This article explains the meaning of the alarm, 'Vsensor 11:PE0 AVDD 1.0V Beyond Margin​' and how to clear it.

The following alarm is seen on PTX and QFX devices:

XX@XXXX> show chassis alarms no-forwarding

2 alarms currently active
Alarm time Class Description
2024-02-27 09:43:46 UTC Major Vsensor 11:PE0 AVDD 1.0V Beyond Margin
2024-02-27 09:43:06 UTC Major Vsensor 30:PE4 AVDD 1.0V Beyond Margin

This alarm is due to the PE chip of the FPC utilizing more power than the amount allocated by the FPC, causing the temperature to rise. For power and temperature alarms, use the 'show chassis environment fpc' operational mode command to obtain detailed information on the internal state of the chassis:

XX@XXXX> show chassis environment fpc

FPC 0 status:

 State Offline

 Temperature 22 degrees C / 71 degrees F

 Voltage:

 PE0 VDD Core 0.9V 950 mV

 PE0 HMC VDD 0.9V 909 mV

 PE0 HMC AVDD 1.2V 1200 mV

 PE1 VDD Core 0.9V 976 mV

 PE1 HMC VDD 0.9V 908 mV

 PE1 HMC AVDD 1.2V 1199 mV

 PE2 VDD Core 0.9V 950 mV

 PE2 HMC VDD 0.9V 908 mV

 PE2 HMC AVDD 1.2V 1199 mV

 HMC VDD 1.2V 1211 mV

 VDD 3.3V 3299 mV

 PE0 AVDD 1.0V 351 mV

 PE1 AVDD 1.0V 999 mV

 PE2 AVDD 1.0V 1000 mV

 PF0 AVDD 1.0V 1000 mV

 PF0 VDD Core 1.0V 950 mV

 CPE VDD 1.0V 1000 mV

 VDD 1.5V 1500 mV

 PE3 VDD Core 0.9V 899 mV

 PE3 HMC VDD 0.9V 908 mV

 PE3 HMC AVDD 1.2V 1199 mV

 PE4 VDD Core 0.9V 950 mV

 PE4 HMC VDD 0.9V 908 mV

 PE4 HMC AVDD 1.2V 1199 mV

 PE5 VDD Core 0.9V 925 mV

 PE5 HMC VDD 0.9V 908 mV

 PE5 HMC AVDD 1.2V 1199 mV

 Mezz HMC VDD 1.2V 1199 mV

 Mezz VDD 3.3V 3299 mV

 PE3 AVDD 1.0V 1000 mV

 PE4 AVDD 1.0V 7 mV

 PE5 AVDD 1.0V 1000 mV

 PF1 AVDD 1.0V 1000 mV

 PF1 VDD Core 1.0V 975 mV

 Mezz VDD 2.5V 2499 mV

 Mezz VDD 1.5V 1500 mV

XX@XXXX>

Once the PE chip exceeds its allocated power and the alarm is raised, then the Chassis will reboot the desired FPC (Flexible PIC Concentrator) in order to self-heal and clear the alarm. In the case of a stand-alone device, the chassis will reboot the RE (Routing Engine) to make an attempt to self-heal the issue.

If the alarm is not cleared post-reboot, then it is an indication of an issue with one of the power components on the board. The issue could be with a power component called MOS-FET (transistor). This needs an RMA of the chassis.