GP CC

Thank you Bob, By control session I was referrring to the TCP session used to transfer the results between client and server. For both a TCP and UDP test their is a TCP 'control session' setup to transfer the results, this is other than the actual throughput test. My error was for the UDP test, I just filtered on the UDP port 5201 so that did not include the TCP port 5201 'control session' to see the test result values. Another question please- Do you know for jitter, is this an average of the jitter...

Thank you Robert, I am using iPerf3, here is an example of a iPerf3 TCP result, which I can use to confirm the iPerf output numbers are good. Calculating using the bytes and time values. Both the client and server initiate a control session to provide the information below and another session to transfer the data. &{"cpu_util_total":2.6838240556517756,"cpu_util_user":0.59640534570039461,"cpu_util_system":2.0874187099513808,"sender_has_retransmits":1,"congestion_used":"cubic","streams":[{"id":1,"bytes":216000,"retransmits":0,"jitter":0,"errors":0,"packets":0,"start_time":0,"end_time":3.0000948905944824}]}....{"cpu_util_total":0.004532330218701819,"cpu_util_user":0,"cpu_util_system":0.0045369566190611617,"sender_has_retransmits":-1,"congestion_used":"cubic","streams":[{"id":1,"bytes":158400,"retransmits":-1,"jitter":0,"errors":0,"packets":0,"start_time":0,"end_time":3.0450551509857178}]}....

Hello, How does iPerf UDP provide results to the client? This is a bi-directional test with defaults for UDP I can see from a trace file that iPerf TCP uses the control session to pass the results, most specfically bytes and time of transfer. I am capturing iPerf UDP and while I maybe see a control session I cannot see anything that looks like results as in number if bytes transferred/received, jitter or loss. Any guidance or direction is appreciated. Thank you GP CC