Enabling an Error-Disabled Port Automatically
To enable a port to recover automatically from the error-disabled state after the
expiry of a configured error recovery timer, run the
errdisable recovery cause command in global configuration mode.
For example, to enable error-disable recovery for BPDU guard, enter the following command:
device(config)# errdisable recovery cause bpduguard
Note: When automatic recovery re-enables the port,
the port is not in the error-disabled state, but it can remain down for other
reasons, such as the Tx/Rx of the fiber optic not being seated properly. Thus,
the
port is not able to receive the signal from the other side. In this case, after
the
optic is inserted correctly, you should manually disable the port and then enable
it.