[Tutorial] How to setup QoS on Open vSwitch

There are two ways to do that:

1. Interface Rate Limiting ( on Interface )
  • For instance:
         > sudo ovs-vsctl set Interface eth1 ingress_policing_rate=10000
         > sudo ovs-vsctl set Interface eth1 ingress_policing_burst=1000

 2. Port  QoS Policy ( on Port )
  • For instance:
         > sudo ovs-vsctl set port eth1 qos=@newqos \
             -- --id=@newqos create qos type=linux-htb \
             other-config:max-rate=200000000 queues=0=@q0,1=@q1 \
             -- --id=@q0 create queue \
             other-config:min-rate=100000000 \
             other-config:max-rate=100000000 \
              -- --id=@q1 create queue \
             other-config:min-rate=50000000 \
  • Qos can have more than 1 queue


Marco said…
Have you tested the point 1 - 1. Interface Rate Limiting ( on Interface )?

Because I have tested with the configuration equal to what you have and the rate limitation do not work.

Have you tested with netperf or iperf?

Thank you for your question. Actually I didn't test this. But, my information is from Open vSwitch offical web site as the following URL:
They indeed do the test with netperf and it indeed works.

Marco said…

Thanks for the tip.

In point 2 in the command is really necessary after the "...type=linux-htb" the command "other-config:max-rate=200000000"?
What for the "other-config:max-rate=200000000" is used if the queues have there one "other-config:max-rate" defined?

Can you advise me?

Best Regards,
About point 2, it is related with Port QoS Policy. A port could be assigned more than one QoS policy. So it is the reason why my example has 2 queues with that port. You definitely can remove them once your QoS setting is fitted for your requirement. For more information in details, please refer to this URL:
At page 22 ~ 26, you will see more explaination there.
lanny wan said…
hi danny..
did u try that QoS configuration?
now i'm trying to implement it onto my network within my tap interface, n i use ingress policing, but it failed,

n if i limiting using egress, it only worked for eth not for my tap.

if u suceed make it using those conf, can u explain me why my conf getting fail?
i've already asking this question on OVS mailing list, but still couldn't get the fit answer,,

Hi lanny,
As I mentioned in early comment, I didn't test in real case. Sorry! Why I survey QoS is because I once wanted to add extension QoS function in Quantum OVS plug-in. But, I didn't do it.
I don't know your configuration. Could you let me see yours?

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