Internet Offline: IPv6 ipref

Install

apt install iperf

Benchmarking IPv6

Server side:

$ iperf -s -V

Client side:

$ iperf -c <Server IPv6 Address> -V>

Client side:

$ iperf -c <Server IPv4 Address>

Bandwidth

Use the -F or -I option. If you want to test how your network performs with compressed / uncompressed streams, just create representative streams and use the -F option to test it. This is usually due to the link layer compressing data.

The -F option is for file input.
The -I option is for input from stdin.

E.g.

Client: $ iperf -c <server address> -F <file-name>
Client: $ iperf -c <server address> -I