Draytek VigorAP 802 User Manual page 54

Fast Roaming
(WPA2/802.1x)
After finishing this web page configuration, please click OK to save the settings.
(defined in the field of With Adjacent AP RSSI over) is detected by
VigorAP 802, VigorAP 802 will terminate the network connection for
that wireless station. Later, the wireless station can connect to the
adjacent AP (with better RSSI).
With Adjacent AP RSSI over – Specify a value as a threshold.

Enable – Check the box to enable fast roaming configuration.
PMK Caching - Set the expire time of WPA2 PMK (Pairwise master key)
cache. PMK Cache manages the list from the BSSIDs in the associated
SSID with which it has pre-authenticated. Such feature is available for
WPA2/802.1 mode.
Pre-Authentication - Enables a station to authenticate to multiple
APs for roaming securer and faster. With the pre-authentication
procedure defined in IEEE 802.11i specification, the
pre-four-way-handshake can reduce handoff delay perceivable by a
mobile node. It makes roaming faster and more secure. (Only valid in
WPA2)
Enable - Enable IEEE 802.1X Pre-Authentication.
Disable - Disable IEEE 802.1X Pre-Authentication.
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