Примечания к выпуску для Cisco Cisco 2106 Wireless LAN Controller
12
Release Notes for Cisco Wireless LAN Controllers and Mesh Access Points for Release 4.2.207.54M
OL-31336-01
Software Upgrade Procedure
Software Upgrade Procedure
When you upgrade the controller’s software, the software on the controller’s associated access points is
also automatically upgraded.
also automatically upgraded.
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, depending on the size of your network. The access points must remain powered, and the
controller must not be reset during this time.
the software image. Upgrading a controller with a large number of access points can take as long as 30
minutes, depending on the size of your network. The access points must remain powered, and the
controller must not be reset during this time.
Caution
Controller software releases 4.2.207.54M is greater than 32 MB; therefore, you must verify that your
TFTP server supports files this size. Two TFTP servers that support files of this size are tftpd and the
TFTP server within the WCS. If you download the 4.2.207.54M mesh software and your TFTP server
does not support greater than 32 MB file size, the following error message appears: “TFTP failure while
storing in flash.”
TFTP server supports files this size. Two TFTP servers that support files of this size are tftpd and the
TFTP server within the WCS. If you download the 4.2.207.54M mesh software and your TFTP server
does not support greater than 32 MB file size, the following error message appears: “TFTP failure while
storing in flash.”
Caution
Refer to the
before starting any software upgrade.
Note
When upgrading to an intermediate software release as part of the 4.2.207.54M controller software
upgrade, ensure that all access points associated with the controller are at the same intermediate release
before preceding to install the next intermediate or final version of software. In large networks, it can
take some time to download the software on each access point.
upgrade, ensure that all access points associated with the controller are at the same intermediate release
before preceding to install the next intermediate or final version of software. In large networks, it can
take some time to download the software on each access point.
Note
Upgrading directly from release 4.1.192.35M to release 4.2.207.54M resets the controller to factory
defaults. You should first upgrade from release 4.1.192.35M to 4.2.176.51M and then to 4.2.207.54M.
defaults. You should first upgrade from release 4.1.192.35M to 4.2.176.51M and then to 4.2.207.54M.
Caution
A backup of your controller configuration file is recommended prior to any software upgrade. Without
this backup, you will need to manually reconfigure the controller should the configuration file be lost or
corrupted or you need to downgrade.
this backup, you will need to manually reconfigure the controller should the configuration file be lost or
corrupted or you need to downgrade.
Follow these steps to upgrade the mesh controller software using the controller GUI.
Step 1
Upload your controller configuration files to a backup server.
Step 2
Follow these steps to obtain the mesh controller software and the associated boot images from the
Software Center on Cisco.com:
Software Center on Cisco.com:
a.
Click this URL to go to the Software Center:
b.
Click Wireless Software.
c.
Click Wireless LAN Controllers.