Juergen Schoenwaelder <j.schoenwael...@jacobs-university.de> wrote: > On Fri, Sep 11, 2015 at 10:54:22AM +0100, Robert Wilton wrote: > > > > > >Then Lada brought up the example of ip addresses. It was mentioned > > >on the call that for ip addresses there would be three lists; one for > > >intended, one for applied, and one in derived state, where the one in > > >derived state is what the box *really* uses. So for example if it > > >gets an ip from dhcp, it will be in the derived state list, but not in > > >applied config. > > > > > >Why is this ip-address list different from the interface list? Why > > >was it enough with two lists for interfaces, but we need three for ip > > >addresses? > > I don't see that they are different. I think that you have 3 > > lists/leaves in both cases: > > > > I.e. I would say that 3 IP addr leaves are required in an async system, > > at a given time t: > > - only the intended leaf can indicate what IP addr config the operator > > wants on the interface (if any). > > - only the applied leaf can indicate what IP addr is actually being > > used as the configured value on the interface. > > - only the derived leaf can indicate what IP addr is actually > > operationally being used for the interface (which might be due to IP > > addr config, DHCP, or perhaps some other mechanism). > > > > I think that in the both kwatsen-netmod-opstate and > > wilton-netmod-opstate there are logically 3 interface lists as well: > > - /if:interfaces is logically split into 2, either through being > > present in separate running and applied datastores, or through having > > separate cfg-intended/cfg-applied leaves. > > - /if:interfaces-state, which I perceive as logically the derived > > state for an interface. > > > > My personal requirement would be to be able to find all IP addresses > of an interface that are operationally used in one place.
Yes. I am trying to understand if a separate list of operationally used addresses is needed even if we have the "applied config". I think the answer is yes. Then the question is if we don't need a separate list of operationally used interfaces as well. If we do, what value does the "applied config" idea bring us? /martin _______________________________________________ netmod mailing list netmod@ietf.org https://www.ietf.org/mailman/listinfo/netmod
