Cisco Bug: CSCvi77419 - Standby supervisor crash with DPE0_CPE_CSR32_DPE_CPE_ERR_LEAF_INT__INT_CPE_APT_WP_ERR interrupt
May 21, 2018
- Cisco cBR Series Converged Broadband Routers
Known Affected Releases
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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