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Cisco Bug: CSCvh70356 - ASR1K - ECMP load-balance w/ DPI L2TP Tunnel visibility and QoS may generate ucode crash

Last Modified

Aug 09, 2019

Products (153)

  • Cisco ASR 1000 Series Aggregation Services Routers
  • Cisco Catalyst 3650-48TQ-L Switch
  • Cisco Catalyst 3850-24U-L Switch
  • Cisco NCS 4202
  • Cisco Catalyst 3650-24PD-E Switch
  • Cisco Catalyst 3850-12S-E Switch
  • Cisco Catalyst 3650-24PDM-E Switch
  • Cisco Catalyst 9300-48T-A Switch
  • Cisco Catalyst 3650-8X24UQ-E Switch
  • Cisco Catalyst 3850-48P-E Switch
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Known Affected Releases

Everest-16.6.1

Description (partial)

Symptom:
ASR1K LNS utilizing  QoS with ECMP Tunnel visibility for L2TP may result in following crash events reported in the router logs:

 %CPPHA-3-FAULT:  F0: cpp_ha_top_level_server:  CPP:0.1 desc:CRM_CSR32_CRM_ERR_BLK_LEAF_INT__INT_ILLEGAL_DATA_LENGTH_ERR det:DRVR(interrupt) class:OTHER sev:FATAL id:4007 cppstate:RUNNING res:UNKNOWN flags:0x7 cdmflags:0x0

%CPPHA-3-FAULTCRASH:  
Username: F0: cpp_ha_top_level_server:  CPP 0.1 unresolved fault detected, initiating crash dump.

 %CPPDRV-3-LOCKDOWN:  F1: cpp_cp_svr:  QFP0.0 CPP Driver LOCKDOWN encountered due to previous fatal error ((null): (null)).

%CPPHA-3-FAULT:  F0: cpp_ha_top_level_server:  CPP:0.0 desc:CPP Client process failed: FMAN-FP det:HA class:CLIENT_SW sev:FATAL id:1 cppstate:RUNNING res:UNKNOWN flags:0x0 cdmflags:0x0

Conditions:
LNS router must have / utilize

QoS / Per-session QoS
ECMP load-balancing with Tunnel visibility / DPI for L2TP with following config:

ip cef load-sharing algorithm dpi tunnel-l2tp <1-FFFFFFFF>   Fixed ID
ip cef load-sharing key-control dpi tunnel-l2tp ignore-outer-ip ignore-outer-port inner-src-dst-ip inner-src-dst-port
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Bug Details Include

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