two IP networks on same ethernet

[Michael Murphy]

We will soon have to change the IP address of every device on our local area
network.   Yes, I know this is stupid.  We anticipate that not everyone will
be able to do the conversion at the same time, and that the machines that
are not switched over won't be able to communicate with those that have been.  I
would be grateful to learn if there were a way to avoid this problem.

I do know that with BSD unix it is possible to set up a zero-length route
to the "different" network on the same interface, which takes care of this
type of host.  There are other kinds of machines, e.g. terminal servers,
which don't know about this trick.  I suppose what we need to have in this
situation is a "gateway" to forward packets from one network on the same
interface to the different network.  Alternatively, we need to know if it
is possible for a BSD unix host to have two different IP addresses associated
with the same network interface.  Thanks.


-- 
mike murphy  mm06 at gte.com {harvard,vaxine}!bunny!mm06
gte labs, waltham, ma