The error message, "Your computer is registered in the networking database, node state is good, but you have a non-routable ip address.", usually means there was a glitch during the registration process and someone needs to review it. This most often happens when you start (but do not complete) the registration process on one network (e.g., Stanford Residences) and resume the process on a different network (e.g., Stanford). However, this may also arise due to an unknown issue.
From our understanding, the computer (instead of our network) in question must have assigned the computer the "non-routable IP address" (probably the registration IP address). One simple way to eliminate this issue as a possibility is to do the following:
1. make sure DHCP is on, DNS is set to automatic
2. Forget both networks (Stanford & Stanford Residences)
3. Turn WiFi off
4. Wait a minute
5. Turn WiFi on again
This will clear the "memory" of an old IP address, and will get you connected again by finding a new, correct one.
If this doesn't fix your issue, then someone with the right access needs to resolve it manually. To expedite the process you can locate and provide the hardware address (also known as a MAC address) for the device (Here are instructions on how to find it) and Submit a Request for assistance.
Support staff will notify you when the issue is resolved or ask for additional information if necessary.