apt-get install vlan
vi /etc/route
ip rule flush ip rule add from all table main pref 1 ip rule add from all table default pref 32767 ip rule add from 10.96.81.201 table vps242 pref 1000 ip rule add from 10.96.82.243 table vps242 pref 1000 ip route replace default via 10.96.80.241 table vps241 ip route replace default via 10.96.80.242 table vps242 ip route replace default via 10.96.80.254 table vps254 ip route replace default via 10.96.80.241 table default
vi /etc/network/interfaces
auto lo iface lo inet loopback # The primary network interface auto eth0 iface eth0 inet static address 10.96.80.251 netmask 255.255.255.0 auto vlan81 iface vlan81 inet static address 10.96.81.251 netmask 255.255.255.0 vlan-raw_device eth1 auto vlan82 iface vlan82 inet static address 10.96.82.251 netmask 255.255.255.0 vlan-raw_device eth1 auto vlan83 iface vlan83 inet static address 10.96.83.251 netmask 255.255.255.0 vlan-raw_device eth1