测试局域网两台机器的之间的最大带宽

工具下载：https://iperf.fr/iperf-download.php

测试环境：

服务端（CentOS7）：

1、快速安装

wget -O /usr/lib/libiperf.so.0 https://iperf.fr/download/ubuntu/libiperf.so.0_3.1.3
wget -O /usr/bin/iperf3 https://iperf.fr/download/ubuntu/iperf3_3.1.3
chmod +x /usr/bin/iperf3

2、排错

注：在CentOS 7下安装iperf3时可能会出现如下错误

iperf3: error while loading shared libraries: libiperf.so.0: cannot open shared object file: No such file or directory

一般情况下是因为wget了iperf3的动态链接库，而共享库未能及时更新，需要手动执行 ldconfig 命令以创建连接和缓存文件。

3、安装测试

iperf3 -v 查看版本

带宽测试：

1、服务器端开始监听：

[root@test]# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

2、客户端连接测试

本地客户端日志：

D:\iperf-3.1.3-win64>iperf3.exe -c 192.168.99.240
Connecting to host 192.168.99.240, port 5201
[  4] local 192.168.167.28 port 58926 connected to 192.168.99.240 port 5201
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-1.00   sec  13.6 MBytes   114 Mbits/sec
[  4]   1.00-2.00   sec  8.25 MBytes  69.2 Mbits/sec
[  4]   2.00-3.00   sec  7.62 MBytes  64.0 Mbits/sec
[  4]   3.00-4.00   sec  10.4 MBytes  87.0 Mbits/sec
[  4]   4.00-5.00   sec  8.75 MBytes  73.4 Mbits/sec
[  4]   5.00-6.00   sec  10.8 MBytes  90.2 Mbits/sec
[  4]   6.00-7.00   sec  8.25 MBytes  69.2 Mbits/sec
[  4]   7.00-8.00   sec  7.75 MBytes  65.0 Mbits/sec
[  4]   8.00-9.00   sec  11.0 MBytes  92.3 Mbits/sec
[  4]   9.00-10.00  sec  10.4 MBytes  87.0 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  4]   0.00-10.00  sec  96.8 MBytes  81.2 Mbits/sec                  sender
[  4]   0.00-10.00  sec  96.6 MBytes  81.1 Mbits/sec                  receiver

iperf Done.

远程服务器端日志

[root@ATopencanaryAQ01 admin]# iperf3 -s
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------


Accepted connection from 192.168.167.28, port 58925
[  5] local 192.168.99.240 port 5201 connected to 192.168.167.28 port 58926
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-1.00   sec  11.9 MBytes   100 Mbits/sec                  
[  5]   1.00-2.00   sec  8.01 MBytes  67.2 Mbits/sec                  
[  5]   2.00-3.00   sec  7.12 MBytes  59.7 Mbits/sec                  
[  5]   3.00-4.00   sec  10.8 MBytes  90.8 Mbits/sec                  
[  5]   4.00-5.00   sec  9.03 MBytes  75.7 Mbits/sec                  
[  5]   5.00-6.00   sec  10.8 MBytes  90.9 Mbits/sec                  
[  5]   6.00-7.00   sec  8.56 MBytes  71.8 Mbits/sec                  
[  5]   7.00-8.00   sec  8.52 MBytes  71.5 Mbits/sec                  
[  5]   8.00-9.00   sec  11.6 MBytes  97.3 Mbits/sec                  
[  5]   9.00-9.95   sec  10.2 MBytes  90.5 Mbits/sec                  
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bandwidth
[  5]   0.00-9.95   sec  0.00 Bytes  0.00 bits/sec                  sender
[  5]   0.00-9.95   sec  96.6 MBytes  81.5 Mbits/sec                  receiver
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------

简单来说，可以认为局域网两台机器之间的带宽是 81.5 Mbits/sec。