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Questions tagged [iperf3]

15 questions
3
votes
3 answers

Wifi killer 1650 with AX 200 Chipset super slow on WINDOWS 5GHZ Wifi 6

I'm having a very slow connection with only 60Mbit-90Mbit in 5Ghz WiFi 6 WiFi Card killer 1650 (ax 200) chipset TP-link AX23 (put next to my pc) Windows OS I have tried to test speed with iperf3 with other devices with conclusion other devices…
david valentino
  • 81
1
vote
1 answer

Starting multiple iperf server instances with gnome-terminal

I want to use a script in Linux to start multiple instances of iperf3 as server like this: gnome-terminal -e --bash -c "iperf3 -s -B 10.10.1.1 -p 5021" gnome-terminal -e --bash -c "iperf3 -s -B 10.10.2.1 -p 5022" gnome-terminal -e --bash -c "iperf3…
Donmanolito
  • 13
1
vote
1 answer

Not able to achieve 10Gbe against one device

I have 3 different 10Gbe devices on my network and 2 switches. Switch 1 has a MacMini M2 with a 10Gbe ethernet connected via RJ45. Switch 2 have a Custom NAS and a Ubiquiti NVR connected via SFP+. Switch 1 is connected to Switch 2 via SFP+. Testing…
GreenLantern22
  • 81
1
vote
0 answers

High UDP packet loss in Windows 11 but not Ubuntu

So I'm at a loss (pun intended). I'm seeing packet loss but only on the return leg (showing in iperf but not WinMTR or ping), and only in Windows 11. If I boot up into Ubuntu 22.04, I get minimal loss (acceptable levels). This is heavily impacting…
Praemon
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1
vote
0 answers

UDP Throughput Dramatically Lowered with MTU = 1500

I am using iperf3 version 3.5 under RHEL 8.0 to test a 10 Gbps point-to-point Ethernet connection with UDP. I have the MTU on both the source and destination NICs set to 1500. I invoke iperf3 as follows: Server: iperf3 -s -V --udp-counters-64bit…
Dave
  • 1,129
1
vote
2 answers

How can I connect to my Wi-Fi AP at 1300 Mbps link speed?

I have a TP-Link Archer C80 that's advertised as a AC1900 MU-MIMO router. It doesn't support Wi-Fi 6 (802.11ax) but they advertise Wi-Fi speeds as: 5 GHz: 1300 Mbps (802.11ac) 2.4 GHz: 600 Mbps (802.11n) Now I have 3 Wi-Fi 6 (802.11ax) capable…
Vinayak
  • 10,885
0
votes
0 answers

iperf3 + retries Are Shown in iperf3 Output is diff when setting window size

I want to share the following issues. In iperf3, the default TCP window size is automatically managed by the operating system unless you explicitly specify a window size using the -w flag. I want to share the following cases. The first case is when…
King David
  • 1,001
0
votes
0 answers

iPerf and Port Forwarding WAN and LAN

I'll do my best to explain this setup correctly I have my iPerf server listening on port 5201 IP of the pc running the server is 10.xxx.xxx.131 PC is connected to a modem (default gateway 10.xxx.xxx.129) Modem is connected to a router (WAN…
bgardne7
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0
votes
0 answers

the right tool and the right way to measure network throughput

I am confused with different results of different tools here is what speed-test.net tells London, UK 87.48 ms 0.0% 404.94 Mbps 931.82 Mbps M247 Ltd - London Manchester, UK 114.50 ms N/A 58.52 Mbps 553.54 Mbps …
Shakiba Moshiri
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0
votes
0 answers

slow vpn tunnels speed on high speed network

I have some VMs with minimum network speed of 1G I need to connect each VM via a split tunnel. While the raw speed between VMs are 1G but over the tunnels , the speed is down to 10% of the max speed (100M). My question is that what and where are the…
Shakiba Moshiri
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0
votes
0 answers

Can iperf3 but cannot ping

One access point connected to a pc and one receiver connected to another pc. The access point and receiver are also connected to each other. Both PC have no firewall, security and antivirus. Both pc can iperf3, send and receive each other. The pc…
user3851491
  • 1
0
votes
0 answers

iperf3 design GUI

I am designing GUI for iperf3.exe. When I run iperf3.exe, the text box appears after it finishes the process. I want to read output while doing the process. I try async method and task but all the time process finish then read output. I can read…
Psydk00
0
votes
0 answers

slow local network wireless connection between linux laptops

I have two laptops on the same network in my house. I was trying to share files from one to the other via a web server I developed myself(static file sharing). I found it slow and tested the connection speed with iperf3. Result is: $ iperf3 -c…
buraky
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0
votes
0 answers

iperf3 fast in first second

i have a question to my iperf3 results. the connection i through a wireguard connection where the server is location in DE and the Client located in IL. Tests have been conducted from the server (DE) iperf3 -c 10.10.10.2 -p 20003 Connecting to host…
Dennis
  • 11
0
votes
1 answer

iperf3 asymmetric throughput on Dell PowerEdge T110 II

Dell PowerEdge T110 II server (Broadcom BCM5722 using tg3 driver, Intel(R) Core(TM) i3-2100 CPU @ 3.10GHz, Almalinux 8.5) has asymmetric iperf3 performance. When it is the server iperf3 tests at 940 Mbps, but when it is the client iperf3 tests at…
mathog
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