How to configure Cisco Switch Port speed and duplex

To configure a port’s speed and duplex mode on Cisco Switch 3500, follow these steps:

1. Login the switch
2. Use en command to enable Privileged EXEC.
3. Use conf t command to enable Global Configuration.
4. Then do: interface fa0/
5. speed 100
6. duplex full
7. ctrl-z
8. copy run start
9. Press Enter to confirm “Destination filename [startup-config]?”