I found this post to the dhcp-users mailing list: https://lists.isc.org/pipermail/dhcp-users/2011-July/013440.html It adds a new option ignore-client-uids to dhcpd. I applied the patch and recompiled my dhcp-server and it works exactly as intended. So, my problem is solved... /Nico -- Niklas Jakobsson - SysAdmin @ Netnod mailto:nico@netnod.se