2. “Support of inter-layer attributes (e.g., adaptation relationships). Between a client and server layer, a general mechanism for describing the layer relationship exists”
For example: 4 client links of type X can be supported by this server layer link
=> Sonet/SDH I-d tackles such kind of issues (multiplexing/concatenation capability TLV)
Another example is being able to identify when two layers share a common server layer
=> when ? Do we speak about policy aspects here ?