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Cisco Bug: CSCvi77419 - Standby supervisor crash with DPE0_CPE_CSR32_DPE_CPE_ERR_LEAF_INT__INT_CPE_APT_WP_ERR interrupt

Last Modified

Sep 25, 2018

Products (1)

  • Cisco cBR Series Converged Broadband Routers

Known Affected Releases

15.6(2)SP

Description (partial)

Symptom:
Standby supervisor in cBR-8 chassis may reload unexpectedly due to dataplane microcode crash. Logs similar to the following may be observed:

<pre>Mar  7 07:18:51.744 EST: %CPPHA-3-FAULTCRASH: CLC5: cpp_ha:  CPP 0.0 unresolved fault detected, initiating crash dump.
Mar  7 07:18:51.745 EST: %CPPHA-3-FAULTCRASH: CLC5: cpp_ha:  CPP 0.0 unresolved fault detected, initiating crash dump.
Mar  7 07:18:51.746 EST: %CPPDRV-6-INTR: CLC5: cpp_driver-0:  Yoda(0) Interrupt : 18-Mar-07 07:18:51.742622 UTC-0500:FIRST:DPE0_CPE_CSR32_DPE_CPE_ERR_LEAF_INT__INT_CPE_APT_WP_ERR 
Mar  7 07:18:51.749 EST: %CPPDRV-3-LOCKDOWN: CLC5: cpp_cp:  QFP0.0 CPP Driver LOCKDOWN encountered due to previous fatal error (HW: QFP interrupt).</pre>

The presence of the DPE0_CPE_CSR32_DPE_CPE_ERR_LEAF_INT__INT_CPE_APT_WP_ERR interrupt in the log is the key symptom and indicates that an attempt was made to write to write-protected memory.

Conditions:
Trigger conditions are not known at this time.

At this time this crash has only been observed on a standby supervisor. It is not yet known if the active supervisor could be affected by the same problem. This will be updated once that is determined.
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