The sub-interface is used to configure the physical interface to be a routing interface, and the routing interface needs to be enabled for VLAN trunk scenario.
[Name] displays the name of the sub-interface. The interface name is automatically generated and cannot be modified. For example, the sub-connection of VLAN2 under eth0 port. The sub-interface of VLAN2 under the port is automatically generated as eth0.2.
[Zone] shows the Zone to which the sub-interface belongs.
[Address] Displays the IP address of the sub-interface.
[MTU] Display the MTU value of the sub-interface.
[PING] Display whether PING sub-interface is allowed.
[Link Status] Shows whether link detection is enabled on the subinterface.