David Conrad wrote: > Topological aggregation to permit scaling was an afterthought > that doesn't fit particularly well into that architecture. Topological aggregation to divide an IP address into network and local address parts with classes A, B and C to permit scaling has been there from the beginning. It's inherent to fundamental architecture of the CATENET model. You can find more than two levels of aggregation in RFC796. Masataka Ohta _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf