if you know your ip, then set the others manually.
if , for example, its a LAN, and your ip is (or you want it to be), 192.168.1.1, then you would enter this as root:
# ifconfig eth1 192.168.1.1 broadcast 192.168.1.255 netmask 255.255.255.0
that should take care of it.
if, on the other hand ...