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Cisco Bug: CSCuo14345 - [CRS1/3 MC8+2] - sfe_drvr process crashed by wdsysmon on high CPU utili

Last Modified

Jul 21, 2018

Products (1)

  • Cisco Carrier Routing System

Known Affected Releases

5.1.3.BASE

Description (partial) 

Symptom:
In CRS-1/3 MC system, the sfe_drvr process was crashed due to high CPU utilization by wdsysmon on multiple S13 fabric cards. And also sysylogs like plane config missing & couldn't enqueue into ISR atomic ring are seen.

Conditions:
The sfe_drvr process was seen after shutting-down a fabric plane and reloading all the S13 fabric cards of that plane one by one.

The reload of fabric cards was causing interrupt storm on neighboring s1ro OOB links. So while sfe_drvr was handling the storm of interrupts, it hogged the CPU. Hence wdsysmon crashed it.
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