User guide

Chassis and Power Supplies Monitoring Chassis Temperature
OmniSwitch 6900 Hardware Users Guide December 2013 page 2-39
Temperature Errors
The switch monitors the ambient air temperature at all times via an onboard sensor. If an over-temperature
condition occurs, there are two different levels of error severity:
• Warning threshold has been exceeded
• Danger threshold has been exceeded
Warning Threshold
If the temperature exceeds the switch’s user-configurable warning threshold, the switch sends out a trap.
Traps are printed to the console in the form of text error messages.
When the warning threshold has been exceeded, switch operations remain active. However, it is
recommended that immediate steps be taken to address the over-temperature condition.
Addressing warning threshold temperature conditions may include:
• Checking for a chassis airflow obstruction
• Checking the ambient room temperature
• Checking the fan tray status using the show fan command. See page page 2-39 for more information.
• Verifying that the warning threshold has not been manually set too low.
Note. For the OS6900’s default warning threshold value, refer to the specifications on page 2-2. The
default value may be configured using the temp-threshold command; the currently-configured warning
threshold may be viewed using the show fantray command.
Temperature Danger Threshold
If the chassis ambient air temperature rises above the danger threshold (see specifications on page 2-2) the
switch will power off until the temperature conditions have been addressed and the switch is manually
booted. The danger threshold is factory-set and cannot be configured by the user.
Addressing danger threshold temperature conditions may include:
• Checking for a chassis airflow obstruction or direction mismatch.
• Checking the ambient room temperature
• Checking the fan tray status using the show fan command. See page page 2-39 for more information.
Monitoring Fan Tray Status
The switch constantly monitors fan operation. If any of the switch’s fans unexpectedly shuts down, the
switch sends out a trap and the FAN LED on the chassis front panel displays amber.
To check the switch’s current fan tray status, use the show fan command. For example:
-> show fan
For more information about this command, see the “Chassis Management and Monitoring Commands”
chapter in the OmniSwitch CLI Reference Guide.