If you are having problems where your AirPort Base station or router is unrecognized and connected to a DSL/Cable modem, the issue may be attempted distribution of IP addresses from the AirPort
Nov 11, 2011 Amazon.com: Apple AirPort Extreme Base Station ME918LL/A Apple outdid themselves when they put the AirPort Extreme Base Station on the market. It’s so easy to set up, a dead person could do it. I’ve had numerous routers and wi-fi extenders and this has the best coverage, stronger than advertised signal and speed by far. How to Setup An Airport Extreme - YouTube
Cisco AnyConnect VPN not connecting to Apple AirPort
Sometimes the quickest fix is to just turn AirPort off on your Macs and devices for a few moments and then turn it on again. On a Mac you do this using the AirPort menu bar, or using Control Center
I have a 2009 Apple Airport Extreme. Quite often,  once a week or so,  I was losing my Internet connection and I would have to reboot  the base station to fix it.  After reading a few forums I discovered there is a bug in the most recent Apple AirPort Extreme base station firmware.
Appleholic, (noun), æp·əl-hɑl·ɪk: An imaginative person who thinks about what Apple is doing, why and where it is going. Delivering popular Apple-related news, advice and entertainment since Apr 26, 2018 · The units are not the least expensive on the market but are about the same price as Apple was charging for the AirPort Extreme. Considering that my Apple WiFi network needed a total of two Extremes and an Express to cover the house - a 2000 sq. ft. bungalow - and the AX 6000 gives much better speed in the bedrooms on the opposite side from the Issues with Apple Airport Extreme (5th edition) by Chris778160 on Oct 30, 2014 at 19:21 UTC 1st Post. Apple. Solved. 3. Next: Copy Files MAC OS X. Get Up for sale an Apple Airport Extreme 6th Generation 802 11ac ModelME918 Works well, no issues. Just changed our provider. Works with giving great strong Wifi when hooked up to the phone internet service. apple airport extreme update free download - Apple AirPort Extreme Update, AirPort Extreme Firmware Update, AirPort Extreme Driver Update 2005-001, and many more programs