AP Pre-Image Download

--> AP Pre-Image Download allows the Access Point to download the updated or upgraded image from the controller without restarting the access point.

--> Without AP Pre-Image Download the Access Point downloads the upgraded image after restarting it, which causes a maximum network outage.

--> To minimize network outages, you can now download an upgrade image to the access point from the controller without resetting the access point or losing network connectivity.

--> After the access point discovers the controller with the new image, the access point downloads the new image, resets, goes into discovery mode, and rejoins the controller with less network outage.

--> At the time of reset, you must make sure that all of the access points have downloaded the image.The access point can store only two software images.

--> In order to perform AP Pre-Image download follow below steps,

i) Take Backup of Cisco Wireless Controller Configuration by Navigating to COMMANDS tab in WLC GUI and Select File Type Configuration in UPLOAD FILE menu.

ii) Upgrade Wireless Controller with new image by Navigating to COMMANDS tab in WLC GUI and select File Type Code Download FILE menu.

iii) Predownload the image to Access Point before rebooting the controller by executing the following command from WLC CLI.

(Cisco Controller) > config ap image predownload primary all

iv) Save the Configuration and reboot the controller. After reboot, WLC and all APs should be upgraded to the new version.

Md.Kareemoddin ( CCIE # 54759)