Edit /etc/network/interfaces and make following changes:
1.Add interface to auto line (your interface name may change and number of interfaces may also change). This change makes interface to be brought up at boot time:
auto lo eth0 eth1 eth2
2.Add following lines for each interface. This change will make interface to be manually configured:
iface eth1 inet manual pre-up /sbin/ifconfig $IFACE up post-down /sbin/ifconfig $IFACE down
reboot and see your changes.