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Determine the cause of package delay in TCP

asked 2023-03-01 11:24:37 +0000

updated 2023-03-01 11:51:56 +0000

grahamb gravatar image


I am part of a team that develops a robotic cell, and we have a master PC that runs on Ubuntu. The PC sends data in MQTT JSON protocol via router to a master IO-Link.

We are experiencing random delays in communication, which can be up to 5 seconds at times. I used Wireshark to analyze the communication and have attached three examples of the captured streams.

In addition I noticed that there were some corrupted packets at the start of some of the streams.

As I am not very experienced with networking, I am hoping for some guidance on what our next steps should be to resolve this issue.

Thank you.

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answered 2023-03-01 12:42:30 +0000

hugo.vanderkooij gravatar image

That is something to investigate on the server. Wireshark can't tell WHY this delay occurs. Only WHEN it does occure.

But it is as a reponse to a POST request so it could be that it take 2 seconds to process your POST request. This must be investigated on the "server". So I guess you need o open a support ticket with them to find out.

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Asked: 2023-03-01 11:24:37 +0000

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Last updated: Mar 01