This occurs if the downloaded file is corrupted or if you skipped a required intermediate upgrade path. Re-download the file and check its MD5 checksum.
Step-by-Step Guide: Cisco 2500 Series Wireless Controller Firmware Update
Are you experiencing memory leaks, random controller reboots, or client de-authentications? Chances are high that a maintenance release addresses these known bugs. cisco 2500 series wireless controller firmware update
The WLC automatically sets the newly downloaded image as the primary boot image. If it doesn't, manually swap it using config boot backup or via the Commands > Boot Options menu in the GUI.
The Graphical User Interface is the most common method for updating the Cisco 2504 Go to product viewer dialog for this item. Cisco WLC - Upgrading software This occurs if the downloaded file is corrupted
Note: This command tells the controller to push the primary boot image to all joined APs.
From the GUI, navigate to , select Configuration as the file type, and specify your TFTP server details. Chances are high that a maintenance release addresses
> save config
This is identical to the FUS transfer, but you will specify the main image name. The transfer may take a few minutes depending on your network speed.
From the CLI (or GUI Commands menu), execute:
: Downloading firmware from the Cisco Software Download portal requires a valid service contract. 2. Upgrade Procedure via GUI