[K12OSN] How to get ThinClient LAN finding DHCP and booting?

[Leo Willems]

Dear friends,

I recently installed a K12LINUX F10 server with two NICs (eth0 and
eth1). eth0 is connected to the LAN and the K12 server get a IP via
DHCP and is online. eth1 is connected to the ThinClient LAN,  separate
network switch.

The ThinClients can not find a DHCP server and don't boot. How to make
sure the DHCP is running on the K12 server on eth1? And make sure the
ThinClient are booting from the server?

There is a 'virtual' NIC ltspbr0. What is it for?

Thanks
Leo