[email protected]> show chassis alarms 

1 alarms currently active

Alarm time        Class Description

2024-05-16 17:30:25 UTC Minor FPC 3 Mismatch in total memory detected

FPC X minor alarm will be triggered

The cause is due to either a transitive or permanent hardware error on the specified FPC.  

Perform following steps to determine the cause and resolve the problem (if any). 

• Collect the show command outputs.

  Capture the outputs. To do this, configure each SSH client/terminal emulator to log your session.

  show system error active
show system core-dumps

  show chassis fpc

• Under linux shell:

  journalctl --list-boots 

  journalctl -b | grep jnx-connector | grep fpc

  show_trace.py -a hwdre -p xxxxx | grep "Chassis\[0\]/Fpc\[0\]"



• Check for any associated core dumps at or just before the time of the Alarm event.

  If there is an associated core dump recorded with this fpc

• Analyze the show command output.

  In the 'show log messages', review the events that occurred at or just before the appearance of the "ALARM" message. 

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May 16 17:30:25  igw123.PTX-fpc3 platform-monitor[19544]: Found 15796652 KB memory. Expected around 32000000 KB
May 16 17:30:25  igw123.PTX-fpc3 emfd-fpa[16825]: EMF_FPA_FAULT_REP: createFault: Fault(Location: /Chassis[0]/Fpc[3] Module: platform Object: mem Error: 21) reported
May 16 17:30:25  igw123.PTX-fpc3 emfd-fpa[16825]: EMF_EVO_ALARM_SET: Alarm set: FPC color=yellow, class=CHASSIS, reason=FPC 3 Mismatch in total memory detected
May 16 17:30:25  igw123.PTX-fpc3 emfd-fpa[16825]: EMF_FPA_ALARM_REP: RaiseAlarm: Alarm(Location: /Chassis[0]/Fpc[3] Module: platform Object: mem Error: 21) reported

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• During a maintenance window, as it will impact transit traffic, try the following:

  • Reset the specific hardware reporting the error. 

    Run the CLI command ‘ request chassis fpc slot # offline ’,
    Wait 30 seconds.
    Then follow UP with the CLI command ‘ request chassis fpc slot # online ’.
    
    

  • Reseat the FPC in its slot, then check the result as below.

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show chassis fpc 

                     Temp  CPU Utilization (%)   CPU Utilization (%)  Memory    Utilization (%)
Slot State            (C)  Total  Interrupt      1min   5min   15min  DRAM (MB) Heap     Buffer
<snipped>
  3  Online            50      3          0             3        3            3      16384            39          1 <<<< still the half memory size compared with other good LC1201 module.

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• Swap the FPC with a spare part with a RMA being created.

reference case:2025-0512-694463