Hi John, This is a great set of questions and get right at the heart of the problem.
From what you say, I assume that a logical link between two ports would be what in DCN I call a path segment. A path segment has uses some resource on a physical link. in this case, each logical link then can have an adaptation. This is ok - but --
where is a physical link described? how do I know how a physical link can be subdivided into dynamic logical links? how do I create an ete circuit that is a concatenation of logical links. How do I name the ete circuit and treat it as an entity that is time variant?
The physical link is described as another link (indicating that it is physical) and enumerating its characteristics. Next, we'd need to describe the relationship between this physical link and the logical links atop it. In our model (where "our" is the topology schema folks in perfSONAR @ Internet2) we have an element called "relation". As I think I mentioned, this is one sense of the "adaptation" concept from the NDL. At any rate, we must represent the case you're highlighting.
These are what seems to me to be needed for DCN, to both create reservations and circuits, and to monitor the reservations and circuits.
Absolutely. Hopefully, this begins to address it. best, martin