Cisco Cisco 2106 Wireless LAN Controller
6
Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 4.2.130.0
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
4.2.130.0 software. In large networks, it can take some time to download the software on each
access point.
points joined to the controller are upgraded to the intermediate release before you install the
4.2.130.0 software. In large networks, it can take some time to download the software on each
access point.
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Cisco requires you to install the Cisco Unified Wireless Network Controller Boot Software
4.2.112.0 ER.aes file on the following controllers: 4400 series, Cisco WiSM, and Catalyst 3750G
Wireless LAN Controller Switch. It is optional on other controller platforms. This file resolves
CSCso00774 and is necessary to ensure proper operation of the controller. If you do not install the
ER.aes file, your controller does not obtain the fix for this defect, and “Error” appears in the
Bootloader Version field in the output of the show sysinfo command.
4.2.112.0 ER.aes file on the following controllers: 4400 series, Cisco WiSM, and Catalyst 3750G
Wireless LAN Controller Switch. It is optional on other controller platforms. This file resolves
CSCso00774 and is necessary to ensure proper operation of the controller. If you do not install the
ER.aes file, your controller does not obtain the fix for this defect, and “Error” appears in the
Bootloader Version field in the output of the show sysinfo command.
Note
When you install the ER.aes file, a new bootloader file is also loaded. This is true for all
controllers except the 2106 controller, for which the bootloader is not upgradable.
controllers except the 2106 controller, for which the bootloader is not upgradable.
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
(4.2.112.0 ER.aes) ensures that the boot software 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
(4.2.112.0 ER.aes) ensures that the boot software 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.
Table 1
Upgrade Path to Controller Software Release 4.2.130.0
Current Software Release
Upgrade Path to 4.2.130.0 Software
3.2.78.0 or later 3.2 release
Upgrade to 4.0.206.0 (or a later 4.0 release) before upgrading to
4.2.130.0.
4.2.130.0.
4.0.155.5
Upgrade to 4.0.206.0 (or a later 4.0 release) before upgrading to
4.2.130.0.
4.2.130.0.
4.0.179.11
4.0.206.0 or later 4.0 release
You can upgrade directly to 4.2.130.0.
4.1.171.0 or later 4.1 release
You can upgrade directly to 4.2.130.0.
4.2.61.0
You can upgrade directly to 4.2.130.0.
4.2.99.0
You can upgrade directly to 4.2.130.0.
4.2.112.0
You can upgrade directly to 4.2.130.0.