iperf/iperf3网络测试工具的安装与使用

1.官网及下载路径：

iperf3 homepage at: http://software.es.net/iperf/
Report bugs to: https://github.com/esnet/iperf

2.iperf3命令选项

[ubuntu @meta]$ iperf3

iperf3: parameter error - must either be a client (-c) or server (-s)

Usage: iperf [-s|-c host] [options]

       iperf [-h|--help] [-v|--version]

Server or Client:

  -p, --port      #         server port to listen on/connect to

  -f, --format    [kmgKMG]  format to report: Kbits, Mbits, KBytes, MBytes

  -i, --interval  #         seconds between periodic bandwidth reports

  -F, --file name           xmit/recv the specified file

  -A, --affinity n/n,m      set CPU affinity

  -B, --bind      <host>    bind to a specific interface

  -V, --verbose             more detailed output

  -J, --json                output in JSON format

  -d, --debug               emit debugging output

  -v, --version             show version information and quit

  -h, --help                show this message and quit

Server specific:

  -s, --server              run in server mode

  -D, --daemon              run the server as a daemon

Client specific:

  -c, --client    <host>    run in client mode, connecting to <host>

  -u, --udp                 use UDP rather than TCP

  -b, --bandwidth #[KMG][/#] target bandwidth in bits/sec ( for unlimited)

                            (default  Mbit/sec for UDP, unlimited for TCP)

                            (optional slash and packet count for burst mode)

  -t, --time      #         time in seconds to transmit for (default  secs)

  -n, --bytes     #[KMG]    number of bytes to transmit (instead of -t)

  -k, --blockcount #[KMG]   number of blocks (packets) to transmit (instead of -t or -n)

  -l, --len       #[KMG]    length of buffer to read or write

                            (default  KB for TCP,  KB for UDP)

  -P, --parallel  #         number of parallel client streams to run

  -R, --reverse             run in reverse mode (server sends, client receives)

  -w, --window    #[KMG]    TCP window size (socket buffer size)

  -C, --linux-congestion <algo>  set TCP congestion control algorithm (Linux only)

  -M, --set-mss   #         set TCP maximum segment size (MTU -  bytes)

  -N, --nodelay             set TCP no delay, disabling Nagle's Algorithm

  -, --version4            only use IPv4

  -, --version6            only use IPv6

  -S, --tos N               set the IP 'type of service'

  -L, --flowlabel N         set the IPv6 flow label (only supported on Linux)

  -Z, --zerocopy            use a 'zero copy' method of sending data

  -O, --omit N              omit the first n seconds

  -T, --title str           prefix every output line with this string

  --get-server-output       get results from server

[KMG] indicates options that support a K/M/G suffix for kilo-, mega-, or giga-

iperf3 homepage at: http://software.es.net/iperf/

Report bugs to:     https://github.com/esnet/iperf

3.iperf3的测试例子

测试1：

一台电脑本地回环测试

打开两个终端t1和t2，在t1中输入命令:iperf3 -s 在t2中输入命令: iperf3 -c 127.0.0.1 -t

本例中t2向t1发送5秒中的数据包

测试2：

一台电脑的实际网卡：

打开两个终端t1和t2，在t1中输入命令:iperf3 -s 在t2中输入命令: iperf3 -c 10.219.119.21

测试3：

两台电脑之间发包测试,在电脑A中打开终端t1，在电脑B中打开终端t2，确保两台电脑在同一个局域网中并假设t1的IP地址为192.168.1.，t2的IP地址为192.168.1.

在t1中输入命令: iperf3 -s 在t2中输入命令: iperf3 -c 192.168.1.123 -t

如果出现错误iperf3: error - unable to connect to server: No route to host，请修改电脑A的防火墙规则。

防火墙规则修改方法：

防火墙会阻止两台电脑之间的通信。centos7.0自带的防火墙为firewalld，可以先把firewalld删除，再安装iptalbes。

在t1中输入以下两条的命令来停用firewalld:

.删除firewalld的命令如下

sudo systemctl stop firewalld //关闭

sudo systemctl disable firewalld //禁止开机启动

.安装iptables的命令如下

sudo yum install -y iptables-services.x86_64 iptables-devel.x86_64

重新测试iperf3，在t1中输入命令:

sudo iptables -I INPUT  -s 192.168.1.124 -j ACCEPT

sudo service iptables save

iperf3 -s

在t2中输入命令:

iperf3 -c 192.168.1.123 -t 

. Apple手机测试

开发板host，ip:172.27.0.25,App手机做client:

测试UDP：

开发板：# iperf -V -s -u

手机：iperf -p  -l  -w  -i 1.0 -u -c 172.27.0.25 -t 10.0 -b 100m

测试TCP：

开发板：# iperf -V -s

手机：iperf -p  -l  -w  -i 1.0 -c 172.27.0.25 -t 10.0

开发板client,App手机做service,ip:172.27.0.165

测试TCP：

开发板：# iperf -c 172.27.0.165 -w 128k -t 10.0 -i 1.0 -p

手机：# iperf -p  -l  -w  -i 1.0 -s

测试UDP：

开发板：# iperf -c 172.27.0.165 -w 128k -t 10.0 -i 1.0 -p  -l  -u -b 50m

手机：# iperf -p  -l  -w  -i 1.0 -u -s

4.iperf3卸载
查看所有已经安装的软件：
sudo yum list installed
删除iperf3：
sudo yum -y remove iperf3.x86_64

5.软件包中的test_command.sh

#!/bin/sh

#

# This is a set of commands to run and verify they work before doing a new release.

# Eventually they should also use the -J flag to generate JSON output, and a program should

# be written to check the output.

# Be sure to test both client and server on Linux, BSD, and OSX

#

if [ $# -ne  ]

then

  echo "Usage: `basename $0` hostname"

  exit $E_BADARGS

fi

set -x

host=$

# basic testing

./src/iperf3 -c $host -V -t  -T "test1"

./src/iperf3 -c $host -u -V -t

# omit mode

./src/iperf3 -c $host -i . -O  -t

# JSON mode

./src/iperf3 -c $host -i  -J -t

# force V4

./src/iperf3 -c $host - -t

./src/iperf3 -c $host - -u -t

# force V6

./src/iperf3 -c $host - -t

./src/iperf3 -c $host - -u -t

# parallel streams

./src/iperf3 -c $host -P  -t

./src/iperf3 -c $host -u -P  -t

# reverse mode

./src/iperf3 -c $host -P  -t  -R

./src/iperf3 -c $host -u -P  -t  -R

# zero copy

./src/iperf3 -c $host -Z -t

./src/iperf3 -c $host -Z -t  -R

# window size

./src/iperf3 -c $host -t  -w 8M

# -n flag

./src/iperf3 -c $host -n 5M

./src/iperf3 -c $host -n 5M -u -b1G

# conflicting -n -t flags

./src/iperf3 -c $host -n 5M -t

# -k mode

./src/iperf3 -c $host -k 1K

./src/iperf3 -c $host -k 1K -u -b1G

# CPU affinity

./src/iperf3 -c $host -A /

./src/iperf3 -c $host -A / -u -b1G

# Burst mode

./src/iperf3 -c $host -u -b1G/

# change MSS

./src/iperf3 -c $host -M  -V

# test congestion control option (linux only)

./src/iperf3 -c $host -C reno -V

6. 若网络媒体出现卡顿可以是用iperf测试卡顿时网络的带宽，以定位是否是底层问题。