Dual Ethernet Cards in OS X 10.2 Server

Hello. My server has two ethernet ports and I would like to have the two ports to sit on the same physical network (192.168.222.x), but have each port use a different router (.1 and .254). That way the server would be accessible via both routers (and thus both net connections). However, I can only get the port that is listed first in the Network system pref pane to listen through the routers. Internally on the network, both ports are available for use. However, only the top most listed port works outside of the network. Both ports use a 24 bit subnet mask. Any suggestions? Thanks!