The MX480 device encountered FPC Major Error Alarm along with the log/messages below:

fpc7 XMCHIP(0): XMCHIP(0): WO1: Protect: Log Error 0x1, Log Address 0x12, Multiple Errors 0x0

fpc7 CMError: /fpc/7/pfe/0/cm/0/XMCHIP(0)/0/XMCHIP_CMERROR_WO_MEM_PROTECT_FSET_REG_DETECTED_RXFC_FCSN (0x70384), scope: pfe, category: functional, severity: major, module: XMCHIP(0), type: WO_PROTECT: Detected: Parity error for Receive FCSN table

fpc7 Performing action get-state for error /fpc/7/pfe/0/cm/0/XMCHIP(0)/0/XMCHIP_CMERROR_WO_MEM_PROTECT_FSET_REG_DETECTED_RXFC_FCSN (0x70384) in module: XMCHIP(0) with scope: pfe category: functional level: major

fpc7 Performing action cmalarm for error /fpc/7/pfe/0/cm/0/XMCHIP(0)/0/XMCHIP_CMERROR_WO_MEM_PROTECT_FSET_REG_DETECTED_RXFC_FCSN (0x70384) in module: XMCHIP(0) with scope: pfe category: functional level: major

alarmd[63362]: Alarm set: FPC id=150996840, color=RED, class=CHASSIS, reason=FPC 7 Major Errors

craftd[23486]: Major alarm set, FPC 7 Major Errors

fpc7 Performing action disable-pfe for error /fpc/7/pfe/0/cm/0/XMCHIP(0)/0/XMCHIP_CMERROR_WO_MEM_PROTECT_FSET_REG_DETECTED_RXFC_FCSN (0x70384) in module: XMCHIP(0) with scope: pfe category: functional level: major

> show chassis alarms

1 alarms currently active

Alarm time Class Description

2024-06-24 03:51:55 UTC Major FPC 7 Major Errors

The logs indicate parity error for Receive FCSN table. The is due to an internal hardware issue in processing the specific packet on the XMCHIP. 

A one-time occurrence of this error, not seen with other events, does not indicate a HW problem.

This is a transient hardware error that is fixed after rebooting and/or reseating the affected FPC.

If the error logs do not clear then please open a case with JTAC .