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Force static IP

Hey all, I'm using a Mac Os X (darwin unix) gateway.  It is set up as a dhcp server.  However, if I set one of the machines internally (windows xp) and I specify its static ip address... will the gateway know that it exists?  i.e.  the max os server is port forwarding to i specify that the windows machine is  If the gateway reboots, and reassigns ip's, will it still know that the windows machine is 33?  

3 Solutions
edkim80Author Commented:
btw.. if possible I do not want to touch the gateway machine ( change the dhcp to always assign the ip to the MAC address)
you need to specify a reservation address in your dhcp server, or an exclusion range.  Specify the ip of the xp machine in the exclusion range, and you'll be fine.

A good DHCP server will verify the existance of an IP ( by sending a ICMP echo --- like PING) before lease an address. So if are "force" a static IP address for some engine around, should not be any conflict . The best method is fo assign an IP address outside the pool of DHCP server. Yes , another method is to remove some IPs from pool on server or to reserve some IP based on MAC address.
the two main options here are to use a static outside the current dhcp range or to reserve it from the dhcp server side. Several Good dhcp servers will assign overtop a current static address which cause interesting headaches later.

edkim80Author Commented:
thanks..excellent info

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