Which action occurs during a Layer 3 roam?

During a Layer 3 roam, a client moves between access points (APs) that are on different IP subnets, meaning they are controlled by different wireless LAN controllers (WLCs) or different WLCs within the same mobility group. To maintain the client's original IP address and ongoing sessions, the client's traffic is tunneled back to its anchor WLC (the original controller it connected to). This ensures seamless connectivity. The client does not receive a new IP address (that's a Layer 2 roam scenario if the client moves to a different subnet without mobility, or if it's a new association). The client is not marked as "Foreign" on the original controller; rather, the original controller becomes the anchor. The client database entry is not "moved" but rather synchronized or referenced between controllers.