Wireshark for ethercat with TAP

[Philippe85]

 I make the test of :

https://eci.intel.com/docs/3.3/components/ethercat.html#ethercat-analysis-with-wireshark

Unfortunately the KUNBUS TAP is no longer produced  ! I Have  a Dualcomm TAP :

https://www.dualcomm.com/collections/network-tap/products/zero-delay-fast-ethernet-copper-tap

It seems that I have false positive.  I have a ethercat frame each millisecondes. but sometimes on wireshark I have 6 ms between 2 frames.

To be sure I have added the DC Clock Ethercat in my PDO trame , and when I see the value of DC clock between 2 frames with 6 ms gap , I actually have 1ms.

Has anyone already taken the test ?

wireshark is installed on linux/ubuntu22.04 and launch with very high priority.

[Philippe85 · Accepted solution]

Ok, after investigations , the Dualcomm TAP is not a real real-time ethernet analyzer ! what a shame !