iperf benchmark across a local network

iperf-local.txt

~ > iperf -c 192.168.1.138 -t60 -P32
------------------------------------------------------------
Client connecting to 192.168.1.138, TCP port 5001
TCP window size: 85.0 KByte (default)
------------------------------------------------------------
[ 24] local 192.168.1.175 port 40313 connected with 192.168.1.138 port 5001
[  5] local 192.168.1.175 port 40292 connected with 192.168.1.138 port 5001
[  4] local 192.168.1.175 port 40291 connected with 192.168.1.138 port 5001
[  3] local 192.168.1.175 port 40290 connected with 192.168.1.138 port 5001
[  7] local 192.168.1.175 port 40293 connected with 192.168.1.138 port 5001
[  8] local 192.168.1.175 port 40294 connected with 192.168.1.138 port 5001
[ 10] local 192.168.1.175 port 40297 connected with 192.168.1.138 port 5001
[ 13] local 192.168.1.175 port 40300 connected with 192.168.1.138 port 5001
[ 15] local 192.168.1.175 port 40302 connected with 192.168.1.138 port 5001
[ 14] local 192.168.1.175 port 40301 connected with 192.168.1.138 port 5001
[ 12] local 192.168.1.175 port 40299 connected with 192.168.1.138 port 5001
[  6] local 192.168.1.175 port 40295 connected with 192.168.1.138 port 5001
[  9] local 192.168.1.175 port 40296 connected with 192.168.1.138 port 5001
[ 11] local 192.168.1.175 port 40298 connected with 192.168.1.138 port 5001
[ 16] local 192.168.1.175 port 40303 connected with 192.168.1.138 port 5001
[ 18] local 192.168.1.175 port 40304 connected with 192.168.1.138 port 5001
[ 17] local 192.168.1.175 port 40305 connected with 192.168.1.138 port 5001
[ 20] local 192.168.1.175 port 40307 connected with 192.168.1.138 port 5001
[ 21] local 192.168.1.175 port 40308 connected with 192.168.1.138 port 5001
[ 23] local 192.168.1.175 port 40309 connected with 192.168.1.138 port 5001
[ 19] local 192.168.1.175 port 40306 connected with 192.168.1.138 port 5001
[ 30] local 192.168.1.175 port 40318 connected with 192.168.1.138 port 5001
[ 29] local 192.168.1.175 port 40317 connected with 192.168.1.138 port 5001
[ 32] local 192.168.1.175 port 40320 connected with 192.168.1.138 port 5001
[ 33] local 192.168.1.175 port 40321 connected with 192.168.1.138 port 5001
[ 31] local 192.168.1.175 port 40319 connected with 192.168.1.138 port 5001
[ 34] local 192.168.1.175 port 40322 connected with 192.168.1.138 port 5001
[ 25] local 192.168.1.175 port 40312 connected with 192.168.1.138 port 5001
[ 28] local 192.168.1.175 port 40316 connected with 192.168.1.138 port 5001
[ 22] local 192.168.1.175 port 40310 connected with 192.168.1.138 port 5001
[ 26] local 192.168.1.175 port 40314 connected with 192.168.1.138 port 5001
[ 27] local 192.168.1.175 port 40315 connected with 192.168.1.138 port 5001
[ ID] Interval       Transfer     Bandwidth
[  6]  0.0-63.1 sec  3.12 MBytes   415 Kbits/sec
[ 11]  0.0-63.2 sec  3.12 MBytes   415 Kbits/sec
[ 24]  0.0-63.4 sec  3.12 MBytes   414 Kbits/sec
[ 13]  0.0-63.5 sec  3.12 MBytes   413 Kbits/sec
[ 15]  0.0-63.5 sec  3.12 MBytes   413 Kbits/sec
[ 19]  0.0-63.6 sec  3.12 MBytes   412 Kbits/sec
[ 14]  0.0-63.6 sec  3.12 MBytes   412 Kbits/sec
[  7]  0.0-63.6 sec  3.12 MBytes   412 Kbits/sec
[ 20]  0.0-63.6 sec  3.12 MBytes   412 Kbits/sec
[  4]  0.0-63.7 sec  3.12 MBytes   412 Kbits/sec
[  3]  0.0-63.7 sec  3.12 MBytes   411 Kbits/sec
[ 23]  0.0-63.7 sec  3.12 MBytes   411 Kbits/sec
[ 12]  0.0-63.7 sec  3.12 MBytes   411 Kbits/sec
[ 16]  0.0-63.7 sec  3.12 MBytes   411 Kbits/sec
[ 30]  0.0-63.7 sec  3.12 MBytes   411 Kbits/sec
[ 29]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[ 32]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[ 31]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[ 18]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[ 21]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[ 17]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[ 34]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[  8]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[  9]  0.0-63.8 sec  3.12 MBytes   411 Kbits/sec
[ 33]  0.0-63.9 sec  3.12 MBytes   411 Kbits/sec
[ 10]  0.0-63.9 sec  3.12 MBytes   410 Kbits/sec
[ 27]  0.0-63.9 sec  3.12 MBytes   410 Kbits/sec
[ 25]  0.0-64.0 sec  3.12 MBytes   409 Kbits/sec
[ 26]  0.0-64.1 sec  3.12 MBytes   409 Kbits/sec
[ 28]  0.0-64.7 sec  3.25 MBytes   421 Kbits/sec
[  5]  0.0-64.8 sec  3.25 MBytes   421 Kbits/sec
[ 22]  0.0-64.8 sec  3.25 MBytes   420 Kbits/sec
[SUM]  0.0-64.8 sec   100 MBytes  13.0 Mbits/sec