Capturing / calculating real time TCP delay / RTT using iperf or similar tools

Question

I want to ask, how to capture or check TCP delay / RTT every time using iperf? because I only see UDP delay jitter capture in iperf. If iperf can't capture that, is there any tools to capture real time TCP delay/RTT?

Thank you

Answer 1

If you are running linux try the

$>ss -it

command.

This will provide you with the statistics of all ongoing TCP sessions.