Does LinuxCNC work with on-board ethernet cards?

Hello.

We are about to buy new cnc controller from www.bzt-cnc.de with ethernet interface.

But I cannot find any info about linuxcnc configuration for network connected controller. Topics I saw here only mention Mesa boards.

How can I setup my PC to work with network connected controller? I don't have (and don't want to buy) Mesa board.
Controller itself is able to use buffering.

Thank you.

Mesa is really the only Ethernet solution, apart from EtherCat.

One thing you have to remember with Linuxcnc, is that Linuxcnc is the motion controller, the Mesa hardware, whether PCI, PCIe or Ethernet solution generate the required timing signals.
There is no buffering, that I have seemed mentioned or aware of, hence the need for a realtime operating system.

Unfortunately I was unable to open the website you linked to but I'm assuming they either have a plugin for Mach or custom software to talk to the controller. And no officially Linuxcnc does not support any USB controllers.