You may create a static IP using the NetReg system either when you register your machine or by visiting NetReg after you have registered and changing your registration.
Point your browser to http://netreg.duke.edu and enter your NetID and password. You'll be directed to your main NetReg page, where you'll see a list of all computing devices you've registered using your NetID.
You'll probably see one or more Hostnames which look like this:
Hostname Hardware Address Mode IP Address NETREG-XXXXX.DORM.DUKE.EDU 000F1B1C1D1E dynamic 0.0.0.0
You can convert this dynamic Hostname/IP address assignment to a static IP/vanity name by doing the following:
In approximately 5 minutes, the vanity hostname will be assigned in the DNS system, and your computer will be able to obtain the designated static IP address. We recommend that you continue using DHCP to obtain your IP address and network configuration information, however, as this ensures your computer will receive any necessary changes.