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Creating a RTT Graph

asked 2017-12-14 08:39:53 +0000

ille gravatar image


I want to make a RTT graph for some TCP stream, but I'm not sure how to do it. Should I make a filter in IO graphs based on specified TCP Stream and a source IP address of the server (NOT Mine IP because I read that the RTT is calculated unidirectional) and on Y axis to make filter like tcp.analysis.ack_rtt. Is this a right way to see RTT graph. Also, why Round Trip Time from TCP Stream Graphs displays the RTT values with my IP address as a source IP address.

Thank you in advance.

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answered 2017-12-15 07:15:49 +0000

Christian_R gravatar image

updated 2017-12-15 07:16:48 +0000

Why don´t you just use, the Round Trip Time Graph?

Statistics -> TCP Stream Graphs -> Round Trip Time
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Because, as I say RTT Graph from Statistics -> TCP Stream Graphs displays values which are with my IP address as a source IP address, and I read here that a RTT graph from TCP Stream has some errors

ille gravatar imageille ( 2017-12-15 11:00:06 +0000 )edit

O.k. I can imagine a few solutions, so my question is: what is your goal with that graph just to see the rtt for one session?

Christian_R gravatar imageChristian_R ( 2017-12-15 18:32:35 +0000 )edit

I want to compare RTT for different streams on same conversation. But, however, let they be from one conversation, not for one stream. My point above all is should I use tcp.analysis.ack_rtt as a filter on Y axis and source IP address of the server (or remote user) in the filter field, because I don't want to see RTT of few microseconds which is generated from my IP address as a source IP, because as I know RTT is unidirectional.

ille gravatar imageille ( 2017-12-15 21:05:25 +0000 )edit

Yes you can do so, but you must decide which value of RTT you will draw (MAX, Average, MIN). Otherwise I would compare the RTT Graphs of the different Streams, maybe by using Screenshots or so.

Christian_R gravatar imageChristian_R ( 2017-12-19 19:22:23 +0000 )edit

Thank you ChristianR I will use those filters (source IP address of the server (or remote user) and tcp.analysis.ackrtt)

ille gravatar imageille ( 2017-12-19 22:20:19 +0000 )edit

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Asked: 2017-12-14 08:39:53 +0000

Seen: 14,987 times

Last updated: Dec 15 '17