Set a Network Interface to full duplex 100Mbit mode

Create a new file in init.d (i like nano for file editing): nano /etc/init.d/makefull100mode type in: ethtool -s eth0 speed 100 duplex full autoneg off exit. in shell, type: chmod +x /etc/makefull100mode update-rc.d makefull100mode defaults when you reboot the machine or restart the network stack, the interface will come up with true full duplex.