When RADIUS authentication is implemented, the device consults a RADIUS server to verify user names and passwords.
When a device is configured with a set of RADIUS servers to be used for authentication, the device also sends accounting data to the RADIUS server implicitly. When the RADIUS server is not configured to support accounting, the accounting events sent by the device to the server are dropped.
Note
The device supports the NAS-IPv6-Address attribute (RFC 3162) for RADIUS authentication.