Dear all, i am a newbie to iperf but I see a very wide bandwidth spreading to one of our linux clients. Tested it also against some other linux and windows server the bandwidth is more common.
iperf 3.7 (cJSON 1.5.2) CYGWIN_NT-10.0-14393 citpc001 3.0.7-338.x86_64 2019-04-30 18:08 UTC x86_64 Done the tests one after another and there are such different values I could not believe the results. Windows as server and Linux & Windows as server (on linux ver 3.6 was used) but this not an answer because the other linux server was more constant.. Any idea on that? If Replaced hostnames and IP with A & B. Log: warning: Ignoring nonsense TCP MSS 0 Connecting to host A, port 5201 [ 5] local IP B port 55218 connected to IP A port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 22.0 MBytes 184 Mbits/sec [ 5] 1.00-2.00 sec 11.4 MBytes 95.5 Mbits/sec [ 5] 2.00-3.00 sec 21.2 MBytes 178 Mbits/sec [ 5] 3.00-4.00 sec 21.1 MBytes 177 Mbits/sec [ 5] 4.00-5.00 sec 12.4 MBytes 104 Mbits/sec [ 5] 5.00-6.00 sec 10.2 MBytes 86.0 Mbits/sec [ 5] 6.00-7.00 sec 10.9 MBytes 91.2 Mbits/sec [ 5] 7.00-8.00 sec 11.1 MBytes 93.3 Mbits/sec [ 5] 8.00-9.00 sec 18.6 MBytes 156 Mbits/sec [ 5] 9.00-10.00 sec 8.00 MBytes 67.1 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.00 sec 147 MBytes 123 Mbits/sec sender [ 5] 0.00-10.05 sec 147 MBytes 123 Mbits/sec receiver iperf Done. ------------------ warning: Ignoring nonsense TCP MSS 0 Connecting to host A, port 5201 [ 5] local IP B port 55225 connected to IP A port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 114 MBytes 957 Mbits/sec [ 5] 1.00-2.00 sec 112 MBytes 942 Mbits/sec [ 5] 2.00-3.00 sec 112 MBytes 942 Mbits/sec [ 5] 3.00-4.00 sec 112 MBytes 941 Mbits/sec [ 5] 4.00-5.00 sec 112 MBytes 943 Mbits/sec [ 5] 5.00-6.00 sec 112 MBytes 942 Mbits/sec [ 5] 6.00-7.00 sec 112 MBytes 942 Mbits/sec [ 5] 7.00-8.00 sec 112 MBytes 942 Mbits/sec [ 5] 8.00-9.00 sec 112 MBytes 942 Mbits/sec [ 5] 9.00-10.00 sec 112 MBytes 943 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.00 sec 1.10 GBytes 944 Mbits/sec sender [ 5] 0.00-10.06 sec 1.10 GBytes 938 Mbits/sec receiver iperf Done. ------- warning: Ignoring nonsense TCP MSS 0 Connecting to host A, port 5201 [ 5] local IP B port 55227 connected to IP A port 5201 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 2.75 MBytes 23.1 Mbits/sec [ 5] 1.00-2.00 sec 2.88 MBytes 24.1 Mbits/sec [ 5] 2.00-3.00 sec 17.4 MBytes 146 Mbits/sec [ 5] 3.00-4.00 sec 10.6 MBytes 89.2 Mbits/sec [ 5] 4.00-5.00 sec 24.5 MBytes 206 Mbits/sec [ 5] 5.00-6.00 sec 18.9 MBytes 158 Mbits/sec [ 5] 6.00-7.00 sec 12.6 MBytes 106 Mbits/sec [ 5] 7.00-8.00 sec 9.75 MBytes 81.8 Mbits/sec [ 5] 8.00-9.00 sec 18.1 MBytes 152 Mbits/sec [ 5] 9.00-10.00 sec 18.1 MBytes 152 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.00 sec 136 MBytes 114 Mbits/sec sender [ 5] 0.00-10.05 sec 135 MBytes 113 Mbits/sec receiver iperf Done. Regards Sascha _______________________________________________ Iperf-users mailing list Iperf-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/iperf-users
