Is there a way to have two different IP addresses (each going out
through a different router) on the same physical interface?

I have a Sparc IPC which I would like to have on both DSL and Cable
Modem.  I've had multple IP's on a single ethernet interface under
SunOS 4 but I can't remember where I got the drivers.

Obviously I could just add another ethernet card, but sbus cards are
hard (expensive) to come by.

Thanks!