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i can see you configured its zynq ethernet  GMII module in vivado, does it work? have you tried it with lwIP examples to check if udp transport works?

you got some nice looking board with a heatsink, mine came as if it was found in a dumpster, with dust and corrosion. but surprisingly
it works fine. i agree this is a bargain considering specs with zynq 7010. 
 
 
 

I have the exact same issue randomly.

Look at this, it might help.

What hardware do you have?

At least for Mesa hardware and parallel ports, the GUI configurators
(pncconf  amd MesaCT for Mesa and stepconf for parallel ports)
know how to setup tandem axis for gantry machines.
 

Nevermind.  The CNC box and the power strip remained powered off for about an hour.  I powered on the the power strip and CNC box and knew immediately when the Ethernet lights next to the port were lit that a connection probably could be made.  I launched LinuxCNC and should be okay now.