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Authentication and Addressing

The WAP initiates the authentication and authorization request by sending a standard RADIUS Access-Request to the RADIUS relay server. The Access-Request must include the attributes listed in Table 44. The attributes uniquely identify the wireless subscriber.

Table 44: Required RADIUS Access-Request Attributes

Attribute Name	Description
Called-Station-id [30]	Subscriber’s WAP
Calling-Station-id [31]	Subscriber’s media access control (MAC) address

When the RADIUS server authenticates the subscriber, the router’s RADIUS relay server creates a RADIUS Access-Accept message and sends the message back to the subscriber. The router’s DHCP server (either the router’s DHCP local server or an external DHCP server) assigns an IP address to the subscriber and creates the subscriber interface.

For information about using the optional SRC software with the RADIUS relay server to assign IP addresses, see RADIUS Relay Server and the SRC Software .

The WAP might periodically reauthenticate a subscriber. For example, reauthentication is necessary to renegotiate a new Wired Equivalent Privacy (WEP) key. The RADIUS relay server ignores any new RADIUS attributes that are sent during a renegotiation operation.

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