Couple of quick notes on networking:
Ethtool is the best tool in my opinion for editing network hardware settings. For example:
ethtool -s eth1 autoneg off speed 100 duplex full
That will turn off autonegotiation, and set the speed to 100, full duplex.
For linux networking, route is the tool for setting up routing tables.
Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 192.168.0.1 192.168.0.1 255.255.255.255 UGH 0 0 0 eth1 192.168.0.0 * 255.255.255.0 U 0 0 0 eth1 64.25.86.0 * 255.255.255.0 U 0 0 0 eth0 default 64.25.86.81 0.0.0.0 UG 0 0 0 eth0
route add -host 192.168.0.1 gw 192.168.0.1