After updating 4x25G related .bin file into N3000 and rsu the bmc , when i checked the information with command of "sudo fpgainfo phy", port 0, port 1 and port 3 were all down and only port 2 was up. However, in the case of 8x10G, after updating binary file, all ports were up automatically without any other operations when checking the info.
Then my question is why there is only port 2 is up in 4x25G mode? And any solutions to make all ports up?
The question has been solved after an external traffic generator was used.
The reason may be when i use 8x10 G mode the cable was linking QSFP A with QSFP B for a loop so the links were all up；while in the case of 4x25 G, the QSFP B is disabled actually, but the cable still was linking the QSFP A with QSFP B.
If I am wrong please let me know.
Thank for your reply again!