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Cisco Bug: CSCvr96849 - System power-off after removing CLI for ignition undervoltage threshold

Last Modified

Sep 24, 2020

Products (1)

  • Cisco 800 Series Routers

Known Affected Releases


Description (partial)

The undervoltage threshold is set to 31.1v if no ignition undervoltage threshold CLI in the configuration and ultimately results in system power-off.

The valid range for "Undervoltage threshold" should be 9V ~ 24V. 

IR829(config)#no ignition undervoltage threshold
[ignition_event - input power undervoltage is triggering a shutdown] 
Powering down cellular modem, please wait...
Powering down cellular modem, please wait...
%IGNITION-4-IGN_UNDER_VOLTAGE: The input voltage is at 12.2 V. The undervoltage threshold of 31.1 V has been tripped recently. Shutdown sequence will begin.
%CELLULAR-2-MODEM_DOWN: Cellular0 modem is now DOWN.
%IGNITION-5-IGN_RELOAD_SYS: The Ignition Power Management is preparing for shutdown
%SYS-5-RELOAD: Reload requested by IGNITION. Reload Reason: Ignition Power Management - low voltage.
%IR800_ENV-5-IR800_VDS_NOTIFIED_GOS_SHUTDOWN: Notified VDS for graceful shutdown.
Modems already powered down!
%IR800_ENV-5-IR800_VDS_GOS_ACK_SHUTDOWN: Received ack from VDS. Now it is shutting down.
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