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Catalyst 3750, 3560, 3550, 2975, 2970, and 2960 Switch System Message Guide
OL-8551-04
Chapter 3 Message and Recovery Procedures
HARDWARE Messages
Error Message GIGASTACK-6-LOOP_DETECTED: GigaStack GBIC in [chars] is selected as
Master Loop Breaker. Link 2 of the GigaStack GBIC is disabled to break the loop.
Note This message applies only to Catalyst 3550 switches.
Explanation A loop is detected in the stack, and this GigaStack GBIC module is selected as the
master loop breaker. Link 2 of this GigaStack GBIC module is disabled to break the loop. [chars] is
the interface name.
Recommended Action No action is required.
HARDWARE Messages
This section contains hardware messages.
Error Message HARDWARE-2-FAN_ERROR: Fan [chars] Failure
Explanation The switch fan is not working. [chars] is the fan name.
Recommended Action This is a hardware failure. The fan might recover automatically. If the fan
failure persists, copy the message exactly as it appears on the console or in the system log. Research
and attempt to resolve the error by using the Output Interpreter. Use the Bug Toolkit to look for
similar reported problems.If you still require assistance, contact Cisco technical support and provide
the representative with the gathered information. For more information about the online tools and
about contacting Cisco, see the
“Error Message Traceback Reports” section on page 2-7.
Error Message HARDWARE-2-THERMAL_WARNING: Temperature has reached warning threshold.
Note This message applies only to Catalyst 3750, 3560, 2975, 2970, and 2960 switches.
Explanation The temperature sensor valve inside the switch reached the warning threshold. The
switch can function normally until the temperature reaches the critical threshold.
Recommended Action The external temperature is high. Reduce the temperature in the room.
Error Message HARDWARE-3-ASICNUM_ERROR: Port-ASIC number [dec] is invalid.
Note This message applies only to Catalyst 3750, 3560, 2975, 2970, and 2960 switches.
Explanation The port ASIC number used is invalid. Each port ASIC is identified by an ID. [dec] is
the ASIC number.
