Description

This article explains how to troubleshoot the "MQSS_CMERROR_DRD_TOP_ECC2_PROTECT_FSET_REG_CORRECTED_FL_FIFO_MEM0" error message. 

Symptoms

When you see a MQSS_CMERROR_DRD_TOP_ECC2_PROTECT_FSET_REG_CORRECTED_FL_FIFO_MEM0, a message similar to the following is reported:

Feb 21 02:32:29 router fpc2 Error: /fpc/2/pfe/0/cm/0/MQSS(1)/1/MQSS_CMERROR_DRD_TOP_ECC2_PROTECT_FSET_REG_CORRECTED_FL_FIFO_MEM0 (0x2203ad), scope: pfe, category: functional, severity: minor, module: MQSS(1), type: DRD_TOP_ECC2_PROTECT: Corrected: FL FIFO MEM0 
Feb 21 02:32:29 router fpc2 Performing action log for error /fpc/2/pfe/0/cm/0/MQSS(1)/1/MQSS_CMERROR_DRD_TOP_ECC2_PROTECT_FSET_REG_CORRECTED_FL_FIFO_MEM0 (0x2203ad) in module: MQSS(1) with scope: pfe category: functional level: minor 
Feb 21 02:32:29 router fpc2 Performing action cmalarm for error /fpc/2/pfe/0/cm/0/MQSS(1)/1/MQSS_CMERROR_DRD_TOP_ECC2_PROTECT_FSET_REG_CORRECTED_FL_FIFO_MEM0 (0x2203ad) in module: MQSS(1) with scope: pfe category: functional level: minor 
Feb 21 02:32:29 router fpc2 Cmerror Op Set: MQSS(1): MQSS(1): DRD: Protect 2: Parity error corrected for free list FIFO memory 0 - data32_log_err 0x100, data32_log_address 0x31 (URI: /fpc/2/pfe/0/cm/0/MQSS(1)/1/MQSS_CMERROR_DRD_TOP_ECC2_PROTECT_FSET_REG_CORRECTED_FL_FIFO
Feb 21 02:32:29 router chassisd[8696]: CHASSISD_FPC_ASIC_ERROR: <FPC 2> ASIC Error detected errorno 0x002203ad (null)
Feb 21 02:32:29 router alarmd[9251]: Alarm set: FPC id=167772776, color=YELLOW, class=CHASSIS, reason=FPC 2 Minor Errors
Feb 21 02:32:29 router craftd[8699]: Minor alarm set, FPC 2 Minor Errors

FPC may report a Minor Alarm with error code: 0x2203ad. The error code will be displayed under the output "show chassis alerts" depending on the Junos version running on the device.

user@router> show chassis alarms no-forwarding

1 alarms currently active
Alarm time               Class  Description
2024-02-21 02:32:29 EST  Minor  FPC 2 Minor Errors

You can log in to the FPC shell to find the error code if the chassis alarms output does not show the error code as below:
 
MPC2(router-re0 vty)# show cmerror module

Module-id Name  Error-id   PFE Level Threshold Count Occurred Cleared Last-occurred(ms ago) Name

-----------------------------------------------------------------------------------------------------------

  26 MQSS(1)

         0x2203ad   1  Minor   1    1    1     0    42003634      MQSS_CMERROR_DRD_TOP_ECC2_PROTECT_FSET_REG_CORRECTED_FL_FIFO_MEM0

 

Solution

The shell logs indicate there is an active minor alarm.

The Minor errors observed on the FPC are because of an isolated occurrence of transient parity errors in the internal FIFO memory.

Perform the following steps to determine the cause and resolve the problem (if any). Continue with each step until the problem is resolved.
1. Capture the below output .
 
show log messages
show log chassisd
start shell pfe network <fpc#>
show cmerror module
show nvram
show syslog messages
exit

2. Analyze show command output. In the show log messages output. Review the events that occurred at or just before the appearance of the "MQSS_CMERROR_DRD_TOP_ECC2_PROTECT_FSET_REG_CORRECTED_FL_FIFO_MEM0" message. These events can often help determine the cause. CMERRORS are mostly active even if the condition does not exist anymore. A single incident does not require a RMA. The alarm can be cleared for a single event by using this command:

clear chassis fpc errors fpc-slot  <x> all

3. The next step is to reset the FPC if the logs still appear after the clear command. If the error message does not disappear, please contact your JTAC Representative to further investigate.
 

Modification History

2024-02-23: Initial version