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Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 3.2.171.6
OL-11567-02
Installation Notes
Upgrading to a New Software Release
When a controller is upgraded, the code on its associated access points is also automatically upgraded.
When an access point is loading code, each of its lights blinks in succession.
Caution Do not power down the controller or any access point during this process; otherwise, you might corrupt
the software image! Upgrading a controller with a large number of access points can take as long as 30
minutes. The access points must remain powered, and the controller must not be reset during this time.
Cisco recommends the following sequence when performing an upgrade:
1. Upload your controller configuration files to a server to back them up.
2. Turn off the controller 802.11a and 802.11b networks.
3. Upgrade your controller to the latest software release, following the instructions in the latest version
of the Cisco Wireless LAN Controller Configuration Guide. Click this link to browse to that
document:
http://www.cisco.com/en/US/products/ps6366/products_installation_and_configuration_guides_lis
t.html
4. Re-enable your 802.11a and 802.11b networks.
Note Controllers can be upgraded from one release to another. However, should you require a downgrade from
one release to another, you may be unable to use the higher release configuration. The workaround is to
reload the previous controller configuration files saved on the backup server or to reconfigure the
controller.
Installation Notes
This section contains important information to keep in mind when installing your controllers and access
points.
Warnings
Warning
This warning means danger. You are in a situation that could cause bodily injury. Before you work on
any equipment, be aware of the hazards involved with electrical circuitry and be familiar with
standard practices for preventing accidents.
Warning
Only trained and qualified personnel should be allowed to install, replace, or service this equipment.