Cisco Cisco 2106 Wireless LAN Controller
5
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.1.185.0
OL-31336-01
Software Release Information
Note
When you upgrade the controller to an intermediate software release, wait until all of the
access points joined to the controller are upgraded to the intermediate release before you
install the 4.1.185.0 software. In large networks, it can take some time to download the
software on each access point.
access points joined to the controller are upgraded to the intermediate release before you
install the 4.1.185.0 software. In large networks, it can take some time to download the
software on each access point.
•
Cisco recommends that you also install the Cisco Unified Wireless Network Controller Boot
Software 4.1.185.0 ER.aes file on the 2106 controller. This file resolves bootloader defects and is
necessary to ensure proper operation of the controller. The ER.aes file is required only for the 2106
controller.
Software 4.1.185.0 ER.aes file on the 2106 controller. This file resolves bootloader defects and is
necessary to ensure proper operation of the controller. The ER.aes file is required only for the 2106
controller.
Note
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
(4.1.185.0 ER.aes) ensures that the bootloader modifications in all of the previous and
current boot software ER.aes files are installed.
controller software file with any ER.aes file. However, installing the latest boot software file
(4.1.185.0 ER.aes) ensures that the bootloader modifications in all of the previous and
current boot software ER.aes files are installed.
Caution
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.
current release. The workaround is to reload the previous controller configuration files saved on the
backup server or to reconfigure the controller.
Follow these steps to upgrade the controller software using the controller GUI.
Step 1
Upload your controller configuration files to a server to back them up.
Note
Cisco highly recommends that you back up your controller’s configuration files prior to
upgrading the controller software. Otherwise, you must manually reconfigure the controller.
upgrading the controller software. Otherwise, you must manually reconfigure the controller.
Step 2
Disable the controller 802.11a and 802.11b/g networks.
Step 3
Disable any WLANs on the controller.
Step 4
Follow these steps to obtain the 4.1.185.0 controller software and the Cisco Unified Wireless Network
Controller Boot Software 4.1.185.0 ER.aes file from the Software Center on Cisco.com:
Controller Boot Software 4.1.185.0 ER.aes file from the Software Center on Cisco.com:
a.
Click this URL to go to the Software Center:
b.
Click Wireless Software.
c.
Click Wireless LAN Controllers.
d.
Click Standalone Controllers, Wireless Integrated Routers, or Wireless Integrated Switches.
e.
Click the name of a controller.
f.
Click Wireless LAN Controller Software.
g.
Click a controller software release.
h.
Click the filename (filename.aes).
i.
Click Download.
j.
Read Cisco’s End User Software License Agreement and then click Agree.