I think.i made a rookie mistake, I got two ex3300, I borrowed a dac from a friend.and tested.all 10g ports work (when dac plug in the web interface shows the port is green up), so I returned the canle and went to buy some used finisar cable myself.

Fast forward, I received my cable today and none of the ports works anymore. I was frustrated and about to contact the seller, but just reread the description it says AOC cable, so I never thought there are two types of cables look exactly the same but the AOC cable apparently doesn’t work with my switch and NIC.

I googled for a while but I read somewhere it says the AOC and DAC is interchangeable, I am just so confused, do I need to configure anything to make the AOC cable work? Or I have to buy DAC cable