How are wireless endpoints registered in the HTDB in a Cisco SD-Access architecture?

Fabric edge nodes handle wired endpoint registration and traffic, while CAPPWAP messaging is between the AP and WLC, not directly used by edge nodes to update the HTDB for wireless clients.

When a new wireless client connects to an Access Point within the SD-Access fabric, the Fabric WLC learns of this client and registers its Host Identity (EID) and location (RLOC) in the HTDB, making the endpoint discoverable and routable within the fabric.

Border nodes manage routing between the fabric and external networks and do not initiate the registration of new wireless endpoints in the HTDB; this is a function of the device directly connecting the endpoint.

Fabric APs forward client traffic and communicate with the WLC but do not directly update the HTDB; the WLC performs this control plane function for wireless client registration.