Cisco Cisco 2106 Wireless LAN Controller

Cisco recommends that you install the Cisco Unified Wireless Network Controller Boot Software 
5.2.157.0 ER.aes file on all controller platforms. This file resolves CSCsm03461 and is necessary 
in order for you to view the version information for ER.aes files in the output of the show sysinfo 
CLI command. If you do not install this ER.aes file, your controller does not obtain the fix for this 
defect, and “N/A” appears in the Emergency Image Version field in the output of this command.

The ER .aes files are independent from the controller software files. You can run any 
controller software file with any ER.aes file. However, installing the latest boot software file 
(5.2.157.0 ER.aes) ensures that the boot software modifications in all of the previous and 
current boot software ER.aes files are installed.

If you require a downgrade from one release to another, you may lose the configuration from your 
current release. The workaround is to reload the previous controller configuration files saved on the 
backup server or to reconfigure the controller.

 lists the controller software releases that support specific Cisco access points. The First Support 

column lists the earliest controller software release that supports the access point. For access points that 
are not supported in ongoing releases, the Last Support column lists the last release that supports the 
access point.

1000 Series

AIR-AP1010

3.0.100.0

4.2.207.0

AIR-AP1020

3.0.100.0

4.2.207.0

AIR-AP1030

3.0.100.0

4.2.207.0

Airespace AS1200

—

4.0

1100 Series

AIR-LAP1121

4.0.155.0

—

AIR-LAP1131

3.1.59.24

—

AIR-LAP1141N

5.2.157.0

—

AIR-LAP1142N

5.2.157.0

—

1200 Series

AIR-AP1220A

3.1.59.24

—

AIR-AP1220B

3.1.59.24

—

1230 Series

AIR-AP1230A

3.1.59.24

—

AIR-AP1230B

3.1.59.24

—

AIR-LAP1231G

3.1.59.24

—

AIR-LAP1232AG

3.1.59.24

—

1240 Series

AIR-LAP1242G

3.1.59.24

—

AIR-LAP1242AG

3.1.59.24

—