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This test will create multiple switches connected to one controller. Datapath depends on the flow tables needed, through some triggering means (such as ping) will trigger the flows download, when all the switches have these flow table entries, datapath can be setup successfully.

There's two content should measure:By capture, the time can be caculated by the packets below

      1、The maximum first packet_out ratein packet

      2、The latency of packet_out

We configure one million packet_in packets on the IxNetwork and send them to the controller through different rates to analyze the packet_out rate and latency.

last flow_mod packet

The test was done by different number of switches with the sequence of 100、200、300、400 The rate is in accordance with the sequence 5000、10000、15000、20000 ... ...

Suggestions

1. The transmission frequency of packet_in
   We suggest the packet_in interval is 50ms, that is 20 copies of packet_in messages are send in one second, every copy contains numbers of packet_in packets, and this can be configured in IxNetwork.
2. Environment
   This test result depends on the test environment, the results measured in different environments will be very different, in the VM environment and the physical environment the results of the test difference of nearly 10 times.

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