Questions tagged [iperf]
For questions about the open-source software Iperf, where it is a widely used tool for network performance measurement and tuning. Remember that only questions in relation to on topic network devices are allowed.
40 questions
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iperf3 download and upload test simultaniously giving abnormal results
I have a server (Lenovo using Ubuntu) and 2 clients (both Mac). The server is connected with a Wi-Fi router over Eth interface. The two clients are connected with Wi-Fi router over WLAN interface. All ...
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Iperf testing- Slow transfer speeds [closed]
I'm doing Iperf testing at my company's branch office circuit and I'm getting results that are causing me concern.
I'm testing from a laptop through an access switch>distro switch> Fortigate> ...
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Mellanox (NVIDIA) SN3700 switch: Cumulus Linux configuration to force traffic path?
I want to stress all ports on a SN3700 switch with iPerf. I want to force the traffic to go through each port, so port 1 to port 2, port 2 to port 3, port 3 to port 4, etc.
The switch is running ...
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IPerf test| Server side Sender data shows that the bandwidth is zero but Client has bandwidth of 125 Mbps
I conducted Iperf3 test on my network. I received in server side that sender transfer bandwidth is zero but Client side showed a bandwidth of 125 Mbps.
What went wrong?
The command I wrote was Iperf3 -...
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Inconsistent behavior of link aggregation
I'm testing bandwidth between two switches and I noticed link aggregation behaves inconsistently between test runs. I'm testing with a single instance of iperf with 2 streams. Sometimes the load is ...
- 101
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Is it possible to conduct a bandwidth test using iperf between two computers located on different network? [closed]
Is it possible to check bandwidth using iperf between two computers on different networks (i.e., geographically apart)? I researched a lot, and every answer on Stack Exchange or any other website ...
user73506
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Bandwidth, Latency, Download speed and Upload speed
In the midst of trying to diagnose a slow vpn issue, I'm getting a bit confused by the various metrics being mentioned by the many different techs I've been speaking with.
From what I understand, ...
- 111
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how to send a number of TCP packets and capture only those packets using tshark?
I'm using iperf3 to send 1005 TCP packets with the commands:
iperf3 -s -i 1 -f m -p 5200 -D
iperf3 -c 10.60.0.113 -k 1005 -bitrate 0 --reverse --omit 2 -p 5200
In server, client respectively.
The ...
- 121
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502
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pinging with iperf vs without iperf
I am running a basic point to point topology on mininet. If I do h2 ping h1, I get such rtt values:
rtt min/avg/max/mdev = 0.028/0.067/0.129/0.022 ms
But when I ping while the iperf is measuring, my ...
- 101
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Iperf results on Bandwidth and Transfer do not make sense
I'm having trouble understanding why iperf is behaving the way it is. I'm just trying to send UDP traffic from a Raspberry Pi to my Computer.
This is what it looks like on the Client Side:
pi@...
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IPerf3 UDP does not meet specified bitrate [closed]
We are currently performing tests over a wireless network and are having some issues trying to get the correct configuration of iperf3.
Our server side command line is as follows
iperf3 -s -p 5101
...
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iperf without TCP server
I'm running packets through an FPGA that doesn't support TCP. I'd like to test the performance of the link with a tool such as iperf. Since iperf uses TCP to communicate metadata it's a bit of a show ...
- 113
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TCP cwnd is increasing when congestion occur
I am a newbie network engineer.
I did a small experiment with iperf3. But I run into a small problem.
(1) My question.
I think TCP flow do not act properly despite of its congestion control.
The flow ...
- 125
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Why I cannot see packet loss on GRE over capacity tunnels?
I have the following topology set on AWS where there are 4 CSR 1000v Routers deployed and Segment Routing enabled in which the Segment Routing Headend is R1 and the destination is R3.
I aim to send ...
- 145
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Understanding Throughput of interfaces problem on Cisco Routers
I have the following topology set on AWS where there are 4 CSR 1000v Routers deployed and Segment Routing enabled in which the Segment Routing Headend is R1 and the destination is R3.
I aim to send ...
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