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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)

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.

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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