参考资料：
https://blogs.oracle.com/mandalika/entry/measuring_network_bandwidth_using_iperf

背景介绍：
在调试网络时，经常需要检测两台主机间的最大带宽，我一直使用iperf命令，效果很好很准确，但发现有一些运维朋友并不知道有这个工具，于是打算写篇文章简单介绍一下。

具体操作：
操作系统：CentOS6.5 x86_64 Minimal
服务器：
192.168.10.11
192.168.10.12

[root@192.168.10.11 ~]# yum install http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
[root@192.168.10.11 ~]# yum install iperf

[root@192.168.10.12 ~]# yum install http://dl.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
[root@192.168.10.12 ~]# yum install iperf

[root@192.168.10.12 ~]# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)

[root@192.168.10.11 ~]# iperf -c 192.168.10.12
------------------------------------------------------------
Client connecting to 192.168.10.12, TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.10.11 port 23351 connected with 192.168.10.12 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-10.0 sec 744 MBytes 624 Mbits/sec

[root@192.168.10.12 ~]# iperf -s
------------------------------------------------------------
Server listening on TCP port 5001
TCP window size: 85.3 KByte (default)
------------------------------------------------------------
[ 4] local 192.168.10.12 port 5001 connected with 192.168.10.11 port 23351
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-10.0 sec 744 MBytes 623 Mbits/sec