| Here are results of my tests 
 
 COMPUTER <-> FIREFLY DIRECTLY CONNECTED 1000/FULL 
 Mac-Pro:~ pacopad$ iperf -c 192.168.1.151 -i2 -t120 ------------------------------------------------------------ Client connecting to 192.168.1.151, TCP port 5001 TCP window size:  129 KByte (default) ------------------------------------------------------------ [  4] local 192.168.1.1 port 50131 connected with 192.168.1.151 port 5001 [ ID] Interval       Transfer     Bandwidth [  4]  0.0- 2.0 sec   256 KBytes  1.05 Mbits/sec [  4]  2.0- 4.0 sec   256 KBytes  1.05 Mbits/sec [  4]  4.0- 6.0 sec   128 KBytes   524 Kbits/sec [  4]  6.0- 8.0 sec   128 KBytes   524 Kbits/sec [  4]  8.0-10.0 sec  0.00 Bytes  0.00 bits/sec [  4] 10.0-12.0 sec   128 KBytes   524 Kbits/sec [  4] 12.0-14.0 sec  0.00 Bytes  0.00 bits/sec ^C[  4] 14.0-16.0 sec   128 KBytes   524 Kbits/sec [  4] 16.0-18.0 sec  0.00 Bytes  0.00 bits/sec [  4] 18.0-20.0 sec  0.00 Bytes  0.00 bits/sec [  4] 20.0-22.0 sec  0.00 Bytes  0.00 bits/sec [  4]  0.0-23.7 sec  1.12 MBytes   399 Kbits/sec 
 COMPUTER <-> FIREFLY DIRECTLY CONNECTED 100/FULL FORCED ON FIREFLY Mac-Pro:~ pacopad$ iperf -c 192.168.1.151 -i2 -t120 ------------------------------------------------------------ Client connecting to 192.168.1.151, TCP port 5001 TCP window size:  129 KByte (default) ------------------------------------------------------------ [  4] local 192.168.1.1 port 50137 connected with 192.168.1.151 port 5001 [ ID] Interval       Transfer     Bandwidth [  4]  0.0- 2.0 sec  22.8 MBytes  95.4 Mbits/sec [  4]  2.0- 4.0 sec  22.6 MBytes  94.9 Mbits/sec [  4]  4.0- 6.0 sec  22.5 MBytes  94.4 Mbits/sec [  4]  6.0- 8.0 sec  22.4 MBytes  93.8 Mbits/sec [  4]  8.0-10.0 sec  22.4 MBytes  93.8 Mbits/sec [  4] 10.0-12.0 sec  22.4 MBytes  93.8 Mbits/sec [  4] 12.0-14.0 sec  22.6 MBytes  94.9 Mbits/sec [  4] 14.0-16.0 sec  22.1 MBytes  92.8 Mbits/sec [  4] 16.0-18.0 sec  22.5 MBytes  94.4 Mbits/sec ^C[  4]  0.0-19.4 sec   218 MBytes  94.3 Mbits/sec 
 
 COMPUTER <-> NAS SYNOLOGY THROUGH NETWORK Mac-Pro:~ pacopad$ iperf -c 192.168.1.2 -i2 -t120 ------------------------------------------------------------ Client connecting to 192.168.1.2, TCP port 5001 TCP window size:  129 KByte (default) ------------------------------------------------------------ [  4] local 192.168.1.1 port 50159 connected with 192.168.1.2 port 5001 [ ID] Interval       Transfer     Bandwidth [  4]  0.0- 2.0 sec   223 MBytes   935 Mbits/sec [  4]  2.0- 4.0 sec   223 MBytes   934 Mbits/sec [  4]  4.0- 6.0 sec   223 MBytes   935 Mbits/sec [  4]  6.0- 8.0 sec   223 MBytes   934 Mbits/sec [  4]  8.0-10.0 sec   223 MBytes   934 Mbits/sec [  4] 10.0-12.0 sec   223 MBytes   935 Mbits/sec [  4] 12.0-14.0 sec   223 MBytes   934 Mbits/sec [  4] 14.0-16.0 sec   223 MBytes   934 Mbits/sec [  4] 16.0-18.0 sec   223 MBytes   935 Mbits/sec ^C[  4]  0.0-18.7 sec  2.04 GBytes   935 Mbits/sec 
 It really think there is a problem and that's not located on my network  I 'll try to compile a 3.17 kernel to see if there are changes  
 Thx Pacopad |