IEEE 802.11r reduces the time required for authentication and minimizes the interruption when a WLAN client moves from one AP to another. These interruptions typically last for several hundred milliseconds.
Fast roaming with the Inter Access Point Protocol (IAPP) enables you to operate IEEE 802.11r directly on your APs. Until now, a WLC was required for this purpose.
In order to use fast roaming with IAPP, you need to assign an individual IAPP passphrase in the WLAN encryption settings for each interface. This is used to encrypt the pairwise master keys (PMKs). APs that share a matching IAPP passphrase (PMK-IAPP secret) are able to exchange PMKs between themselves and ensure uninterrupted connections.
In LANconfig, the IAPP passphrase is entered under and clicking on WLAN encryption settings. Open the configuration dialog box for the appropriate interface and switch to the Advanced tab.
