We have heaps of availiable IPs in the address range, but sometimes when
doing quite a bit of imaging to several machines the client refuses to
get an IP. If we release an IP from another client then the new machine
can then obtain one, however it does not seem to get any of the vacant
IPs that are available.

I have extended the DHCP timeout variable on the TFTP server. What is a
good value for this variable.

Does anyone have any other ideas?