Much like the wired NADs, the first procedure in configuring the WLC is to add the ISE policy service nodes (PSNs) to the WLC as RADIUS authentication and accounting servers. This is a configuration that affects the entire WLC as a system, similar to the global configuration with a switch.
The WLC separates the AAA server configuration into two sections. The authentication servers are configured in a separate section from the accounting servers. Start by adding the ISE PSN to the authentication servers. From the WLC GUI, do the following:
Step 1. Navigate to Security > RADIUS > Authentication.
You need to ensure that the endpoint’s MAC address is populated in the RADIUS