On Tue, 18 Sep 2018 21:07:41 +0900, Soe Ye Htet wrote: > > Dear, > > Please let me extend my case in this problem. The real wireless network > topology I have applied is Gateway1------Node 1------Node > 2--------Gateway2. RYU controller is installed in Gateway 1. The control > type is in-band control type by sharing Control TCP packet and Data TCP > packet on the same physical wireless interface. Then the experiment has > been executed to investigate about the TCP wireless link throughput. At the > side of Gateway1, iperf -s is executed. At the side of Node 1, iperf -c <ip > address of gateway1> -t 10000 -i 10. At the side of Gateway2, iperf -s is > executed. At the side of Node 2, iperf -c <ip address of gateway2> -t 10000 > -i 10. Strangely, the iperf testing between Gateway 1 and Node 1 is stopped > at the time of 1000 seconds while the iperf testing between Gateway 2 and > Node 2 can be executed up 10000 seconds. I define the same flows for iperf > testing at the gateway 1 and gateway 2. For eg, i define the flow rules for > TCP at gateway 1 to receive the TCP packet from node 1. I also define the > same way of flow rules for TCP at gateway 2 to receive the TCP packet from > node 2. If anyone face same kind of issue, please let me know your > experience in solving for this problem.
You seem to have already asked at the iperf mailing list. Unless you changed the flow tables during the experiment, I don't think ovs is an issue. You might be able to confirm this by having a table-miss flow entry and checking matched packet counts. I guess more likely cause is radio interference. Somebody may have used a microwave oven or other WiFi communcitation. > Best Regards, > Soe Ye Htet > Future Internet and Wireless Research Group > Chulalongkorn University > > On Sun, Sep 16, 2018 at 8:15 PM Soe Ye Htet <soeyehtet1...@gmail.com> wrote: > > > Dear RYU Team, > > > > I am trying to test the TCP link throughput between RYU controller and OF > > Switch in my software defined wireless network. The implementation of > > control plane is in-band by sharing the control traffic and the data > > traffic in same physical wireless link. I plan to execute TCP throughput > > between RYU controller and one OF switch by executing iperf command. At the > > side of RYU controller, the command line of " iperf3 -s -d" is executed and > > the command line of " iperf3 -c <ip address of RYU> -t 10000 -i 10" at the > > OF Switch. Iperf3 was be operated up to 9600 seconds and then the TCP > > connection between RYU controller and OF Switch. I am trying to investigate > > what is real root cause of this problem. Can it be because of the failure > > of TCP handshake between RYU controller and the OF switch. > > > > Best Regards, > > Soe Ye Htet > > Future Internet and Wireless Research Group > > Chulalongkorn University, Thailand > > -- IWAMOTO Toshihiro _______________________________________________ Ryu-devel mailing list Ryu-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/ryu-devel
