Configure the eight-character simple password authentication key for the port.
default ip ospf authentication-type
ip ospf authentication-key WORD<0-8>
ip ospf port {slot/port[/sub-port][-slot/port[/sub-port]][,...][slot/all][all]} authentication-key WORD<0-8>
Identifies the slot and port in one of the following formats:
a single slot and port (slot/port)
a range of slots and ports (slot/port-slot/port)
a series of slots and ports (slot/port,slot/port,slot/port)
all ports on the same slot (slot/all)
all ports on the switch (all)
None
GigabitEthernet Interface Configuration