Configure static routes in debian
From Notes_Wiki
Configure static routes in debian
To configure static routes in debian edit file '/etc/network/interfaces' and use
up route add -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.2.1 down route del -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.2.1
Sample file that uses same technique is:
auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 10.4.7.2 netmask 255.255.255.0 # gateway 10.4.7.1 up route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.4.7.1 down route del -net 10.0.0.0 netmask 255.0.0.0 gw 10.4.7.1 up route add -net 172.16.0.0 netmask 255.240.0.0 gw 10.4.7.1 down route del -net 172.16.0.0 netmask 255.240.0.0 gw 10.4.7.1 up route add -net 192.168.0.0 netmask 255.255.0.0 gw 10.4.7.1 down route del -net 192.168.0.0 netmask 255.255.0.0 gw 10.4.7.1 auto eth1 iface eth1 inet static address 10.4.8.54 netmask 255.255.255.0 gateway 10.4.8.2