[netmod] Can get-data from operational return a non-configured presence container?

[Jason Sterne (Nokia)]

Hi all,

(1)
Simple example YANG model 1:
container system {
    container foo1 {
        presence;
    }
}

Assume running does *not* have foo configured/enabled.

Is it possible for a server to decide to return the following in a response to 
a get-data from "operational"?  i.e. for whatever reason, the server considers 
foo1 as operationally enabled?
<system>
    <foo1/>
</system>

I think this might be somewhat analogous to the way an interface can show up in 
the interfaces list in operational even though it isn't in the running config. 
But I'm not positive if presence containers have this same possibility.

(2)
Simple example YANG model 2:
container system {
    container foo2 {
        presence;
        leaf bar {
            type string;
            default "hello"
        }
    }
}

Again assume running does *not* have foo configured/enabled (or bar).

Would a get-data from "operational" return this?
<system>
    <foo2>
        <bar>hello</bar>
    </foo2>
</system>

(3)
Finally, here's another one:
container system {
    container foo3 {
        presence;
        list item {
            key name;
            leaf name { type string;}
        }
    }
}

If running contains nothing, but the system considers an item called "apple" to 
exist operationally, would a get-data from "operational" return this?
<system>
    <foo3>
        <item>
            <name>apple</name>
        </item>
    </foo3>
</system>

Jason (he/him)


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