Key features of iperf3 include:

1. Bandwidth Measurement: iperf3 generates and measures TCP and UDP traffic to determine the maximum network throughput (bandwidth) between two devices. This helps you identify network limitations and bottlenecks.
2. Client-Server Architecture: The tool operates in a client-server mode. One machine runs as the server, while one or more other machines function as clients. The clients send data to the server, and the server measures and reports the achieved throughput.
3. Customizable Parameters: Users can adjust various parameters such as the duration of the test, the data rate, the size of the data blocks, and the number of parallel connections. This flexibility allows you to simulate different network scenarios.
4. TCP and UDP Testing: iperf3 supports both TCP and UDP testing. TCP testing is useful for measuring the reliability and congestion control of a network link, while UDP testing is suitable for assessing raw network throughput and potential packet loss.
5. Report Generation: After the test completes, iperf3 provides detailed reports on metrics such as throughput, jitter, and packet loss. This information helps network administrators and engineers analyze the network’s performance characteristics.
6. Cross-Platform Compatibility: iperf3 is available for various operating systems, making it a versatile tool for network testing across different environments.
7. Open Source: Being open-source software, iperf3 is free to use and can be customized or extended to fit specific testing needs.
8. Integration with Automation: Since iperf3 can be executed from the command line, it can be integrated into scripts and automated testing environments, enabling systematic and repeatable performance tests.

Keep in mind that iperf3 requires coordination between the client and server, and the results may vary based on factors such as network congestion, hardware capabilities, and the load on the involved devices.

To use iperf3, you typically need to run an iperf3 server on one machine and an iperf3 client on another. The client sends data to the server, and the server measures the performance and provides a summary report.

The basic syntax for running iperf3 on the command line is as follows:

• To start a server: iperf3 -s
• To run a client test: iperf3 -c server_ip_address

For more advanced options and configurations, you can refer to the iperf3  documentation and help resources.