Currently Being ModeratedMay 5, 2013 8:12 AM (in response to Kevin Delgadillo1)
Configure DNS in the Extreme, or just leave them blank. If they are configured in the Extreme is no need to specify them in the iMac's Network Preferences. I believe your Motorola 2210 DSL modem is just a modem, so it has no ability to specify DNS addresses.
That's probably not the problem though. That modem has a poor reputation and may be at fault also. Unfortunately you may not be able to rule out one or the other without substituting another device, and if you bring your Extreme to Apple for evaluation it will probably work just fine.
They are not known for premature failures. Except for a notorious power supply problem that affected only Time Capsule models some years ago, the Extremes have been very reliable.
If you have a Mac, see if the problem continues if you use one of the Extreme's LAN ports for connectivity. Turn off AirPort on your Mac to eliminate confusion. If the problem does not occur while using a LAN port, it would indicate a problem with using the Extreme's wireless radio.MacBooks iMacs iPads AirPorts, OS X Mountain Lion, 28 years Apple!
Currently Being ModeratedNov 17, 2013 10:29 PM (in response to Kevin Delgadillo1)
I know this is late, but we have had very much the same issue at our office. At first we thought it was due to overheating or due to a high number of attached devices (50+). Turns out the issue is with the latest firmware.
In order to resolve, we downgraded the firmware back to v7.6.1.
We replaced our original Airport Extreme through warranty. As soon as we set up the new one and updated to v7.6.4, we experienced the same issue. Upon downgrading everything seems to be working great!
You can downgrade in Airport Utility. Hold the Option key and click on the version number on the Airport Extreme.
Currently Being ModeratedNov 18, 2013 8:51 PM (in response to tommytomatoe)
Thanks, I ended up replacing my Airport Extreme with a new Time Capsule and the problem was resolved.
Now I use the Airport Extreme as a Wi-Fi Extender (rather than as a main base station) and it works fine in that mode.