Wiktionary
subinterface
n. (context telecommunications computing networking English) A division of one physical interface into multiple logical interfaces.
Usage examples of "subinterface".
Use the exit command in subinterface configuration mode to return to interface configuration mode.
If the specified subinterface does not have an IP address or is in a down state, then RADIUS reverts to the default.
To avoid this, add an IP address to the subinterface or bring the interface to the up state.
If the specified subinterface does not have an IP address or is in a down state, TACACS reverts to the default.