Overview Error-Disable Management

The Error-Disable function is an error detection and fault recovery mechanism on ports.

Exceptions on ports may degrade the performance of the entire network or bring down the entire network. The Error-Disable function can limit the abnormality within a single device or part of the network, preventing the abnormality from affecting other normal ports and preventing the abnormality from spreading.

If an exception is detected on an open port, the port is automatically closed so that the port will not forward packets. That is, if an error condition is triggered on the port, the port is automatically disabled. This is the Error-Disable management function, and the port status is the Error-Disabled status.

Currently, the following functions are supported: storm suppression, port security, link flapping, DHCP rate limit, BPDU Guard, ARP detection, L2 protocol tunnel, loopback detection, OAM, Monitor Link, and fabric-failure.

If an exception is detected on a port through the above functions, the port is automatically closed, and it is set to the Error-Disabled status. However, this status cannot continue. After the fault is eliminated, the port needs to be enabled again, and the Error-Disabled status of the port needs to be cleared so that the port can continue to forward packets. Here the automatic recovery mechanism of the Error-Disable management function is involved.