Cisco Cisco 2106 Wireless LAN Controller

Cisco Aironet 1000, 1100, 1130, 1140, 1200, 1240, 1250, and 1310 indoor access points.

Release 4.2.207.54M does not support Cisco 1520 (1522, 1524) series mesh access points. 
Cisco 1520 series mesh access points are supported in release 5.2 (and later) of the controller 
mainline release.

Enterprise mesh is not supported in 4.2.207.54M.

The 1140 and 1250 series access points have a hardware limitation where beacons can only 
be output at intervals that are multiples of 17 milliseconds. When these APs are configured 
for a 100-millisecond beacon interval, they transmit beacons every 102 milliseconds. 
Similarly, when the beacon interval is configured for 20 millieconds, these APs transmit 
beacons every 17 milliseconds.

Refer to the Cisco Aironet 1500 Series Outdoor Mesh Access Point Hardware Installation Guide and 
Getting Started Guide for details on the physical installation and initial configuration of the mesh access 
points at: 

Refer to “Monitoring Wireless Devices” (Chapter 6) in the Cisco Wireless Control System Configuration 
Guide, Release 6.0 for details on monitoring the mesh network (access points, links, statistics, alarms) 
at:

You can downgrade from 4.2.207.54M to release 4.1.192.35M. You cannot downgrade to any other mesh 
release (4.1.190.5, 4.1.191.24M, or 4.1.192.22M).

A downgrade to any previous release resets the controller to the factory default configuration.

 lists the names of the images associated with this release.