May 31, 2020 in this article, i will take you through 15 useful examples of iperf commands in linux. How to perform network throughput tests with iperf techrepublic. Of course, it is also possible to use two linux boxes. Normally in the test environment, iperf client sends data to the server for the test. If the file is on your desktop, then you would use the following in the command prompt. By default, the iperf client connects to the iperf server on the tcp port 5001 and the bandwidth displayed by iperf is the bandwidth from the client to the server. You will need to download iperf software and load it on both machines. It is a crossplatform tool that can produce standardized performance measurements for any network.
This form of testing can help identify poor performance or disqualify the ethernet or switch port as the issue. One side runs in a server mode, listening for requests. Linux is used as the iperf client and windows as the iperf server. It is a fairly straightforward process, and on the next page well talk about an easier way to use iperf services, using a. In order to acquire maximum or rather improved network performance, you need to increase the throughput as well as the latency of your networks receiving and sending. Iperf is included with most linux distributions but you can compile iperf for windows if needed. How to install and use iperf for throughput test on windows.
Jul 08, 2019 how to install iperf on mac, centos, and ios. Iperf can be used in windows, linux, and mac etc operation system. It provides a reliable information about network bandwidth and its performance. Download iperf for windows 10 for windows to iperf for windows phone.
Open a command prompt and navigate to the folder containing the iperf. An example of a set of unix linux commands to generate correct keypair follows. Even though some of the tools presented in our tutorials can be used on microsoft windows, they run better on linux. One way to use the iperf tool is testing between an iperf server and an iperf client on the same wired segment. A tool that measures network performance of tcpudp including latency. In this guide, we are using iperf3 on windows 64 bit, but the tutorial on how to use iperf is the same for any os. A network traffic tool for measuring tcp and udp performance with metrics around both throughput and latency.
You do not need to install the tool, it is enough to download the iperf archive and extract it to a local directory on the drive. Typical iperf output contains a timestamped report of the amount of data transferred. Note that this option is also available for udp connection. Chapter 1 installation to be able to utilise the python wrapper around iperf3 you. Using iperf to troubleshoot speed and throughput issues ibm. This tutorial will perform a wired throughput test and a wireless throughput test between an. To determine the network bandwidth available between two systems, you can run iperf in server mode on one of the systems and in client mode on the other. You can run either a linux, windows or a mac os operating system. Handy iperf commands for quick network testing techrepublic.
May 30, 2011 iperf is very powerful and can easily generate enough traffic to saturate a 1gb, or 10gb connection. On both the client and server you can set the local affinity by using the n form of this argument where n. Dec 25, 2020 how to download and install iperf for windows 10 pclaptop. The goals include maintaining an active iperf code base across a broad set of platforms and operating systems. You can easily check the network latency and other errors using this tool. Sep 11, 2018 iperf is a simple, open source, commandline, network diagnostic tool that you install on two endpoints which can run on linux, bsd, or windows platforms. Use make to configure for your os and compile the source code. Now lets just move to the next section to share the steps you have to follow to download iperf for windows pc. You can run the iperf server with a large tcp window size and on a different tcp port. How to test network throughput using iperf3 tool in linux. Note that iperf3 is not backwards compatible with iperf2.
Iperf is an open source networking tool used to measure throughput or performance of a network. Iperf compiles cleanly on many systems including linux, sgi irix, hpux, solaris, aix, and cray unicos. We will actually be using iperf3 for this tutorial. Before going ahead with the test, lets understand some networking concepts related to. Iperf is a tool for network performance measurement and tuning. Dec 23, 2019 with iperf, you can tune several parameters associated with timing, buffers, and protocols such as tcp, udp, sctp. Sep 30, 2020 download iperf the ultimate speed test tool for tcp, udp and sctp. In the command prompt on the server side, run this command. Iperf 2 iperf 2 is widely used current version is 2. The server runs on the remote host and listens for connections from the client.
The process is fairly thesame for other versions of windows. Openwrt aptget install iperf yum install iperf emerge iperf. Realtime speed, performance and bandwidth measurements iperf is a command line tool for performing realtime network throughput measurements. Feb 12, 2016 there is also a list of available iperf servers that are over the internet if you wanted to test internet speed and that information is also where you would download the latest version of iperf at. Iperfjperf howto guide to use jperf, you must have java and iperf installed. The free network tool iperf is among the more easytouse on the internet today. Jun 28, 2016 using iperf on a microsoft windows system.
Iperf is a free opensource software tool that provides a capability to measure the throughput between two hosts using both transmission control protocol tcp and user datagram protocol udp data streams. Test network bandwidth with iperf on windows 10 tutorial. Dont be scared if you only know the windows os and dont want to spend hours configuring the tools on linux. Say i want to test the available bandwidth between a server windows server 2008 and a client. There are different versions of iperf, we will only focus on iperf version 2. Its better to begin testing for maximum throughput from very low target. Iperf is an open source network bandwidth testing application, available on linux, windows and unix. Useful iperf commands for network troubleshooting sam kear. The d and r iperf client arguments measure the bidirectional bandwidths. Download the iperf installer file from the link above. This lead me to compiling the latest version of iperf3 i could find for windows since i couldnt find one.
As wireless lan professionals we can also use iperf testing to per. Jperf can be associated with iperf to provide a graphical frontend written in java. It is a powerful tool for testing the maximum achievable bandwidth in an ip network. Iperf has client and server functionality, and can create data streams to measure the throughput between the two ends in one or both directions. Check out the videos below for iperf charts with ui and commandline version. Nov 23, 2008 the free network tool iperf is among the more easytouse on the internet today. Tutorial to measure speed between two lan and wifi. Iperf allows the tuning of various parameters and udp characteristics. Iperf measures the maximum network throughput a server can handle and reports the results back to you. Download this app from microsoft store for windows 10 mobile.
Its better to begin testing for maximum throughput from very low target bandwidth b key, to ensure you get zero packet loss. Doubleclick on the downloaded iperf installer file. Performance monitoring of various network traffic generators core. Iperf free download iperf for windows 10, iperf 3 wifi speed test, iperf the network bandwidth measurement tool, and many more programs. Set the cpu affinity, if possible linux and freebsd only. We can run the iperf3 client with some very interesting arguments. Using the standard iperf tool will require you to manually type in the commands in a terminal window, both on the server and the client. In order to use iperf youll need to setup an iperf server, iperf clients can then connect to the server in order to run tests. Linux manual installation 64 bits amd64 by vivien gueant. Since this post is about how to install and use iperf on windows, i limit my explaination to installing and using iperf on a windows 78 computers with 3264bit processors respectively.
The software can be run in either server or client mode. The network link is delimited by two hosts running iperf. Arch linux 32 bits linux manual installation 64 bits amd64 by vivien gueant. Extract it, and if you want to do things faster copy its content into c. Follow instructions on how to install on windows or mac linux iperf installation. Packages are manually installed via the dpkg command debian package management system. This way, you will always have iperf3 at hand as a command on the prompt. The commands for using iperf on windows is exactly the same as in linux. Jul 27, 2018 iperf is available for windows, arch linux, ubuntu, android, ios, and more. Using iperf to test network speed and bandwidth throughput. It is a fairly straightforward process, and on the next page well talk about an easier way to use iperf. Before going ahead with the test, lets understand some networking concepts related to speed test.
Troubleshooting client speed using iperf cisco meraki. Iperf udp server reports the total bandwidth of the traffic received, lost packets, and jitter. There are several iperf gui implementations for windows. The operating system does not matter, while you are using iperf. Iperf udp client just blasts the maximum traffic you order, and the circuit either carries or drops it. Iperf s option tcp connection with a varying tcp window size f. How to use iperf to test network speed from host to host. The client is where you issue the bandwidth test parameters, and connect to a remote server. Iperf is a tool to measure the bandwidth and the quality of a network link. It comes in handy for network performance tuning operations. Dugan energy sciences network lawrence berkeley national laboratory nanog 43, brooklyn, ny june 1, 2008networking for the future of science 1. If you are on windows like me, you will get a compressed zip file. Iperf is a professional bandwidth test tool for qualifying performance of corporate networks and the internet.
1688 472 254 26 319 382 542 1545 1175 1662 987 1630 1099 1307 1084 987 1719 24 603 148 98 642 1634 806 1536 463 940 1477 271 486