SMC Networks 2555W-AG2 User Manual page 135

information form a Security Association that the access point names and holds in
a cache.
• Preauthentication: Each time a client roams to another access point it has to be
fully re-authenticated. This authentication process is time consuming and can
disrupt applications running over the network. WPA2 includes a mechanism,
known as pre-authentication, that allows clients to roam to a new access point and
be quickly associated. The first time a client is authenticated to a wireless network
it has to be fully authenticated. When the client is about to roam to another access
point in the network, the access point sends pre-authentication messages to the
new access point that include the client's security association information. Then
when the client sends an association request to the new access point, the client is
known to be already authenticated, so it proceeds directly to key exchange and
association.
To configure WPA, click Security under Radio A or Radio G. Select one of the VAP
interfaces by clicking More. Select one of the WPA options in the Authentication
Setup table, and then configure the parameters displayed beneath the table.
6
Radio Interface
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