An administrator who is troubleshooting connectivity issues on a switch notices that a switch port configured for port security is in the err-disabled state. After verifying the cause of the violation, how should the administrator re-enable the port without disrupting network operation?

Question:
An administrator who is troubleshooting connectivity issues on a switch notices that a switch port configured for port security is in the err-disabled state. After verifying the cause of the violation, how should the administrator re-enable the port without disrupting network operation?

• Reboot the switch.
• Issue the no switchport port-security violation shutdown command on the interface.
• Issue the no switchport port-security command, then re-enable port security.
• Issue the shutdown command followed by the no shutdown command on the interface.

Explanation: To re-enable the port, use the shutdown interface configuration mode command (Figure 3). Then, use the no shutdown interface configuration command to make the port operational.

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