releasing ip address


Does anyone know how to release an IP from a DHCP server on OS 10.1 Last night I kept getting a 255.XXX.XXX IP address. I could surf the web, but I couldn't use Microsoft Outlook (in classic) although I could send and receive e-mail using Figured the f-ed up IP had something to do with, but couldn't figure out how to release it for the life of me. Had to reboot, ending my 8 consecutive days without one :mad: Oh yeah, I'd like to do this through the terminal as I'm a bit of a dork, but any method is ultimately fine.