I have a FPGA board from Xilinx. It has 3 SFP28 ports. When I use a DAC cable (MCP2M00-A002) to connect 2 of the ports, the ports come up. But when I use your AOC (MFA2P10-A003), the ports won't be up. Why?
YOu should contact Xilinx as seems like an issue with Xilinx and cable.