My original question was how to get a static IP with an Airport Extreme router. After browsing the vault that is MR forums, I've found that answer, but that brought up another question for me. I set up the static IP by using System Preferences on my MacBook. Naturally it works fine when on my home network, but what happens when I travel? If the remote router doesn't distribute the IP address I've selected, will the MB search out a replacement?