Preview Tool

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

Last Modified

Jan 19, 2020

Products (13)

  • Cisco IOS
  • Cisco 4221 Integrated Services Router
  • Cisco 4331 Integrated Services Router
  • Cisco 4431 Integrated Services Router
  • Cisco 4321 Integrated Services Router
  • Cisco Cloud Services Router 1000V
  • Cisco 4451-X Integrated Services Router
  • Cisco 4351 Integrated Services Router
  • Cisco ASR 1000 Series Route Processor (RP2)
  • Cisco ASR 1002-HX Router
View all products in Bug Search Tool Login Required

Known Affected Releases

15.5(3)S5.1 16.8.1

Description (partial)

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

The dot1Q configuration change triggers the reload when used in combination with:
  *   QoS
  *   Port-channel sub interfaces
  *   Bandwidth configuration
Bug details contain sensitive information and therefore require a account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.