Cisco Catalyst 9400 User Manual

Description and ActionSupervisor LED ColorAlarm TypeEvent
Syslog message displays
when the alarm is issued.
OrangeMinorChassis fan tray
experiences partial failure.
Syslog message displays
when the alarm is issued.
RedMajorChassis fan tray
experiences complete
failure.
Disabling Thermal Shutdown
Starting with the Cisco IOS XE Gibraltar 16.11.1 release, the option to manually disable the system thermal
shutdown has been introduced. This prevents the triggerring of the supervisor engine's action to turn off the
power supplies of the chassis even when the temperatures exceed the critical and shutdown temperatures. The
thermal shutdown disable feature allows you to bypass the system thermal shutdown process even when the
system has already reached the shutdown state.
Use the thermal shutdown disable command to configure the thermal shutdown disable option. Upon saving
the updated configuration to the start-up config, the system boots with the thermal shutdown disabled after
the next power-cycle or system reload.
Use the no thermal shutdown disable command to re-enable the system thermal shutdown feature.
The thermal shutdown disable feature does not fully support High Availibility. The following are two
unsupported cases:
• When thermal shutdown is disabled only on the active supervisor engine and if you boot the second
supervisor engine when the system reaches a shutdown state, the system will still shut down.
• When thermal shutdown is disabled on both supervisor engines and the system reaches a shutdown state,
if you re-enable the thermal shutdown feature, then the system will not shut down. The configuration
changes need to be saved to the start-up config and the switch needs to be reloaded for the changegs to
take effect.
The following table lists the possible combinations of the supervisor engine states and the thermal shutdown
disable configuration support for each of these states:
Table 23:
Support for Thermal Shutdown
Disable Configuration
Standby SupervisorActive Supervisor
• Not supported during boot-up
time.
• Supported during run time.
Shutdown StateShutdown State
• Not supported during boot-up
time.
• Supported during run time.
Shutdown StateNormal State
System Management Configuration Guide, Cisco IOS XE Bengaluru 17.4.x (Catalyst 9400 Switches)
226
Environmental Monitoring and Power Management
Disabling Thermal Shutdown

Cisco Catalyst 9400 Specifications

General

Brand	Cisco
Model	Catalyst 9400
Category	Switch
Language	English