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Questions tagged [iperf]

A network test tool.

15 questions
8
votes
2 answers

Start iperf3 deamon at startup

I want headless server (running Ubuntu Server 19.10) to be listening for iperf3 request constantly, even after reboot. Currently, I can run it on the terminal using the -c and -d flags which runs it as a daemon (which I think just means in the…
exharris
  • 173
2
votes
1 answer

Perf top - warning perf not found for kernel

I downloaded perf program for Ubuntu using this command: sudo apt-get install linux-tools-common linux-tools-generic But when I try perf top it gives me this WARNING: perf not found for kernel 4.9.78-xxxx You may need to install the following…
edward
  • 59
1
vote
2 answers

Can I assign any IPv4 address I want to a network interface in Ubuntu?

Title basically reveals what I want to learn. Theoretically, I can assign an IPv4 address via ifconfig , for example ifconfig myInterface 172.16.25.125. However, I could not make sure whether this causes any…
Eric
  • 43
1
vote
1 answer

Is it possible to run multiple Iperf clients simultaneously?

Is it possible to run iperf clients simultaneously such that if I have 10 servers bound to some machine B, and I have 10 clients on machine A, and all the servers have distinct IP addresses, could I run all of these clients at the same time via…
Eugene Tan
  • 21
1
vote
0 answers

iperf connection failed

I am very new to networking, and slightly more familiar with Ubuntu CLI. I am trying to test speeds across my home LAN from a laptop connected via ethernet, to a server connected ethernet. They both have the same version of iperf, and the server…
Xavier Quinn
  • 11
1
vote
0 answers

Inconstant Bandwidth despite Bandwidth Limitation in VirtualBox

In VirtualBox, I have two Ubuntu 18.04 VMs running on an Ubuntu 18.04 host. My target is to simulate network traffic between the two VMs (one as a Server, one as a Client). Therefore I set the VM adapter settings to Internal Network. So basically,…
jjulianf
  • 491
0
votes
1 answer

WARNING: did not receive ack of last datagram after 10 tries

I try making network performance measurement using iperf in UDP option. I perform all the operations in Ubuntu Terminal. I have two computer and I have number of interfaces on each of my computers. Interfaces other than Loopback and Local Host are…
Eric
  • 43
0
votes
1 answer

Conflicting information being reported for RTL8125 2.5Gb, not getting full speeds

I'm using Ubuntu 22.04.4 LTS with an RTL8125 on the motherboard and a Windows 10 workstation with a SD-PEX24066 NIC using the same RTL8125 chipset, the switch is a QNAP QSW-1105-5T. I've set the MTU to 9000 via netplan and the config sets 9000 on…
loserspearl
  • 1
0
votes
0 answers

error iperf3, no route to host

I'm trying to do a speed test with iperf. I've set up two linux virtual machines, running this command on one: iperf3 -s and this command on the other: iperf3 -c The client gives me the following error: unable to connect to…
Creepzzz
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0
votes
0 answers

Brand new 802.11ax (WLAN6) laptop is slow on iperf3

I own a brand new Lenovo Thinkpad X1 Extreme Gen 2 my WiFi AP is an AVM Fritz! Box 4040. The AP is capable of 802.11ac. The notebook is certified for Ubuntu 18.04 (see link above). I run Ubuntu 19.10, because of the newer kernel. I also have a…
Powerriegel
  • 210
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0
votes
2 answers

iPerf :WARNING: did not receive ack of last datagram after 10 tries

client side: iperf -c 10.0.1.5 -u Client connecting to 10.0.1.5, UDP port 5001 Sending 1470 byte datagrams, IPG target: 11215.21 us UDP buffer size: 9.00 KByte (default) [ 28] local 10.0.1.2 port 10055 connected with 10.0.1.5 port 5001 [ 28]…
Abinaya Perumal
  • 91
0
votes
1 answer

who kill my iperf on remote Ubuntu 14.04?

I have a remote server with Ubuntu 14.04 and iperf 2.0.5. And also have a local device, which is use to test the throughput between local and remote server. But a strange thing is sometimes the iperf progress on server been killed by unknow…
Weitao Yan
  • 1
0
votes
0 answers

Perf does not annotate .c files called by Rust

I am using perf to profile a rust application which calls some .c files. I want to annotate the .c functions. However in the perf report i can find only rust code annotated. I have compiled the binaries using debug arguments( -g, -pg enabled). I…
RNA
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-1
votes
3 answers

Cannot find tcpprobe in ubuntu

I want to use tcpprobe to record the state of a TCP connections but I cannot find tcpprobe in /proc/net. Is tcpprobe not present by default? tcpprobe
Noober
  • 277
-1
votes
1 answer

How to install iperf2 in Ubuntu?

How to install iperf2 tool in Ubuntu 18.04.1? without Internet connection.
hongmeix
  • 1