The Remote Authentication Dial-In User Service (RADIUS) probe can be used to evaluate the RADIUS attributes received from the network access device (NAD). Of primary relevance is the building of the MAC to IP address bindings. In RADIUS access-requests, the Calling-Station-ID field specifies the endpoint's MAC address and the Framed-IP-Address field specifies the endpoint's IP address. The RADIUS probe also enables access to the IOS Device Sensor data on devices that support the feature.
The HTTP probe does not gather data from the Cisco IOS Device Sensor feature. The HTTP Probe enables the profiler to capture the information provided by the web browser in the HTTP User-Agent field, as well as other HTTP attributes from the request messages. The User-Agent field typically identifies the browser, software vendor, operating system, and version information to the web server.
The DHCP probe does not gather data from the Cisco IOS Device Sensor feature. The DHCP probe allows the Cisco Identity Services Engine (ISE) profiling service to collect DHCP request attributes from the DHCP client. DHCP requests carry a User-Agent field that helps specify the OS of the device. Information such as the requested DHCP options and the DHCP hostname can be useful in classifying a device.
The Network Scan (NMAP) probe does not gather data from the Cisco IOS Device Sensor feature. NMAP is integrated with the Cisco Identity Services Engine (ISE) profiler to augment its profiling capability for better endpoint classification, particularly mobile devices. You can perform a manual subnet scan on a specific subnet by using the NMAP probe, or you can associate a network scan action to a profiler policy to perform a dynamic scan on an endpoint. The NMAP probe requires the IP to MAC address binding to be provided by a different probe.