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Questions tagged [iperf]

Iperf is a network testing tool for performance and tuning that can create TCP and UDP data streams and measure the throughput of a network that is carrying them.

Iperf is a network testing tool for performance and tuning that can create TCP and UDP data streams and measure the throughput of a network that is carrying them.

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Load generation using iperf

I have controller and its topology created using mininet. I need to generate traffic among hosts of topology via iperf, so that the controller is loaded and it can not handle. Is there command to generate huge number of packets at a time or large…
Krati Jain
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NS-3 dce and iperf3

In NS-3 DCE (Network simulator 3 Direct Code Exectution), with NS-3 version 3.21 and dce version 1.4, one of the included binaries by default is iperf. This version of iperf is 2.0.5 however, and the newest version of iperf is 3.0.10. Since iperf3…
Michaël Kint
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How does Iperf 2.x client detect the amount of traffic it has sent?

If one executes for example iperf -c 178.62.60.141 -fm -b 100m -u -t 30 -i 10, then after each 10 second interval, Iperf client prints out the amount of data it has transferred in mebibytes: root@vserver:~# iperf -c 178.62.60.141 -fm -b 100m -u -t…
Martin
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How do I pipe to a text file the command prompt output from iperf to a file

I am trying to start an iPerf server (its a program similar to ping), and pipe its output to a .txt file. On another PC, the client is sending traffic to this IP address. Here is the command : start "LocalFLServer" iperf -s -w 1024k -i 2 -B…
YouHaveaBigEgo
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iperf bandwidth; what is the difference between -b 60m and -b 60M

I am using iperf and have the following problem iperf ... -b 60M, I have 12% packet loss iperf ... -b 60m, I have 0.2% packet loss In both of these cases, the bandwidth is 60 Mbit/s 0.0-10.0 sec 71.0 MBytes 59.6 Mbits/sec 0.150 ms 0/50661…
Aman
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How to increase TCP bandwidth in Iperf

In IPERF we have a option to increase the target bandwidth with the option "-b 100m" but in TCP i dont see a option in both JPERF 2.0.2 and also in cli command. Please let me know how can i increase the bandwidth for my throughput testing since i…
deva
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Delete certain line while using iperf

I run iperf command like this : iperf -c 10.0.0.1 -t 2 -f m -w 1K | grep -Po '[0-9.]*(?= Mbits/sec)' I want to display throughput only such as 0.32 but because I use 1K here, there is a warning and the display becomes WARNING: TCP window size set…
bnbfreak
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How to display output of iperf cmd prompt in textbox

I am using iperf-2.0.5-2-win32 tool to find network bandwidth. I have written codes in c# which opens the cmd prompt, pass iperf parameters to start server side & client side. iperf-2.0.5-2-win32 exe will not open directly, need to open through cmd…
user1244453
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iperf, sctp command not recognized in command-promt

I'm using iperf3 that is supposedly a rewritten version of iperf. Reason why Im using this is because I love iperf when it comes to TCP and UDP throughput and I now want to test SCTP throughput between my end-points. However when I'm trying to use…
user1634254
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How to display all bandwidth values in iperf

I want to capture all bandwidth value in iperf not only Mbits size but also bits and Kbits as well. [3] 0.0 - 1.0 sec 128 Kbytes 1.05 Mbits/sec [3] 1.0 - 2.0 sec 0 Kbytes 0.00 bits/sec [3] 2.0 - 3.0 sec 90 Kbytes 900.5 Kbits/sec So far I know…
bnbfreak
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Throughput decreases after MTU 5000

I am trying to test throughput between two computers directly connected through 1 GbE and testing with iperf. I am getting a throughput around 980Mbps when MTU is between 5000 and 5050, however it drastically falls to around 680Mbps anything above…
forrestGump
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bash script average of two values

I have a bash script that runs iperf and outputs the average bandwdith ie 3.80 Mbits/sec. What i'd like to do is get this output as an average of the connection speed. So if I have a 10Mbit connection i'd like to know what 3.80 Mbits/sec is of that…
Lurch
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How can I output only the average bandwidth of 5 parallel connection using Iperf3?

I have the following line in a shell script: bandwidthOutput=$(iperf3 -c 127.0.0.1 -R --parallel 5 --format M --version4) And I want to only save the average bandwidth (Upload speed) in $bandwidthOutput. How do I do this? I tried using awk, but I…
Quackx
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iPerf claims it's using same TCP window size when given -w with different requested size but rate is different

I am testing a network device bandwidth with iperf 2.0.10 and seeing weird issues. When I am using command iperf -c [dst_ip] -w [window size] and specify window size with different values (250 KByte and 300 Kbyte), iperf outputs TCP window size: 432…
keye
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Bash or python scripting of iperf for different ip addresses

How can I achieve the following using python or bash? iperf -s -B 234.5.6.7 -u -f m -i 1 let the above command run for 5 seconds kill the above process (e.g. killall iperf) iperf -s -B 234.5.6.8 -u -f m -i 1 let the above command run for 5…
user258699
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