Crossover Cable, MTU 1500 Rackstation Server Sun Client C:\Program Files (x86)\iPerf>iperf -c 10.10.1.109 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.109, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [788] local 10.10.1.120 port 1187 connected with 10.10.1.109 port 4000 [ ID] Interval Transfer Bandwidth [788] 0.0-10.0 sec 387 MBytes 324 Mbits/sec Sun Server Rackstation Client RackStation> iperf -c 10.10.1.120 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.120, TCP port 4000 TCP window size: 31.2 KByte (default) ------------------------------------------------------------ [ 5] local 10.10.1.109 port 4963 connected with 10.10.1.120 port 4000 [ 5] 0.0-10.0 sec 350 MBytes 294 Mbits/sec Crossover Cable, MTU 9000 Sun Server Rackstation Client RackStation> iperf -c 10.10.1.120 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.120, TCP port 4000 TCP window size: 72.5 KByte (default) ------------------------------------------------------------ [ 5] local 10.10.1.109 port 3353 connected with 10.10.1.120 port 4000 [ 5] 0.0-10.0 sec 610 MBytes 512 Mbits/sec Rackstation Server Sun Client Note that CP window size on client is still shown as 8kB, overriding the value reduces the performance as shown. RackStation> iperf -s -p 4000 ------------------------------------------------------------ Server listening on TCP port 4000 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 6] local 10.10.1.109 port 4000 connected with 10.10.1.120 port 1257 [ 6] 0.0-10.1 sec 864 KBytes 703 Kbits/sec [ 6] local 10.10.1.109 port 4000 connected with 10.10.1.120 port 1260 [ 6] 0.0-10.0 sec 616 MBytes 516 Mbits/sec [ 6] local 10.10.1.109 port 4000 connected with 10.10.1.120 port 1261 [ 6] 0.0-10.1 sec 816 KBytes 663 Kbits/sec C:\Program Files (x86)\iPerf>iperf -c 10.10.1.109 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.109, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [788] local 10.10.1.120 port 1257 connected with 10.10.1.109 port 4000 [ ID] Interval Transfer Bandwidth [788] 0.0-10.1 sec 864 KBytes 703 Kbits/sec C:\Program Files (x86)\iPerf>iperf -c 10.10.1.109 -p 4000 -w 80k ------------------------------------------------------------ Client connecting to 10.10.1.109, TCP port 4000 TCP window size: 80.0 KByte ------------------------------------------------------------ [788] local 10.10.1.120 port 1260 connected with 10.10.1.109 port 4000 [ ID] Interval Transfer Bandwidth [788] 0.0-10.0 sec 616 MBytes 517 Mbits/sec C:\Program Files (x86)\iPerf>iperf -c 10.10.1.109 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.109, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [788] local 10.10.1.120 port 1261 connected with 10.10.1.109 port 4000 [ ID] Interval Transfer Bandwidth [788] 0.0-10.1 sec 816 KBytes 663 Kbits/sec Crossover Cable, MTU 9000 Thinkpad T60p Server (driver does not support custom MTU sizes) Sun Client C:\Program Files (x86)\iPerf>iperf -c 10.10.1.107 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.107, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [788] local 10.10.1.120 port 1266 connected with 10.10.1.107 port 4000 [ ID] Interval Transfer Bandwidth [788] 0.0-10.0 sec 463 MBytes 388 Mbits/sec Sun Server Thinkpad T60p Client (driver does not support custom MTU sizes) D:\Program Files\iperf-2.0.2\bin>iperf -c 10.10.1.120 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.120, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [ 3] local 10.10.1.107 port 1901 connected with 10.10.1.120 port 4000 [ Crossover Cable, MTU 1500 Thinkpad T60p Server (driver does not support custom MTU sizes) Sun Client C:\Program Files (x86)\iPerf>iperf -c 10.10.1.107 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.107, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [788] local 10.10.1.120 port 1277 connected with 10.10.1.107 port 4000 [ ID] Interval Transfer Bandwidth [788] 0.0-10.0 sec 447 MBytes 375 Mbits/sec Sun Server Thinkpad T60p Client (driver does not support custom MTU sizes) D:\Program Files\iperf-2.0.2\bin>iperf -c 10.10.1.120 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.120, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [ 3] local 10.10.1.107 port 1946 connected with 10.10.1.120 port 4000 [ 3] 0.0-10.0 sec 197 MBytes 165 Mbits/sec HP ProCurve 1400-24G Switch, MTU 9000 Rackstation Server Sun Client C:\Program Files (x86)\iPerf>iperf -c 10.10.1.109 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.109, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [788] local 10.10.1.120 port 1283 connected with 10.10.1.109 port 4000 [ ID] Interval Transfer Bandwidth [788] 0.0-10.1 sec 800 KBytes 650 Kbits/sec Sun Server Rackstation Client RackStation> iperf -c 10.10.1.120 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.120, TCP port 4000 TCP window size: 72.5 KByte (default) ------------------------------------------------------------ [ 5] local 10.10.1.109 port 4036 connected with 10.10.1.120 port 4000 [ 5] 0.0-10.0 sec 607 MBytes 510 Mbits/sec HP ProCurve 1400-24G Switch, MTU 1500 Rackstation Server Sun Client C:\Program Files (x86)\iPerf>iperf -c 10.10.1.109 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.109, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [788] local 10.10.1.120 port 1296 connected with 10.10.1.109 port 4000 [ ID] Interval Transfer Bandwidth [788] 0.0-10.0 sec 363 MBytes 304 Mbits/sec Rackstation Client Sun Server RackStation> iperf -c 10.10.1.120 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.120, TCP port 4000 TCP window size: 27.8 KByte (default) ------------------------------------------------------------ [ 5] local 10.10.1.109 port 4070 connected with 10.10.1.120 port 4000 [ 5] 0.0-10.0 sec 344 MBytes 289 Mbits/sec HP ProCurve 1400-24G Switch, MTU 1500 Asus Client Rackstation Server C:\Program Files\iperf>iperf -c 10.10.1.109 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.109, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [1912] local 10.10.1.172 port 2125 connected with 10.10.1.109 port 4000 [ ID] Interval Transfer Bandwidth [1912] 0.0-10.0 sec 367 MBytes 307 Mbits/sec Asus Server Rackstation Client RackStation> iperf -c 10.10.1.172 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.172, TCP port 4000 TCP window size: 16.0 KByte (default) ------------------------------------------------------------ [ 5] local 10.10.1.109 port 1702 connected with 10.10.1.172 port 4000 [ 5] 0.0-10.0 sec 303 MBytes 254 Mbits/sec HP ProCurve 1400-24G Switch, MTU 9000 Asus Client Rackstation Server C:\Program Files\iperf>iperf -c 10.10.1.109 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.109, TCP port 4000 TCP window size: 8.00 KByte (default) ------------------------------------------------------------ [1912] local 10.10.1.172 port 2168 connected with 10.10.1.109 port 4000 [ ID] Interval Transfer Bandwidth [1912] 0.0-10.1 sec 728 KBytes 592 Kbits/sec Asus Server Rackstation Client RackStation> iperf -c 10.10.1.172 -p 4000 ------------------------------------------------------------ Client connecting to 10.10.1.172, TCP port 4000 TCP window size: 27.2 KByte (default) ------------------------------------------------------------ [ 5] local 10.10.1.109 port 2105 connected with 10.10.1.172 port 4000 [ 5] 0.0-10.0 sec 632 MBytes 530 Mbits/sec