From the AOS 6.3 user guide, pg 385:
To enable BSS transition management, you must advertise the 802.11k capability on the dot11k-profile that is
associated to a Virtual-AP profile. For more details on enabling 802.11k profile, see Enabling 802.11k Support on
page 377 .
Interaction between 802.11k and 802.11v clients
For 802.11k capable clients, the client management framework uses the actual beacon report generated by the client
in response to a beacon report request sent by the AP. This beacon report replaces the virtual beacon report for that
client.
For 802.11v capable clients, the controller uses the 802.11v BSS Transition message to steer clients to the desired
AP upon receiving a client steer trigger from the AP.
802.11v is selectable in Instant OS 4.1, via Instant 4.1 User Guide, page 109
Configuring a WLAN SSID for 802.11k Support
You can enable 802.11k support on a WLAN SSID by using the Instant UI or CLI.
In the Instant UI
1. Navigate to the WLAN wizard (click Network>New or Network> Select the WLAN SSID>edit).
2. Click the Security tab.
3. Under Fast Roaming, Select the 802.11k checkbox.
4. Click Next and then click Finish.