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How to configure Cisco Switch Port speed and duplex

To configure the first port’s speed (100 in our case) and duplex (full in our case) on Cisco Switch 3500, follow these steps:

1. Login the switch using telnet command, for example telnet 10.0.0.1.

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]?”

Another example,

1. con t

2. int g0/9

3. speed 1000

4. end

5. wr mem

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