Howto Use an External USB Network Dongle in XCP-ng for the Management Interface
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 https://gyptazy.ch/howtos/howto-use-usb-network-ethernet-with-xcpng-for-management-interface/