Symptom
AirPort client computers cannot connect to the Internet through the software base station and may obtain unroutable 169.x.x.x IP addresses. The computer acting as software base station also may not be able to connect to the Internet.
Solution
1. Connect to the Internet using PPPoE software provided by your Internet service provider.
2. Check to be sure that the Internet connection is active using a Web browser or other Internet application.
3. With the Internet connection still active, open the AirPort Setup Assistant and set up the software base station.
Note: Wireless Internet access requires an Internet service provider (fees may apply) and AirPort (or AirPort-compatible) wireless Ethernet card and base station. Some ISPs are not compatible with AirPort. For more information, see technical document 106590: "AirPort: Requirements for Wireless Internet Access".