Problems with Mac OS X Clients

[Adrian Merwood]

Hi,

I am running 2 different (alternating) DHCP 3.0.3 servers - 1 on 
Mandrake 2006 and 1 on CentOS.  They both exhibit the same behaviour.  
They will happily serve up DHCP addresses to anything on my network 
except for the OS X systems.  I see the following sequence in the log 
when I try to request DHCP address from my OS X laptop:

May  6 20:15:32 gateway dhcpd: DHCPREQUEST for 192.168.1.64 from 
00:16:cb:07:49:93 via eth1: lease 192.168.1.64 unavailable.
May  6 20:15:32 gateway dhcpd: DHCPNAK on 192.168.1.64 to 
00:16:cb:07:49:93 via eth1
May  6 20:15:32 gateway dhcpd: DHCPDISCOVER from 00:16:cb:07:49:93 via eth1
May  6 20:15:32 gateway dhcpd: DHCPOFFER on 192.168.1.195 to 
00:16:cb:07:49:93 via eth1
May  6 20:15:33 gateway dhcpd: DHCPDISCOVER from 00:16:cb:07:49:93 via eth1
May  6 20:15:33 gateway dhcpd: DHCPOFFER on 192.168.1.195 to 
00:16:cb:07:49:93 via eth1
....and so on

The 192.168.1.64 address is from another network served by a built in 
DHCP server on an ADSL router which happily serves up addresses to OS X.

I am at a loss to explain why simplistic built in DHCP servers such as 
the one in my Router work but the bog standard ISC DHCP server on either 
of my linux systems will not work with the OS X dhcp client?

Any and all suggestions would be most welcome.

Adrian