Setting The Interface Duplex Mode - Cisco Catalyst 4500 series Administration Manual

Configuring Optional Interface Features
Command
Step 1
Switch(config)# interface gigabitethernet1/1
Step 2
Switch(config-if)# speed nonegotiate
To restore autonegotiation, enter the no speed nonegotiate command in the interface configuration
mode.
For the blocking ports on the WS-X4416 module, do not set the speed to autonegotiate.
Note

Setting the Interface Duplex Mode

When the interface is set to 1000 Mbps, you cannot change the duplex mode from full duplex to half
Note
duplex.
To set the duplex mode of a Fast Ethernet interface, perform this task:
Command
Step 1
Switch(config)# interface fastethernet
slot/interface
Step 2
Switch(config-if)# duplex [auto | full | half]
This example shows how to set the interface duplex mode to full on Fast Ethernet interface 5/4:
Switch(config)# interface fastethernet 5/4
Switch(config-if)# duplex full
Displaying the Interface Speed and Duplex Mode Configuration
To display the interface speed and duplex mode configuration for an interface, enter this command:
Command
Switch# show interfaces [fastethernet |
gigabitethernet | tengigabitethernet]
slot/interface
This example shows how to display the interface speed and duplex mode of Fast Ethernet interface 6/1:
Switch# show interface fastethernet 6/1
FastEthernet6/1 is up, line protocol is up
Hardware is Fast Ethernet Port, address is 0050.547a.dee0 (bia 0050.547a.dee0)
MTU 1500 bytes, BW 100000 Kbit, DLY 100 usec,
Encapsulation ARPA, loopback not set
Keepalive set (10 sec)
Full-duplex, 100Mb/s
ARP type: ARPA, ARP Timeout 04:00:00
Last input 00:00:54, output never, output hang never
Last clearing of "show interface" counters never
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
8-22
reliability 255/255, txload 1/255, rxload 1/255
Purpose
Specifies the interface to be configured.
Disables autonegotiation on the interface.
Purpose
Specifies the interface to be configured.
Sets the duplex mode of the interface.
Purpose
Displays the interface speed and duplex mode
configuration.
Chapter 8 Configuring Interfaces
OL-30933-01