Ask Wireshark - RSS feed questions and answersenCopyright Wireshark Foundation, 2017-2020Wed, 17 Oct 2018 13:05:44 +0000How does Wireshark plot missing tcp.analysis.ack_rtt values? all, I am just wondering how Wireshark plots **tcp.analysis.ack\_rtt values** for the RTT graph when they don't appear to be in the column. I have attached an image of the Wireshark plot and my own plot, you can see when I am plotting there appears to be information missing which I have got from the Wireshark tcp.analysis.ack\_rtt column. Could this be something to do with the `ERTT` where the `ERTT = ((1-Alpha)*Current RTT)+(Alpha * next measured RTT)`? Wireshark plot: ![image description](/upfiles/15397971928067769.jpg) My own plot: ![image description](/upfiles/15397972283057451.jpg) Any help would be much appreciatedjackpcraigWed, 17 Oct 2018 13:05:44 +0000