>The route command accepts a flag "-interface", where instead of
>specifying a remote gateway to the destination, you specify the local
>address of an interface which will be used to transmit to the directly
>reachable destination.

>Does that already do what you want, or am I missing something?

Not if you have several interfaces with the same IP address, which is
a fairly common approach to PPP; i.e., le0 would be 192.129.84.3,
ppp0 would be 192.129.84.3<->192.129.84.18, etc etc.

-s