1.2. Interface Operations

1.2.1. Configurations

1.2.1.1. Enter and Exit Interface Config Mode

Enter config mode (see Enter and Exit Configuration Mode).

# config FastEthernet 0/1
device(config)# interface FastEthernet 0/1 # or "int fa0/1"
device(config-if)#    # see "(config-if)"
device(config-if)# exit
device(config)#

# config FastEthernet 0/1, 0/2, ..., 0/10
device(config)# interface range FastEthernet 0/1-10
device(config-if-range)

1.2.1.2. Change Interface Speed

Enter config-if mode (see Enter and Exit Interface Config Mode).

device(config-if)# speed 10     # 10Mbps
device(config-if)# speed 100    # FastEthernet
device(config-if)# speed 1000   # GigabitEthernet
device(config-if)# speed auto   # auto mode (default)

1.2.1.3. Change Duplex Mode

Enter config-if mode (see Enter and Exit Interface Config Mode).

device(config-if)# duplex half  # half duplex
device(config-if)# duplex full  # full duplex
device(config-if)# duplex auto  # auto mode (default)

1.2.1.4. Activate and Deactivate Port

Enter config-if mode (see Enter and Exit Interface Config Mode).

device(config-if)# no shutdown  # activate
device(config-if)# shutdown     # deactivate