the to-be-present component.
Another way is to identify its parent by name, and provide a
parent-rel-pos integer. (The latter assumes that the parent's
name is known...)
(ii) Configuration
Once a component is identified, what parameters can you
pre-configure?
One answer could be "none", which I think is what the examples
you have provided so far have. This then would not really be
pre-configuration, but rather a constraint, as Juergen
indictated.
/martin
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