what I want to do is hand out specific IP addresses to all workstations etc
based on their MAC addresses. This I can do by manually setting the
address and associating it with the MAC address, but the dhcp server then
hands out an address with no (or a very long) expiry. I need to set which
machine has which ip address, but I also want to use dhcp to change the ip
addresses (or subnet etc) now and then (hence I don't want to use static
ips). Can I do that, or will changes made to the server just be ignored by
the clients once a non ending lease has been offered?