Connecting 2 TSE (with micrel PHY) each other: Link down

I'm using Quartus Prime 18.1. Autonegotiation is on on both TSE. Chip PHY is micrel KSZ9031MNX. I'm trying at 100 Mbps.

I'm using a simple sw confioguration from Eclipse, written to read/write PHY registrer using MDIO interface on TSE, without problem. I can read/write all my PHY registers

• With PC NIc Card : Link goes UP 100 Mb full-duiplex (cross cable, but runs with straight one due to MDI-X capabiliy)
• Connecting TSE A to B with same cross cable Link never goes UP

So, circuits and HW should be ok, PC NIC connection is stable... When connect TSE togheters, probably there is some actions at low network level that NIC PC card does and both TSE+PHY don't performs. I must discover what..... :-(

(I tried to connect TSE_A to TSE_A on MII internal side, inside FPGA and they runs fine with my frames applications.)

If anyone knows this issue, I say thanks for any suggestion