By default, GigabitEthernet0/0/0 can be used as an out-of-band management interface in the USG2200 series.

Note: Can be used as an in-band management interface. In-band management: The management control information of the network and the bearer service information of the user network are transmitted through the same logical channel. Out-of-band management: The management control information of the network and the bearer service information of the user network are transmitted on different logical channels.