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Cisco Bug: CSCul02786 - QoS traffic rate is off with fair-queue used in the child policy

Last Modified

Feb 02, 2017

Products (1)

  • Cisco ASR 1000 Series Aggregation Services Routers

Known Affected Releases

15.2(4)S 15.3(3)S 15.4(1)S 15.4(2)S

Description (partial) 

Symptom:
The original issue fails silently and it is only detected via traffic or inspecting the hierarchy via the CLI, show plat hard qfp act feat qos que out int <ifname> hier detail. The QoS rates are in accurate due to a bad hierarchy. Subsequent crashes and the issue that is documented in this DDTS were regression from the original fix intended to build the hierarchy on ESP-100 correctly. 

All issues involved fair-queue in a flat or hierarchical policy when  applied on the fly.

Conditions:
Applying fair-queue on the fly resulted in the bad hierarchy. As a result the provisioned services could not be guaranteed.
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