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Network performance testing in Linux

IPERF is a network speed testing tool. It is reliable if you have two servers, and you want to measure network speed between them.

It can be installed using yum
# yum install iperf

For testing, one iperf instance runs as a server on one server and another iperf instance runs as a client on the other server.

For running iperf as a server
# iperf -s
Server listening on TCP port 5001

And for running iperf as a client
# iperf -c 192.168.0.11
Client connecting to 192.168.0.11, TCP port 5001 TCP window size: 16.0 KByte (default) 
------------------------------------------------------------ 
[3] local 192.168.0.12 port 47326 connected with 192.168.0.11 port 5001 
[ID] Interval Transfer Bandwidth 
[3] 0.0-10.0 sec 267 MBytes 228 Mbits/sec

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