Make isc-dhcp-server PXE boot into WDS

The normal Linux way for DHCP to give direction for PXE boot is :

next-server 10.10.10.10;
filename "/pxelinux.0";

However WDS takes a different approach as it does not have a pxelinux.0 file.
Instead it presents a program called wdsnbp.com.
Easy fix, we just replace the lines above with:

next-server 10.10.10.12;
filename "boot\\x64\\wdsnbp.com";

Remember to restart the service :

/etc/init.d/isc-dhcp-server restart

UPDATE: Also have a look at this post to add support for UEFI:
http://tomas.solamail.no/2019/03/20/wds-uefi-bios-dhcp-options/

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