Issue: Link error on FPC
4 FPC RMA have been done for the issue however the alarm fails to clear. FPC & SFB has been replaced.
Although, Alarm has not been cleared and we are still observing link error on FPC7.
JTAC> show chassis alarms
May 16 11:51:55
1 alarms currently active
Alarm time Class Description
2025-05-16 04:42:49 IST Minor Check plane 1 Fabric Chip
JTAC> show chassis fabric summary
May 16 11:52:21
Plane State Uptime
0 Online 8 hours, 11 minutes, 49 seconds
1 Check 7 hours, 21 minutes, 35 seconds
FPC 7
PFE #0
Plane 0: Plane enabled
Plane 1: Plane disabled (TF)
PFE 0 :Link error (TF)
PFE 1 :Links ok
As per the logs, the issue was still pointing to FPC. But since customer had already replaced FPC & fabric cards, we cannot RMA them again.
Also customer faced FPC failure due to 'Hard Errors' in same slot as well.
The issue got resolved when the FPC was moved to different slot.
Hence, upon taking Photos of FPC slot, we could see ping bents inside the slot on mid-plane.
So the only option was to replace the mid-plane.