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Cisco Bug: CSCvh71856 - IOSd crash when dot1q is used in combination with QoS or PortChannel subinterfaces

Last Modified

Aug 22, 2019

Products (13)

  • Cisco IOS
  • Cisco 4221 Integrated Services Router
  • Cisco 4431 Integrated Services Router
  • Cisco 4331 Integrated Services Router
  • Cisco 4321 Integrated Services Router
  • Cisco 4351 Integrated Services Router
  • Cisco Cloud Services Router 1000V
  • Cisco 4451-X Integrated Services Router
  • Cisco ASR 1000 Series Route Processor (RP2)
  • Cisco ASR 1002-HX Router
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Known Affected Releases

15.5(3)S5.1 16.8.1

Description (partial)

Symptom:
The affected device reloads shortly after a change is applied to dot1q, TAC assistance is needed to determine the root cause of the failure.

The crash file shows that the command was used before the fatal condition:

Router#more bootflash:crashinfo_RP_00_00_YYMMDD-HHmmss-TZ
...
CMD: 'no encapsulation dot1Q '
Exception to IOS Thread

Conditions:
The dot1Q configuration change triggers the reload when used in combination with:
  *   QoS
  *   Port-channel sub interfaces
  *   Bandwidth configuration
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Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
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