John, thanks for the feedback. Il giorno 11/ago/2010, alle ore 19.46, JohnS ha scritto: > That was my solution to use static IPs. on the Linux Machines only. You > do not see this under Windows. this reinforces my idea this is a dhclient bug rather than dhcpd's. >> Attached a txt with the tcpdump of the above log extraction. > > That dump is not long enough to tell anything funny going on. I know. I reported it to pair it with the the above messages log. It doesn't seem to me these packets contain the dhcp-client-identifier.. I am collecting port 67 traffic on the dhcp server since this afternoon. I hope to be able to find out more. -- Simone Caldana Senior Consultant Critical Path via Cuniberti 58, 10100 Torino, Italia +39 011 4513811 (Direct) +39 011 4513825 (Fax) simone.caldana at criticalpath.net http://www.cp.net/ Critical Path A global leader in digital communications