Specifications

Cisco HWIC-4ESW and HWIC-D-9ESW EtherSwitch Interface Cards
How to Configure EtherSwitch HWICs
17
Configuring the Interface Duplex Mode
Follow the steps below to set the duplex mode of a Fast Ethernet interface.
SUMMARY STEPS
1. enable
2. configure terminal
3. interface fastethernet interface-id
4. duplex [auto | full | half]
DETAILED STEPS
Note If you set the port speed to auto on a 10/100-Mbps Ethernet interface, both speed and duplex are
automatically negotiated. You cannot change the duplex mode of auto negotiation interfaces.
The following example shows how to set the interface duplex mode to auto on Fast Ethernet interface 3:
Router(config)# interface fastethernet 0/1/0
Router(config-if)# speed 100
Router(config-if)# duplex auto
Router(config-if)# end
Verifying Interface Speed and Duplex Mode Configuration
Use the show interfaces command to verify the interface speed and duplex mode configuration for an
interface, as shown in the following output example.
Router# show interfaces fastethernet 0/1/0
Command or Action Purpose
Step 1
enable
Example:
Router> enable
Enables privileged EXEC mode.
• Enter your password if prompted.
Step 2
configure terminal
Example:
Router# configure terminal
Enters global configuration mode.
Step 3
interface fastethernet interface-id
Example:
Router(config)# interface fastethernet 0/1/0
Selects the interface to be configured.
Step 4
duplex [auto | full | half]
Example:
Router(config-if)# duplex auto
Sets the duplex mode of the interface.