Paul W. Abrahams wrote:
Suppose I have two LANs, one with fixed IP addresses in the 10.0.0.x range and the other with fixed IP addresses in the 192.168.1.x range, and want to merge them into a single network, i.e., all ethernet cards now connected to a single switch/hub. I assume there's a single call on the route command from one of the machines in the 10.0.0.x range that will make the 192.168.1.x computers visible, but there's no gateway needed or wanted as far as I can tell. What would that call on "route" be?
There's no such call, that I'm aware of. However, if you've got a default router, configured with an alias address, any calls to the other address range by one of the hosts will attempt to connect via the router, which will then issue an ICMP redirects, to tell that host to communicate directly.