Configure the duplex mode on the Ethernet module. This command applies to 10/100/1000 Mb/s ports.
default duplex
default duplex port {slot/port[/sub-port][-slot/port[/sub-port]][,...][slot/all][all]}
duplex { half | full }
duplex port {slot/port[/sub-port][-slot/port[/sub-port]][,...][slot/all][all]}
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)
The default is half.
GigabitEthernet Interface Configuration