Chassis and Power Supplies Dying Gasp
OmniSwitch 6560 Hardware Users Guide December 2019 page 3-45
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
• Verifying that the warning threshold has not been manually set too low.
Temperature Danger Threshold
If the chassis ambient air temperature rises above the danger threshold, 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
• Checking the ambient room temperature
Dying Gasp
If the switch loses all power it will maintain power long enough to send a Dying Gasp message before
completely shutting down. An SNMP trap, Syslog message and Link OAM PDUs will be generated.
Scenarios
A Dying Gasp event will be generated in the following scenarios:
• Primary power supply failure (if only power supply present)
• Primary power supply failure and then backup power supply failure
• Backup power supply failure and then primary power supply failure
Note. Connect each power supply to a separate independent power source to avoid simultaneous
power failures.
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