Iperf installation and use

1 Installation and downloading

1、 open iperf Official website , Select the corresponding version to download .

 

2、 newly build iperf Folder , Unzip the downloaded installation package in the folder , obtain iperf Applications , The files extracted from different versions are different .

 

2 Usage method

1 Enter cmd, enter

 

Or copy the extracted file to C:\Windows\System32 Under the table of contents , Again from cmd The terminal enters D:\iperf-2.0.5-win32\iperf-2.0.5-win32 Under the table of contents

 

2、 Enter the terminal through one of the above methods

 

3、 Two computers , One as the client , One as the server .

The server inputs the command ：iperf.exe -s  -i 10 （ The number 10 Modifiable ）

 

The client enters the command ：iperf -c 192.168.10.173 -i 1 -t 10 -b 7M  （ The value can be modified ,IP It's the server computer IP） Print connection information and rate after input .

 

3 Detailed command

You can use iperf.exe  –help View help documents , Check those commands. The client and server can , Those servers / Client specific .

 

1 Commonly used instructions ：

-f [k|m|K|M] To express with Kbits, Mbits, KBytes, MBytes Show report , Default to Mbits In units of ,eg:iperf -c 222.35.11.23 -f K

-i sec Display report intervals in seconds ,eg:iperf -c 222.35.11.23 -i 2

-l Buffer size , The default is 8KB,eg:iperf -c 222.35.11.23 -l 16 -m Show tcp Maximum mtu value

-o Output reports and error messages to a file eg:iperf -c 222.35.11.23 -o c:\iperflog.txt

-p Specify the port used by the server or the port connected by the client eg:iperf -s -p 9999;iperf -c 222.35.11.23 -p 9999

-u Use udp agreement

-w Appoint TCP Window size , The default is 8KB

-B Bind a host address or interface （ This parameter is used when the host has more than one address or interface ）

-C Compatible with older versions （ When server End sum client Use when the end version is different ）

-M Set up TCP The largest packet mtu value

-N Set up TCP No delay

-V transmission ipv6 Data packets    server Special parameters

-D Run as a service ipserf,eg:iperf -s -D -R stop it iperf service , in the light of -D,eg:iperf -s -R 

-d At the same time, two-way transmission test

-n Specifies the number of bytes to be transferred ,eg:iperf -c 222.35.11.23 -n 100000

-r Two way transmission test alone

-t Test time , Default 10 second ,eg:iperf -c 222.35.11.23 -t 5

-F Specify the file to be transferred

-T Appoint ttl value

2 matters needing attention

1. Two computers should be in the same network segment , Connect directly with the network cable 、 Local area network or wide area network
2. Be careful “-u” Use of instructions .Iperf Both the server and the client are tested by default TCP Of , So the instructions either contain “-U” measuring UDP, Or it doesn't contain “-U” measuring TCP.
3. If the bandwidth of the test result is close to the instruction limit bandwidth , It means that the limited bandwidth value is set to be small .