A10 SGMII to SGMII communication

Hello there,

I'm trying to build my Ethernet system using Arria 10 SoC board. Now, I'm able to have a successful communication between the FPGA and my PC through ethernet port (all TX/RX packets are working fine). But when I plug the ethernet cable between two FPGAs directly no response is found and all LEDs are off. I believe it is something related to configuring TSE MAC and SGMII? any helps or suggestions would be highly appreciated.

Thank you in advance.