System Alarms - Cisco Catalyst 9400 System Management Configuration Manual

Environmental Monitoring and Power Management
Case 4. Temperature emergency on the active
supervisor module.

System Alarms

Any system has two types of alarms: major and minor. A major alarm indicates a critical problem that could
lead to system shutdown. A minor alarm is informational—it alerts you to a problem that could become critical
if corrective action is not taken.
The following table lists the possible environment alarms.
Table 21: Possible Environmental Alarms
A temperature sensor over its warning threshold
A temperature sensor over its critical threshold
A temperature sensor over its shutdown threshold
A partial fan failure
A complete fan failure
Note
Fan failure alarms are issued as soon as the fan failure condition is detected and are canceled when the fan
failure condition clears. Temperature alarms are issued as soon as the temperature reaches the threshold
temperature. An LED on the supervisor module indicates whether an alarm has been issued.
When the system issues a major alarm, it starts a timer whose duration depends on the alarm. If the alarm is
not canceled before the timer expires, the system takes emergency action to protect itself from the effects of
overheating. The timer values and the emergency actions depend on the type of supervisor module.
Note Refer to the Hardware Installation Guide for information on LEDs, including the startup behavior of the
supervisor module system LED.
Table 22: Alarms on Supervisor Module
Event
Card temperature exceeds
the critical threshold.
Card temperature exceeds
the shutdown threshold.
Chassis temperature
exceeds the warning
threshold.
A complete fan failure alarm does not
result in system shutdown.
Alarm Type
Major
Major
Minor
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
Power down the chassis.
minor
major
major
minor
major
Supervisor LED Color Description and Action
Red Syslog message displays
when the alarm is issued.
Red Syslog message displays
when the alarm is issued.
Orange Syslog message displays
when the alarm is issued.
System Alarms
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