Cisco Cisco 2106 Wireless LAN Controller Release Notes

Release Notes for Cisco Wireless LAN Controllers and Lightweight Access Points for Release 6.0.182.0

OL-31336-01

Software Release Information

–

If you are upgrading through the service port, the TFTP or FTP server must be on the same
subnet as the service port because the service port is not routable, or you must create static
routes on the controller.

–

If you are upgrading through the distribution system network port, the TFTP or FTP server can
be on the same or a different subnet because the distribution system port is routable.

–

A third-party TFTP or FTP server cannot run on the same computer as WCS because the WCS
built-in TFTP or FTP server and the third-party TFTP or FTP server require the same
communication port.

•

You can upgrade or downgrade the controller software only between certain releases. In some
instances, you must first install an intermediate release prior to upgrading to software release
6.0.182.0.

Table 1

shows the upgrade path that you must follow before downloading software release

6.0.182.0.

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
6.0.182.0 software. In large networks, it can take some time to download the software on each
access point.

•

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.

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
(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.

Table 1

Upgrade Path to Controller Software Release 6.0.182.0

Current Software Release

Upgrade Path to 6.0.182.0 Software

3.2.78.0 or later 3.2 release

Upgrade to a 4.1 release and then upgrade to 4.2.176.0 before
upgrading to 6.0.182.0.

4.0.155.5 or later 4.0 release

Upgrade to 4.2.176.0 before upgrading to 6.0.182.0.

4.1.171.0 or later 4.1 release

Upgrade to 4.2.176.0 before upgrading to 6.0.182.0.

4.1.191.xM

Upgrade to 4.1.192.35M before upgrading to 6.0.182.0.

4.1.192.xM