Dying Gasp OmniSwitch 6250 Chassis and Hardware Components
page 3-34 OmniSwitch 6250 Hardware Users Guide September 2015
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.
• When a reload command is issued.
• When a takeover command is issued.
Note. Dying gasp will not work when both primary and backup power supplies fail simultaneously.
Connect each power supply to a separate independent power source to avoid simultaneous power failures.
SNMP Trap
As soon as the power failure is detected, an SNMP trap is sent to the first three configured SNMP stations.
The trap includes the following information:
• Slot number
• Power supply type (primary/backup)
• Time of the failure
Use the snmp station command and refer to the SNMP Configuration chapter for information on config-
uring an SNMP station.
Syslog Message
As soon as the power failure is detected, a Syslog message is sent to the first four configured Syslog serv-
ers. The message includes the following information:
• Syslog message "Dying Gasp Power Failure Event Occurred" along with the time of the failure.
Use the swlog output socket command and refer to the Using Switch Logging Configuration chapter for
information on configuring a Syslog server.
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