Users Guide

Parameter Description
read-only Read-only role
no access Negates any configured parameter.
Server
Group
Name of the group of servers used to authenticate administrative users. See the CLI
command aaa-server-group, in the CLI Command Reference Guide for more information.
Configuring AP Image Preload
The AP image preload feature minimizes the downtime required for a controller upgrade by allowing the APs
associated to that controller to download the new images before the controller actually starts running the new
version.
This feature is supported only on the W-7000 Series and W-7200 Series controllers.
This feature allows you to select the maximum number of APs that are allowed to preload the new software
image at any one time, thereby reducing the possibility that the controller may get overloaded or that network
traffic may be impacted by all APs on the controller attempting to download a new image at once.
APs can continue normal operation while they are downloading their new software version. When the
download completes, the AP sends a message to the controller, informing it that the AP has either successfully
downloaded the new software version, or that the preload has failed for some reason. If the download fails,
the AP will retry the download after a brief waiting period.
You can allow every AP on a controller to preload a new software version, or also create a custom list of AP
groups or individual APs that can use this feature. If a new AP associates to the controller while the AP image
download feature is active, the controller will check that AP’s name and group to see if it appears in the preload
list. If an AP is on the list, (and does not already have the specified image in its Flash memory) that AP will start
preloading its image.
Once a software version has been downloaded, another version cannot be downloaded until the AP reboots.
Enable and Configure AP Image Preload
Use the following procedures to enable and configure the AP Image Preload feature on the W-7000 Series and
W-7200 Series controllers using the WebUI or CLI.
In the WebUI
1. Navigate to Maintenance > WLAN > Preload AP Image. If this feature has not yet been enabled, the
window will display the message “AP Image Preload status is Inactive. Click here to activate AP Image
Preload.” Click the link in the warning message to enable this feature and display the AP Image Preload
settings.
2. Configure the settings described in the table below, then click Apply to save your changes.
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