Ports in Error Disabled State

In this article we will discuss Ports in Error Disabled State, will make brief discussion on Ports in Error Disabled State, In last article we discuss about
Port Security: Violation Modes.

When a port is configured with port security, a violation can cause the port to become error disabled. When a port is error disabled, it is effectively shut down and no traffic is sent or received on that port. A series of port security related messages display on the console.

The port LED will turn off. The show interfaces command identifies the port status as err-disabled. The output of the show port-security interface command now shows the port status as secure-shutdown. Because the port security violation mode is set to shutdown, the port with the security violation goes to the error disabled state.

The administrator should determine what caused the security violation before re-enabling the port. If an unauthorized device is connected to a secure port, the port should not be re-enabled until the security threat is eliminated. To re-enable the port, use the shutdown interface configuration mode command. Then, use the no shutdown interface configuration command to make the port operational.

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