Hi, I try to measure the control flow impact on Open vSwitch performance while using in-band connections.
So in this task I need to count the messages sent from controller to every switch in the network that uses in-band control. I try to understand how the controller installs flows into Open vSwitch while using in-band connection. I've created an example topology using mininet and this article:http://tocai.dia.uniroma3.it/compunet-wiki/index.php/In-band_control_with_Open_vSwitch The topology contains 5 switches connected one-by-one (as show on the first picture of the article). The controller is launched on the h3 host. In my case the POX controller is used. And all is pingable. So when I try to sniff the traffic on s1 ... s5 interfaces, I see that OpenFlow messages (PacketIn, PacketOut etc) appear only on the s3 interface. On other interfaces I don't see any TCP or OpenFlow packets. But as 'ovs-vsctl dump-flows' command shows, the flow are automatically installed on switches. The question is how the controller installs new flows on s1, s2, s4, s5 switches? And how the controller messages are delivered to the switch that is not directly connected to controller? Thanks in advance. Edward _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
