Comment 65 for bug 881079

Please note there is a problem with removable network devices (usually usb). The file /etc/init/network-interface.conf "causes network devices to be brought up or down as a result of hardware being added or removed", as its own comment says, but they must be configured as "auto" in /etc/network/interfaces (exec ifup --allow auto $INTERFACE), which will most likely cause the "Waiting up to 60 more seconds for network configuration" message at boot.

For removable network devices, there should be a method of bringing them up and down correctly without requiring them to be plugged at boot. It was working on previous releases of Ubuntu, probably because there was no delay at boot for missing devices.