This article explains how to troubleshoot, when you find FPC major error with the XMCHIP error code 0x70067 on the MX devices.

We might encounter the below parity errors on the XMCHIP by error detection or checksum:

> show chassis alarms no-forwarding

1 alarms currently active

Alarm time    Class Description

2024-08-20 08:40:23 ICT Major FPC 5 Major Errors - XM Chip Error code: 0x70067

Aug 20 08:40:23 MX fpc5 Cmerror Op Set: XMCHIP(1): XMCHIP(1): DDRIF: LLISTQ Protect: Parity error for free checksum SRAM (0x1) 

Aug 20 08:40:23 MX alarmd[16716]: Alarm set: FPC color=RED, class=CHASSIS, reason=FPC 5 Major Errors - XM Chip Error code: 0x70067

Aug 20 08:40:23 MX craftd[16303]: Major alarm set, FPC 5 Major Errors - XM Chip Error code: 0x70067

• A single occurrence of the above syslog events occurs, then it indicates a one-time hardware error. 
• Traffic or permanent packet forwarding on the Packet Forwarding Engine (PFE) may be impacted if the errors are seen repeatedly
• Multiple continuous occurrences indicate persistent underlying HW issues

Recommendation is to restart the FPC during the MW to clear the errors.

If the error persists, after restarting the FPC then the hardware has to be replaced.