Customers encountered this alarm during the new RMA boot-up and were unable to execute any commands related to the chassis.

PTX> show chassis alarms

Alarm time Class Description
2024-12-10 23:33:19 PST Major Application hwdre fail on node Re0

• The HWDRE application in EVO is equivalent to chassisd in JUNOS where it has the following functions - 
  • Hardware presence/absence detection
  • FRU Management
  • Hardware environmental monitoring (temperature & Voltage)
  • System Cooling
  • Power Management
  • Clock Synchronization

• Based on the alarm, the customer attempted to restart the hwdre daemon using the command systemctl restart hwdre. After restarting the daemon, we discovered that the device entered a boot loop.

• Upon reviewing the boot logs, we identified a faulty PSM that was causing the issue. After removing the PSM and rebooting the device, it started up without any further problems.