Hi, I’m not sure exactly what you’re trying to do, but have you looked at ’tc’ as a means to simulate loss?
Tim > On 1 Aug 2020, at 00:29, Zufar Dhiyaulhaq <zufardhiyaul...@gmail.com> wrote: > > Hi Bob, > > Thanks for replying. In my understanding, when increasing the bitrate above > the bandwidth/throughput, it will increase the packet loss right? but in my > case, I increase to 9 Gbps and still not seeing any packet loss. Did > increasing window size will increasing packet loss? and why that can happen? > > I am trying to simulate packet loss. > > Thanks > > Best Regards, > Zufar Dhiyaulhaq > > > On Sat, Aug 1, 2020 at 5:28 AM Bob McMahon <bob.mcma...@broadcom.com> wrote: > Try to increase the window size with -w on the client. This will allow the > operating system to accept the write and drop packets within the stack. If > the window is too small the operating system will block the write until os > buffers are available. > > Bob > > On Fri, Jul 31, 2020 at 8:56 AM Zufar Dhiyaulhaq <zufardhiyaul...@gmail.com> > wrote: > Hi Folks, > > I have a problem with iperf3, I try to simulate packet loss with Iperf3 with > increasing the bitrate above the bandwidth. But packet loss output not > increasing. > > Ubuntu 18.04 > Iperf 3.7.3 > > I don't know why this is happening? Is there any bug with Iperf? this sounds > stupid for me. > > ubuntu@vm1:~$ iperf3 -c 192.168.0.92 --udp -t 20 --bitrate 9000m -R -V > iperf 3.7 > Linux vm1 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 > x86_64 > Control connection MSS 1390 > Setting UDP block size to 1390 > Time: Fri, 31 Jul 2020 15:53:39 GMT > Connecting to host 192.168.0.92, port 5201 > Reverse mode, remote host 192.168.0.92 is sending > Cookie: geu5ktrvwtalkelbszen5ym4rzxfp5xgzwdy > Target Bitrate: 9000000000 > [ 5] local 192.168.0.226 port 47999 connected to 192.168.0.92 port 5201 > Starting Test: protocol: UDP, 1 streams, 1390 byte blocks, omitting 0 > seconds, 20 second test, tos 0 > [ ID] Interval Transfer Bitrate Jitter Lost/Total > Datagrams > [ 5] 0.00-1.00 sec 13.8 MBytes 116 Mbits/sec 0.081 ms 269/10704 > (2.5%) > [ 5] 1.00-2.00 sec 13.7 MBytes 115 Mbits/sec 0.085 ms 0/10346 (0%) > [ 5] 2.00-3.00 sec 13.6 MBytes 114 Mbits/sec 0.035 ms 126/10365 > (1.2%) > [ 5] 3.00-4.00 sec 12.8 MBytes 107 Mbits/sec 0.033 ms 279/9946 > (2.8%) > [ 5] 4.00-5.00 sec 13.5 MBytes 113 Mbits/sec 0.051 ms 262/10427 > (2.5%) > [ 5] 5.00-6.00 sec 13.2 MBytes 111 Mbits/sec 0.058 ms 0/9965 (0%) > [ 5] 6.00-7.00 sec 13.3 MBytes 111 Mbits/sec 0.044 ms 32/10047 > (0.32%) > [ 5] 7.00-8.00 sec 13.0 MBytes 109 Mbits/sec 0.053 ms 43/9874 > (0.44%) > [ 5] 8.00-9.00 sec 13.0 MBytes 109 Mbits/sec 0.042 ms 34/9847 > (0.35%) > [ 5] 9.00-10.00 sec 13.6 MBytes 114 Mbits/sec 0.055 ms 78/10305 > (0.76%) > [ 5] 10.00-11.00 sec 13.5 MBytes 113 Mbits/sec 0.070 ms 0/10171 (0%) > [ 5] 11.00-12.00 sec 13.1 MBytes 110 Mbits/sec 0.047 ms 0/9851 (0%) > [ 5] 12.00-13.00 sec 13.3 MBytes 112 Mbits/sec 0.034 ms 0/10055 (0%) > [ 5] 13.00-14.00 sec 13.4 MBytes 112 Mbits/sec 0.040 ms 36/10136 > (0.36%) > [ 5] 14.00-15.00 sec 13.9 MBytes 117 Mbits/sec 0.055 ms 437/10921 > (4%) > [ 5] 15.00-16.00 sec 13.2 MBytes 111 Mbits/sec 0.043 ms 25/9964 > (0.25%) > [ 5] 16.00-17.00 sec 13.2 MBytes 110 Mbits/sec 0.043 ms 21/9942 > (0.21%) > [ 5] 17.00-18.00 sec 12.9 MBytes 108 Mbits/sec 0.046 ms 0/9702 (0%) > [ 5] 18.00-19.00 sec 13.4 MBytes 112 Mbits/sec 0.050 ms 208/10294 > (2%) > [ 5] 19.00-20.00 sec 13.5 MBytes 113 Mbits/sec 0.048 ms 0/10152 (0%) > - - - - - - - - - - - - - - - - - - - - - - - - - > Test Complete. Summary Results: > [ ID] Interval Transfer Bitrate Jitter Lost/Total > Datagrams > [ 5] 0.00-20.04 sec 269 MBytes 113 Mbits/sec 0.000 ms 0/203058 (0%) > sender > [ 5] 0.00-20.00 sec 267 MBytes 112 Mbits/sec 0.048 ms 1850/203014 > (0.91%) receiver > > Thank you > > Best Regards, > Zufar Dhiyaulhaq > _______________________________________________ > Iperf-users mailing list > Iperf-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iperf-users > _______________________________________________ > Iperf-users mailing list > Iperf-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/iperf-users _______________________________________________ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
