DHCP all the way!!!
I always install machines and then reserve the MAC address within their DHCP server. The beauty of this is that you can nuke the network card settings knowing that when the machine boots back up again, it will still have the same IP address.
Solotime - I am assuming that your machine picked up a 169.254.x.x address. This will happen on just about all equipment when DHCP / BOOTP doesn't get responded to within a certain timeframe. You can get your laptop of desktop to do the exact same thing by simply plugging a network cable from your laptop directly to a desktop or another laptop. Because neither of them host a DHCP / BOOTP service, they will eventually obtain a 169.254.x.x IP address. After they have obtained this IP address, you should then be able to talk between them as they will both be on the 169.254.x.x range, unlike you copier which was the only piece of equipment on that range.
I have sites that I service which have a MAC address whitelist used in conjunction with their DHCP server which only allows computers with a MAC address in that whitelist to actually obtain an IP. The reason this is done is stop rogue computers from being placed on the network which may create a security risk in the event that they are infected with a virus, but can't get an IP address to further spread the virus.
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