12.3.1 Fault Location and Recovery Content

Recovery processing differs according to the nature of the problem. The following table describes error locations and the recovery processing.

Table 12-6: Fault locations and recovery information
Error location	Switch response	Recovery processing	Scope of effect
Error detected at a port	Automatic recovery of the applicable port is performed six times per hour. If a failure occurs at the sixth auto-recovery attempt, the switch stops. The number of auto-recovery attempts are reset after one hour of operation since the first failure.	Re-initializes the affected port.	Communication via the affected port is suspended.
Mainboard failure (CPU and SW *1)	Perform automatic recovery. If the system is operated for at least one hour after recovery, the automatic recovery count is initialized. ^#2	Re-initializes the main board. For the sixth and subsequent automatic recovery, the running-config is initialized and the port-status is set to disable to start.	Communication via all ports on the switch is suspended.
Mainboard failure (SW *1)	Makes six auto-recovery attempts in one hour. If a failure occurs at the sixth auto-recovery attempt, the switch stops. #2 However, if the system is operated for at least one hour after the first failure, the automatic recovery count is initialized.	Re-initializes the switching processor.	Communication via all ports on the switch is suspended.
Power supply (PS) failure	Stops when the power required to run the switch ceases to be supplied.	Stops the switch.	Communication via all ports on the switch is suspended.
Fan failure	Increases the speed of the other fan.	There is no means of auto-recovery.	The other fan runs faster, but this does not affect communications.

#: 1 SW recovery differs depending on the failure.

#2: If recovery processing is not performed by the configuration command no system recovery, automatic recovery is not performed.