Throughput Testing (iperf3)
iperf3 is a standard open-source benchmarking tool for measuring maximum TCP and UDP bandwidth performance. You can use iperf3 to verify wire-speed throughput on 100BASE-T1 networks using the FC602 or on 10BASE-T1L networks using the FC621.
Before you begin
Download
You can benchmark throughput across Windows PCs, Linux hosts, Raspberry Pi boards, or embedded targets running FreeRTOS/lwIP.
Download the latest pre-compiled iperf3 binary archive for Windows and extract it to a folder of your choice. Open a terminal (cmd or PowerShell) inside the extracted directory to run iperf3.exe.
Install iperf3 directly via your distribution's package manager (or download it from iperf.fr):
sudo apt update
sudo apt install iperf3
Setup
Usage
Start the iperf3 server on Endpoint A to listen on the default TCP/UDP port 5201:
iperf3 -s
Expected server terminal output:
-----------------------------------------------------------
Server listening on 5201
-----------------------------------------------------------
Accepted connection from 192.168.1.101, port 50234
[ 5] local 192.168.1.11 port 5201 connected to 192.168.1.101 port 50235
[ ID] Interval Transfer Bitrate
[ 5] 0.00-1.00 sec 11.3 MBytes 94.8 Mbits/sec
[ 5] 1.00-2.00 sec 11.3 MBytes 94.9 Mbits/sec
[ 5] 2.00-3.00 sec 11.3 MBytes 94.9 Mbits/sec
...
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate
[ 5] 0.00-10.00 sec 113 MBytes 94.9 Mbits/sec receiver
On Endpoint B, start the iperf3 client and specify the IPv4 address of the server:
iperf3 -c <ip-address>
# Example:
iperf3 -c 192.168.1.11
Expected client terminal output (100BASE-T1 wire speed ~95 Mbit/s):
Connecting to host 192.168.1.11, port 5201
[ 5] local 192.168.1.101 port 50235 connected to 192.168.1.11 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 11.4 MBytes 95.4 Mbits/sec 0 120 KBytes
[ 5] 1.00-2.00 sec 11.3 MBytes 94.9 Mbits/sec 0 120 KBytes
[ 5] 2.00-3.00 sec 11.3 MBytes 94.9 Mbits/sec 0 120 KBytes
...
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 113 MBytes 94.9 Mbits/sec 0 sender
[ 5] 0.00-10.04 sec 113 MBytes 94.5 Mbits/sec receiver
iperf Done.