When you connect an external USB network (Ethernet) dongle to a node running XCP-ng, you might encounter an issue where the device appears as a "side-NUMBER-eth0" interface. This interface, however, is not connected and cannot be used for any management interfaces within XCP-ng. You may still be able to manually configure it and to assign IP addresses but it will be still refused to be used for the management interface. To resolve this, you need to rename the device appropriately. Unfortunate...
