HP ProLiant 300 Series Administration Manual page 216

RJ-45
Unknown—The server is unable to communicate with the driver for the installed NIC.
The NIC is installed in the registry, but the driver is not. This error occurs when
the NIC has been installed but the server has not been restarted. If this problem
persists after the server has been restarted, the driver has not been loaded or the
Advanced Network Control utility is unable to communicate with the driver.Note:
Only NICs assigned as members of a team are displayed as Unknown. If a teamed
NIC is turned off, it displays as Unknown.
Disabled—The NIC has been disabled through the Device Manager or NCPA.
For more advanced problems with NIC teaming, refer to the help section in the HP Teaming and
Configuration utility.
216 NIC Teaming
Description