Fast Reconnects

Fast reconnect is a negotiation between the client and the AP that uses information exchanged in the initial authentication to expedite the reestablishment of a session.

Fast Reconnect allows wireless clients to move between APs on the same network without repeated authentication request. For example, if a user roams during a conversation, the authentication causes minimum possible interruption when fast reconnects are enabled. It also minimizes the impact on each client during a temporary network outage by enabling the client to reconnect to the server automatically and restart.

The different fast reconnect roaming methods used to optimize roaming time are TLS session, 802.11r, CCKM, and OKC. For more information on TLS and 802.11r, refer to Configuring EAP-TLS for Cisco ACS and ISE and Enabling 802.11r.