SMC Networks SMC2555W-AG - Manual (Page 65)

Advanced Configuration
5-9
Radius
Remote Authentication Dial-in User Service (RADIUS) is an
authentication protocol that uses software running on a central
server to control access to RADIUS-aware devices on the
network. An authentication server contains a database of user
credentials for each user that requires access to the network.
A primary RADIUS server must be specified for the
SMC2555W-AG to implement IEEE 802.1x network access
control and Wi-Fi Protected Access (WPA) wireless security. A
secondary RADIUS server may also be specified as a backup
should the primary server fail or become inaccessible.
Note: This guide assumes that you have already configured RADIUS
server(s) to support the access point. Configuration of RADIUS
server software is beyond the scope of this guide, refer to the
documentation provided with the RADIUS server software.