The article explains the meaning of PECHIP_CMERROR 0x210531 raised on FPC. The article also explains steps to overcome the alarm.

Major alarm is raised on FPC:

1 alarms currently active
Alarm time        Class Description
2024-04-07 01:45:23 UTC Major FPC 0 Major Errors

Message logs:

/fpc/0/pfe/0/cm/0/PE_Chip/1/PECHIP_CMERROR_FABRORD2_PAR_PROTECT_DET_RWSZ_L1_TO (0x210531), scope: pfe, category: processing, severity: major, module: PE Chip, type: Description for PECHIP_CMERROR_FABRORD2_PAR_PROTECT_DET_RWSZ_L1_TO

Apr 7 01:45:28 2024 LAB_RE0 fpc0 Performing action get-state for error /fpc/0/pfe/0/cm/0/PE_Chip/1/PECHIP_CMERROR_FABRORD2_PAR_PROTECT_DET_RWSZ_L1_TO (0x210531) in module: PE Chip with scope: pfe category: processing level: major

Apr 7 01:45:28 2024 LAB_RE0 fpc0 Performing action cmalarm for error /fpc/0/pfe/0/cm/0/PE_Chip/1/PECHIP_CMERROR_FABRORD2_PAR_PROTECT_DET_RWSZ_L1_TO (0x210531) in module: PE Chip with scope: pfe category: processing level: major

Apr 7 01:45:28 2024 LAB_RE0 fpc0 Cmerror Op Set: PE Chip: PE1[1]: FABRORD[2-GNT]:ecc: 0x000007f8: RWSZ_L1 for timeout  

CMERROR active on FPC:

FPC0(LAB_RE0 vty)# show cmerror module brief
-------------------------------------------------------------------------
Module Name    Active Errors PFE  Callback ModuleData
           Specific Function     
-------------------------------------------------------------------------
11  PE Chip   12    Yes  0x10e8a188 0x00000000




FPC0(LAB_RE0 vty)# show cmerror module

0x210531   1  Major   1    6    6    0    4601573       PECHIP_CMERROR_FABRORD2_PAR_PROTECT_DET_RWSZ_L1_TO

The log below indicates the PE chip 1 error.

Apr 7 01:45:28 2024 LAB_RE0 fpc0 Cmerror Op Set: PE Chip: PE1[1]: FABRORD[2-GNT]:ecc: 0x000007f8: RWSZ_L1 for timeout

1. PE chip error on the Packet Forwarding Engine (PFE)
2. Timeout in Timestamp database

These alarms are due to the Timeout in the Timestamp database which might occur during Fabric Re-ordering. If the PFE is active, the corrupted memory location will be overwritten with the correct timestamp on the new incoming fabric cell.

Ideally, these errors are non-impacting in nature.

To Clear the alarm:

Restart the FPC to clear the alarm:

user@host >request chassis fpc restart slot <slot-number>

Here,

user@host> request chassis fpc restart slot 0

or

user@host >request chassis fpc slot <slot-number> offline

user@host> request chassis fpc slot <slot-number> online

Verify the device alarm:

Once the restart is done, verify the outputs again to see the issue is cleared. 

user@host> show chassis alarms   
user@host> request pfe execute command “show cmerror module brief” target fpc1