I didn't write this - just found it while troubleshooting DHCP issues and thought other folks might find it useful :)

At a glance, it reminded me of a windows app I had found for DHCP testing too - https://github.com/CyberShadow/dhcptest

I just remember there being several different switches this program supported that aren't really documented well.

I think the one you linked only simulates a single client, if I read it right?

This one will simulate thousands of clients with different MAC addresses, allowing for DHCP infrastructure stress testing.