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Cisco Bug: CSCun40637 - Virtual port Class of Service Queues wedged for Engine 3

Last Modified

Jul 21, 2018

Products (6)

  • Cisco 12000 Series Routers
  • Cisco IOS XR Software
  • Cisco XR 12410 Router
  • Cisco XR 12416 Router
  • Cisco XR 12404 Router
  • Cisco XR 12406 Router

Known Affected Releases


Description (partial)


Virtual port's Class of Service Queues gets wedged. Queues may no longer service traffic as per configuration. If queue gets completely wedged, then traffic forwarding on that interface may experience degraded performance.



Issue happens when Min BW virtual port property gets wrongly programmed in hardware asic.

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