You could tell whether it was just a delay by polling again a few seconds after the transfer is complete.
On Wed, Jun 25, 2014 at 05:02:20PM -0300, Pedro Henrique wrote: > Yes, they pass through the same switches. This is a sample of a polling and > as you can see the traffic is different from each other. The switch S1 > should have the amount of traffic passed through it equal or bigger than > S2, S3 , S4 or S5, since it is the first switch. Maybe the problem is due > to the delay of sending a statistic request and wait for a statistic reply > since the ovs switches are update once a second, if I'm right. > The traffic below is in Mbps and the delay of each link is 25ms. This is > the total traffic passed through a switch on a specific flow and collected > on a specific time (each second). > Time S1 S2 S3 S4 S5 > > 10:57:2:537;640.98;945.17;1010.35;32.59;32.59 > 10:57:3:672;1694.78;2009.84;2053.3;2096.75;2151.07 > 10:57:4:805;2183.66;2498.72;2520.45;2553.04;2574.77 > 10:57:5:932;2585.63;2889.82;2922.42;2955.01;2998.46 > 10:57:7:61;2900.69;3215.74;3226.61;3248.34;3270.06 > 10:57:8:198;3378.7;3693.76;3758.94;3845.86;3932.77 > 10:57:9:327;4465.1;4769.3;4834.48;4910.53;5008.3 > > > > 2014-06-25 13:22 GMT-03:00 Ben Pfaff <b...@nicira.com>: > > > On Wed, Jun 25, 2014 at 01:12:33PM -0300, Pedro Henrique wrote: > > > I'm using an openflow controller to poll the ovs each second, from this > > I'm > > > getting the flows passing through the switch ans other relevant > > information. > > > > > > I made a topology similiar to this. > > > > > > Host1 --- OVS1 ---- OVS2 ---- OVS3 ---- OVS4 --- OVS5 --- Host2 > > > > > > I'm generating traffic from Host1 to Host 2 using iperf and all hosts and > > > switches are generated by Mininet. > > > > > > I'm polling all the switches on the same time and I noticed that OVS1 > > > doesn't have more traffic passing through it than the OVS5 or any other > > > switches. This seems strange, since I'm polling the switch from the > > > beginning of the flow, so the traffic from OVS1 should be bigger than > > OVS2 > > > and OVS2 traffic > OVS3 traffic > OVS4 traffic > OVS5 traffic. But this > > > doesn't happen. > > > > I don't understand why there should be more traffic on OVS1 than other > > switches. All of the traffic from Host1 to Host2 passes through all > > of the switches, right? So I'd expect each switch to report the same > > amount of traffic. > > _______________________________________________ discuss mailing list discuss@openvswitch.org http://openvswitch.org/mailman/listinfo/discuss
