RE: draft-bonica-tunneltrace-02

["Mak, L (Leen)" <lmak@lucent.com>]

Let me make a Friday afternoon remark and than duck 
for the flak:

IMHO, the layering concept (and the associated system
of functional modelling) is to the study and design of
(circuit based) transport networks what the Periodic 
System of Elements is to chemistry.

Of course, you can do without, but with such an ordening 
principle the work in the field becomes a bit less intuitive 
and a bit more structured. If you like: less of an art and 
more of an engineering discipline. 

I'm afraid this does not progress the discussion on the 
bonica draft, but it might help getting the layering concept 
where it belongs ...


Leen Mak.