Any port on your Cisco switch can be enabled using the instructions in this emindsca. Unless you specifically disable a port on your Cisco switch, the ports on your Cisco switch will be enabled by default in the majority of cases.
1. Connect your switch to your computer. To establish a serial connection, you can use PuTTY or any other SSH or telnet application. The procedure for connecting the devices varies depending on the model you’re using, so consult your manual for specific instructions.
2. Show the status of the interface by typing show interface status and pressing Enter. This displays a list of all available ports, along with their respective logical IDs. Once you’ve determined the ID of the port you want to enable, you can use the following command to do so.
3. Enter the word enable into the text box. If your switch is protected by a password, you will be prompted to enter it at this point. If you don’t, you’ll simply be moved to the next line.
4. Type configure terminal and press ↵ Enter. This puts the switch into configuration mode.
5. Type interface port-id and press ↵ Enter. Replace port-id with the ID of the port you want to enable, for example, interface fastEthernet 0/1 or interface Gi1/10. Now your switch knows which interface to configure.
6. Type no shutdown and press ↵ Enter. This turns the port on.
If you want to turn the port off, you’d use shutdown instead.
7. To make the changes permanent, run the commands copy running-config startup-config. When you do this, the new changes are applied to the startup configuration file.
8. Type end and press ↵ Enter. This exists configuration mode.
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