H-QoS not working on Cat9K

[raoulms87]

Hello,

We have a new internet link that we would like to apply QoS on, the physical link is 10Gb but our bandwidth is 3Gb so we tried applying H-QoS. Upon testing, using iperf, we noticed that with H-QoS applied we were only getting around 1.5Gb/s throughput, when we remove it we get our expected 3Gb/s. Does anyone know why this is? Config below;

Policy Map child-qos
Class voice
priority level 1
Class voice-signalling
bandwidth remaining 1 (%)
Class control
bandwidth remaining 5 (%)
Class video
bandwidth remaining 20 (%)
Class P1-critical
bandwidth remaining 30 (%)
Class p2-business-services
bandwidth remaining 20 (%)
!
Policy Map parent-qos
Class class-default
Average Rate Traffic Shaping
cir 3000000000 (bps)
service-policy child-qos
!
interface TenGigabitEthernet1/0/40
service-policy output parent-qos
!

Thanks

[Joseph W. Doherty]

Unable to say for sure, but you shaper might not be allowing sufficient buffers for microbursts.

[Sebastian Fernandez]

Hi @raoulms87 

Please submit out for 'show policy-map interface' to see where is congestion happening. You iPERF results may vary depending upon which class you choose to test on.

Please rate this post.

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Sebastian