tse ip core ，I have dataout on rgmii ，but I can't receive data by wireshark’

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I'm using a windows system, and I don't have much experience with wireshark, or controlling Ethernet traffic through my machine. So I'm using a USB-Ethernet adapter to create a dedicated Ethernet interface on my laptop that is not being used by my PC for anything else. I found that using wireshark to capture on a dedicated Ethernet interface listening to only my FPGA was a big help in seeing the traffic being generated in the FPGA. You either get nothing or packets from your hardware. Once I had got the Ethernet header correct, wireshark helped me debug the rest of the packet.

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Sorry，when i debug my FPGA，i only use one ethernet interface that listening to my fpga.So what is the different between direct use of cable and USB-Ethernet adapter。Thank you!