@KatolaZ and @remi Thank you for your inputs on iperf2 vs. iperf3.
After all the tests I needed a clean setup again and reinstalled both OpenBSD and Window 10. With the new notebook (Dell vs Lenovo) I have different results. Dell: ~ 200Mbit/s Lenovo: ~ 145Mbit/s iperf2 vs. iperf3 (I also ran the corresponding version on Windows): apu# iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.20.28 port 5001 connected with 192.168.20.40 port 50052 [ ID] Interval Transfer Bandwidth [ 4] 0.0-10.0 sec 241 MBytes 202 Mbits/sec apu# iperf3 -s ----------------------------------------------------------- Server listening on 5201 ----------------------------------------------------------- Accepted connection from 192.168.20.40, port 50054 [ 5] local 192.168.20.28 port 5201 connected to 192.168.20.40 port 50055 [ ID] Interval Transfer Bitrate [ 5] 0.00-1.00 sec 22.2 MBytes 186 Mbits/sec [ 5] 1.00-2.00 sec 23.5 MBytes 197 Mbits/sec [ 5] 2.00-3.00 sec 23.4 MBytes 196 Mbits/sec [ 5] 3.00-4.00 sec 23.3 MBytes 196 Mbits/sec [ 5] 4.00-5.00 sec 23.2 MBytes 195 Mbits/sec [ 5] 5.00-6.00 sec 23.4 MBytes 196 Mbits/sec [ 5] 6.00-7.00 sec 23.4 MBytes 196 Mbits/sec [ 5] 7.00-8.00 sec 23.4 MBytes 197 Mbits/sec [ 5] 8.00-9.00 sec 23.0 MBytes 193 Mbits/sec [ 5] 9.00-10.00 sec 23.5 MBytes 197 Mbits/sec [ 5] 10.00-10.05 sec 1.05 MBytes 197 Mbits/sec - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bitrate [ 5] 0.00-10.05 sec 233 MBytes 195 Mbits/sec receiver On 1/30/2020 6:37 PM, Remi Locherer wrote: > > iperf vs. iperf3?