Description

In some rare scenarios we noticed that QFX10k went down. This KB is to capture behaviour noticed on the device based on the logs and possible next steps we can take to overcome this.

Symptoms

Jun 1 08:58:27 2025 INVIRGJ10GNR01SPNE01JP fpc0 cmqfx: Fatal errors detected for PFE 2 

Jun 1 08:58:27 2025 INVIRGJ10GNR01SPNE01JP fpc0 cmqfx: Link errors detected for PFE 2 Plane 0 sc : 0 

Jun 1 08:58:27 2025 INVIRGJ10GNR01SPNE01JP fpc0 CCL: Logging statistics for PE-2-chan-rx0-sc14       

Jun 1 08:58:27 2025 INVIRGJ10GNR01SPNE01JP fpc0 CCL: SOT:0x4824366536033945089 

Jun 1 08:58:27 2025 INVIRGJ10GNR01SPNE01JP fpc0 CCL: FrameCnt:0x0000290723372801 

Solution

These logs indicates possible hardware failure in ASIC, SerDes, or signal integrity path. Exact trigger for this is unknown. However this can be triggered due to electrical failures (this can be checked). However if the device is down and failing to get operational we can proceed with RMA’ing the device.

Modification History

2025-06-30 : Article Created