how to take two captures from two devices simultaneously
how can I take captures of two devices simultaneously
Have the devices communicate through a (managed) switch and capture from a properly configured mirror port on that switch.
they communicating with managed switch but how can I set it up in Wireshark and run the captures?
As long as the traffic from both devices passes through the mirror port, then a Wireshark capture on that mirror port will capture the traffic from both devices.
See the Wiki page on Ethernet Capture using a switch monitor port for more info.
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