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Questions tagged [iperf]

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How to fix the amount of bandwidth of iperf in tcp mode?

I'm working on some experiments about my master's degree project. I'm studying some load-balancers (I'm not supposed to cite them here) and the aim is to get for each bandwidth the cpu % usage of a load-balncer x. I'm using iperf to send traffic to…
user2567806
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Network connection slow to server, only from one device

I have looked around, but there doesn't seem to be anyone with the same problem. I am getting almost no connection from my console (laptop) to one of my servers (Raspberry Pi 2 B) . All other devices connect to it fine. Here are the specs of…
asimovwasright
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Slow local area network speeds

Updated on 2014-10-09 Disclaimer This question is similar to Unexplained slow gigabit network speeds but because the latter is still unanswered after 5 years, and that I think I'm able to add more details, I'm posting another question on this…
Pierre
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Network Performance / SMB-CIFS / Guidance

I'm an IT professional working out of my home office. I'm having some performance problems (NAS file copies) which I'm trying to isolate, using iperf. My question is on iperf. Infrastructure - Gigabit switches (Netgear), not crossing switches. All…
Just4Fun
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iperf test in reverse direction gives different result

I used iperf to measure the max throughput for TCP connection between two ubuntu machines. Both the machines were directly connected be means of a 1Gbps cable. When I performed iperf tests i obtained a bandwidth of 845 Mbps on an average. But when i…
kishore
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Iperf bidirectional bandwidth measurement

Server side: # iperf -s ------------------------------------------------------------ Server listening on TCP port 5001 TCP window size: 85.3 KByte (default) ------------------------------------------------------------ [ 4] local 192.168.24.243 port…
user123933
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Iperf udp test show only 50 % of bandwidth

I test bandwith with iperf. I set up UDP protocol. I'm trying to setup limit from 10 to 100 megabit/s. Until 90 megabit max speed is correct. When I write -b 100m or don't write this speed become only 50 megabit/s. Why?
Dmitry Dashko
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Can't get multicast to work (iperf)

I have some problems to get SLP (service location protocol; I play around with the OpenSLP implementation) to work. It uses multicast on 239.255.255.253, port 427. To narrow down the problem I decided to test the multicast connection with iperf…
Robert Hegner
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iperf - first packet loss and acceptable jitter

I'm using iperf to test the bandwidth on my network. I have a few questions: 1. I'm running this command on the client: "iperft -c -u -b 400m" and it successfully runs. I'm running the command every few seconds. I've found that if I run them too…
Charles
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iperf installation and use

I would like to use iperf to test my WAN bandwidth connection. However, I can't find a good method to install and administer it. I'm a Windows guy and don't know much about Linux, and googling iperf didn't help much. Do I need to run the server…
Charles
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Can I pull data from server to client with Iperf?

To test bandwidth, I just can push data from client to server with iperf. But can i pull data from server to client ? that is like webserver, the client request data, then server give data to client?
larry
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benchmark tcp: ab or iperf like tool to send hex/binary/pcap data?

I have written a server in Twisted for a current project I'm working on, and now I need to test it. It receives TCP packets, with the payload consisting of just a serialised binary string. I want to be able to test the server for…
olan
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Throughput tool with decent graphing

I've been looking through some of the tools available for generating traffic to measure maximum network throughput, namely iperf, bwping, ttcp, etc. I am planning on doing throughput tests over a long period of time, so what I really need is good…
Cory J
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iperf3: Multiple user Streams test does not start

Im trying to use iperf3 to test where issues lie at a client that uses RDP to connect to our terminal-server. Their issue is that the RDP window freezes (mouse clicks mostly still go trough). Sometimes minimizing an maximizing the RDP windows helps,…
asdfmoin
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iPerf3 --reverse different results (2.5GB link)

I recently purchased 2.5GB adapters for my main Desktop (Windows 10) and NAS server (Ubuntu 20.04). When testing with iPerf3 FROM Windows, I only get 1GB. But when I use the --reverse flag, I get the 2.5GB (or close enough). This occurs whether the…
EngageBasic
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