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	<title>MaddHat.comperformance | MaddHat.com</title>
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		<title>Testing Network Performance Using Iperf</title>
		<link>http://maddhat.com/testing-network-performance-using-iperf-3</link>
		<comments>http://maddhat.com/testing-network-performance-using-iperf-3#comments</comments>
		<pubDate>Wed, 11 Mar 2009 01:09:46 +0000</pubDate>
		<dc:creator>MadHatter</dc:creator>
				<category><![CDATA[Bash]]></category>
		<category><![CDATA[Education]]></category>
		<category><![CDATA[Linux]]></category>
		<category><![CDATA[Technology]]></category>
		<category><![CDATA[Troubleshooting]]></category>
		<category><![CDATA[iperf]]></category>
		<category><![CDATA[network]]></category>
		<category><![CDATA[performance]]></category>

		<guid isPermaLink="false">http://maddhat.com/?p=34</guid>
		<description><![CDATA[Just a quick post on a great tool for testing network performance. Iperf is a very slim tool that will measure TCP/UDP bandwidth performance. It is an available ubuntu package “iperf ” and also has Windows/OSX binaries available. I found a working mirror here. What makes Iperf a good test versus a simple SMB/CIFS transfer for bandwidth performance is that it works in memory versus being limited by hard drive and CPU limitations. Now a quick guide to get things up and running. The guide will be for two Ubuntu machines, testing network performance between the two. 1.Install – Type the following in terminal “sudo apt-get install iperf ” for both machines 2.Server Setup &#8211; Decide upon a server machine and a client. On the server type the following in terminal “iperf -s ”. This will place iperf in server mode, and it will listen for incoming connections. 3.Client Setup - On the client machine you have a lot of options to play around with regarding how you want to connect to the server. You can explore what each of these are by typing “iperf –-help ”. The following is a simple test between the server (192.168.2.104), and the client [...]]]></description>
			<content:encoded><![CDATA[<p>Just a quick post on a great tool for testing network performance.  Iperf is a very slim tool that will measure TCP/UDP bandwidth performance.  It is an available ubuntu package “<strong>iperf</strong> ” and also has Windows/OSX binaries available.  I found a working mirror <a title="iperf" href="http://noc.pregi.net/iperf.html" target="_blank">here</a>.  What makes Iperf a good test versus a simple SMB/CIFS transfer for bandwidth performance is that it works in memory versus being limited by hard drive and CPU limitations.</p>
<p>Now a quick guide to get things up and running.  The guide will be for two Ubuntu machines, testing network performance between the two.</p>
<p><strong>1.Install</strong> – Type the following in terminal “<strong>sudo apt-get install iperf</strong> ” for both machines</p>
<p><strong>2.Server Setup</strong> &#8211; Decide upon a server machine and a client.  On the server type the following in terminal “<strong>iperf -s</strong> ”.  This will place iperf in server mode, and it will listen for incoming connections.</p>
<p align="center"><img src="http://maddhat.com/wp-content/uploads/2009/03/iperf_server2.png" alt="iperf server" width="481" height="144" /></p>
<p><strong>3.Client Setup -</strong> On the client machine you have a lot of options to play around with regarding how you want to connect to the server.  You can explore what each of these are by typing “<strong>iperf –-help</strong> ”.  The following is a simple test between the server (192.168.2.104), and the client (192.168.2.103).</p>
<p><strong>4.Testing -</strong> Type “<strong>iperf 192.168.2.104 -i 2</strong>” (replacing the IP here with the test server IP and then enter key to start testing.  This will connect to the server running on 192.168.2.104 and have an interval of 2 seconds.  There will then be 6 tests completed.  This should give you all of the information you need regarding your connection speed between the two machines.</p>
<p align="center"><img src="http://maddhat.com/wp-content/uploads/2009/03/iperf_client2.png" alt="iperf client" width="481" height="209" /></p>
<p>This should be enough to get you started using iperf.  Check out the man page <a title="iperf man page" href="http://staff.science.uva.nl/~jblom/gigaport/tools/man/iperf.html" target="_blank">here</a> if you have any usage questions.</p>
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