The university I work at has a LAN. For the past two years, I have been attaching my Airport Express to the LAN and sharing an internet connection thus providing wireless access in my office. Fast forward to today, and I've acquired an Airport Extreme Base Station (AEBS), but I've been unable to get the AEBS to function like the Express. The AEBS doesn't seem to be able to acquire a usable IP number from the router. The IP numbers all seem to be provided by the AEBS rather that the DNS server from the LAN. Any help appreciated. Thanks.