It's just plain simple point-to-point links.
So you must have a DECnet point-to-point device driver that somehow can emulate multiple
circuits with on instance of the driver. How do you do that?
That's the limitation on the VMS implementation - each instance of the device driver
is one circuit. If you have a new remote node you need a new circuit, a new instance of
the driver, and hence a different port. You can't have two separate instances of the
driver listening on the same port.
Bob