Help setting up Airport with Comcast cable

Welcome to the discussions!

Cable modems must be completely reset any time there is a change in the device that the modem is connected to. The reason for this is that the modem "remembers" the device. If you had the modem connected to the computer and did not fully reset the modem, it is still looking for the computer. When it does not find it, it will not connect. You need to make the modem "forget" the computer. Here's how:

Push the reset button on the modem
Power it off immediately
Pull the battery if it is easily accessible
Wait 30 minutes

Power off the AirPort Extreme and everything else as well.

Connect the Modem to the AirPort Extreme with the ethernet cable
Power up the modem first and let it run by itself for 4-5 minutes
Then power up the AirPort Extreme the same way
Then power up your other devices the same way

The modem should now associate with the AirPort Extreme so that you can configure it and obtain an internet connection.

Message was edited by: Bob Timmons

Of course the most important part does not work, wi-fi.

Does that mean you can get Internet access if connected to the 802.11n AirPort Extreme Base Station (AEBSn) by Ethernet? Just not wireless?