Description

      The purpose of the test is to measure the performance of OpenFlow controller channels with a single or cluster controllers. Multiple switches are setuped up by IxNetwork, and directly connected to controllers by TCP connection.   

      There are two items we should measure:

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      2、The maximum number of OF channels can be support coinstantaneous by controllers.

      We measure the establish time by the time interval between the first Hello Message and the last Hello Message of these switches.The maximum number of OF channels measure by a time interval  without any session flap, and the time interval is recommended as 5 minutes.

      For single mode, we done the test repeated by different number of switches with the sequence of 500、1000、1500、2000 ……

      For cluster mode, we done the test repeated by different number of switches with the sequence of 100、200、300、400 ……

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      8. Clean the configuration of controllers and IxNetwork.

      9. Repeat the test with same switches for three times.

      10. Restart the test with another number of switches.

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• Single Mode 

  Devices	First	Second	ThridThird	Average(S)
  500S500s	1.02	1.42	1.17	1.20
  1000S1000s	2.13	2.18	2.03	2.11
  1500S1500s	2.56	3.42	3.39	3.12
  2000S2000s	4.74	4.42	4.86	4.67
  2500S2500s	5.74	5.39	5.72	5.62
  3000S3000s	6.38	7.54	7.61	7.18
  3500S3500s	7.64	9.05	8.65	8.45

  After 3500 switches, the OF channels become unstable, the flap sessions come frequently with the increase of time. So the maximum number of OF Channel with single controller is 3500. 

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  We can see from the histogram, the establish time is linear growth with the number of OF switches.

• Cluster Mode(Three nodes)

  Devices	First	Second	Thrid	Average(S)
  100S100s	1.25	0.52	0.52	0.76
  200S200s	1.7	0.85	0.81	1.12
  300S300s	1.21	0.89	1.33	1.14
  400S400s	1.23	1.27	1.19	1.23
  500S500s	1.52	1.76	1.6	1.63
  600S600s	2.31	2.08	1.45	1.95

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  To Be continued...