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<p>Hello Wittawat,<br>
<br>
You could try sysctl -w to set up big buffer for both send and recv, for example:<br>
<br>
net.ipv4.tcp_rmem = "4096 87380 4149248"<br>
net.ipv4.tcp_wmem = "4096 87380 4149248"<br>
<br>
And please try multiple streams test instead of 1, like iperf you might see 1.2GB/s or above.<br>
<br>
Good luck!<br>
Shirley</body></html>