This read-write value sets the global status of a smart port type, controlling whether that particular device-type classification is active, inactive, or reset to its default behavior across the switch. Admins use it to globally turn off a smart-port type they don't want auto-applied, for instance if they don't want any port auto-configuring itself as a certain device type. For example, setting this to disabled for a given type prevents the switch from ever auto-classifying a port into that type, even if the learning protocols detect a matching device.