The airport extreme should be connected as just a device with the cisco router handling DHCP and NAT. in the airport configuration go to the Network Tab and click the double headed arrow under Router Mode set it to "Off(Bridged Mode)
Setting Up Time Capsule for the First Time on a Mac. The first quick way we’ll look at is the basic … Apple Introduces New AirPort Extreme with 802.11n - Apple Jan 09, 2007 Apple announces new AirPort Extreme and Time Capsule with
It comes as both a base station and a smaller, plug-into-the-wall Beacon—think Airport Extreme and Express, although the Beacons don't act as a standalone—that blanket your house in robust Wi-Fi.
Mar 11, 2020 Amazon.com: Apple AirPort Express Base Station (MC414LL/A The affordable, all-new redesigned Apple AirPort Express makes it easy to set up and manage a secure home Wi-Fi network from your iPhone, iPad, iPod touch, or Mac. Simultaneous dual-band 802.11n automatically provides the fastest connections available for your Wi-Fi-enabled devices. airport extreme | Newegg.com
wifi - Airport Extreme not working with new modem - Ask
Setting Up Time Capsule for the First Time on a Mac. The first quick way we’ll look at is the basic … Apple Introduces New AirPort Extreme with 802.11n - Apple Jan 09, 2007