Anytime you change ISPs or networking hardware, you should perform a complete power recycle of all of your networking gear. Please try the following:
- Power-down the Time Warner modem, AirPort Extreme Base Station (AEBS), and computer(s).
- While all of the devices are still powered down, verify that the Ethernet cable coming from the modem is connected to the WAN (circle of dots) port on the AEBS.
- Perform a "factory default" reset on the AEBS. After the reset has completed power-down the AEBS.
- Power-up the modem; wait at least 10-15 minutes to allow it enough time to initialize.
- Power-up the AEBS; wait at least 5-10 minutes to allow it enough time to initialize. (Note: Because you performed a reset, the AEBS' status light may continue to flash amber. This is typically ok as it is telling you that some additional configuration steps, like enabling wireless security, will still be needed.)
- Power-up your computer(s).
All network clients should now be able to access the Internet through the AEBS connected either by wire or wireless. Please post back your results.
I have had the same issue for the past few weeks and finaly it is resolved. I had the regular modem from Timewarner and it was working perfectly with my AEBS for the past 2 years. No issues at all. Out of nowhere 3 weeks ago my mo AEBS started getting the 169.x.x.x ip address therefore not communicating with the modem. Cutting the story short, I had Timewarner's Tier 1, 2 and 3 involved. 3 different techs and their suppervisors visited my house pointing finger at the Apple and I contaced Apple and got no resolutions either. The AEBS at somepoit would connect to the internet and then stop communicatiog due to invalid ip address. I decided to change my modem to a more advanced modem ARRIS TG852 (Telephony modem with wireless) from TimeWarner. That did not solve the issue either. I also tried the solution Tesserax offered above but unfortunatly it did notwork for me. as of one houre ago I resolved the problem and would like to share it with you.
Standard Timewarner modem:
1. Call Timewarner and have the tech support configure your modem remotely into a Bridge Mode. (yes that simple)
2. Factory reset you AEBS and go through the setup.
ARRIS modems or any other wifi capable modems/routers:
1. Call Timewarner and have the tech support configure your WiFi modem remotely into a Bridge Mode. (yes that simple) Sadly enough non of the techs offered this to me or was even aware that this will resolve the issue. Now they know. LOL
1. Get to your routers setup page. for ARRIS go to http://192.168.100.1
2. Login as admin and use default password "password" to login.
3. go to Firewall tab and disable the firewall (your AEBS will have its own firewall)
4. to to Wireless tab and Disable wireless (uncheck the box)
5. go to LAN tab and under the NAT title which is close to the bottom of the page select "Bridge"
This option will reset your modem. Give it a few minutes for your modem to reestablish connections with its center and come back to life.
Now your Timewarner WiFi modem is turned into a dumb modem (bridge mode) and your AEBS will work like a charm.
6. Factory reset you AEBS and go through the setup.
It only took me 3 weeks to figure this out by trying any possible combination of settings and resetings and reconfiguration you can imagin. I have recreated this issue and resolved it following these steps and it worked for me. I hope it works for anyone else that may be facing the same challenge.