logical name, driver
https://help.ubuntu.com/10.04/serverguide/network-configuration.html
Ethernet Interface Logical Names
Interface logical names are configured in the file
/etc/udev/rules.d/70-persistent-net.rules
If you would like control which interface receives a particular logical name, find the line matching the interfaces physical MAC address and modify the value of NAME=ethX to the desired logical name. Reboot the system to commit your changes.