A.
Configure the net system - id command under routerisis and enable IS - IS on each interface with the ip router isis command.
B.
Configure the net sy stem - id and the network net - id commands under routerisis.
C.
Configure the network net - id command(s) under routerisis and enable IS - IS on each interface with the ip router isis command.
D.
Configure the network net - id command(s) and the is - type level -1- 2 command under routerisis.
E.
Configure the net system - id and the network net - id commands under routerisis and enable ISIS on each interface with the ip router isis command.