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MWeng3's avatar
MWeng3
Icon for New Contributor rankNew Contributor
6 years ago

why do I see packets on the user side of the 25G MAC when no fiber is plugged in?

If I have no fiber plugged in to the board QSFP28+, I am getting random packets on the user side of the 25G MAC; avalon_st_rx_startofpacket/endofpacket/data etc. with correct looking avalon_st_rx_err...
Deshi_Intel's avatar
Deshi_Intel
Icon for Regular Contributor rankRegular Contributor
6 years ago
Hi Mark, Can you share with me your Ethernet connection setup diagram on how everything is connected to FPGA 25G Ethernet IP ? One suggestion for you is can you try out 25G Ethernet example design to see if you are able to duplicate issue ? This will helps to ensure you have all the correct setting. Other common debug practice will be to ensure FPGA power, clock and reset operation is handle correctly and within spec. Thanks. Regards, dlim