In Cisco SD-Access wireless, when a client roams between APs on different access switches managed by a single WLC, which roaming method is used?

When a client roams between APs connected to different access switches within the same SD-Access fabric, the inter-xTR (Extended Node to Extended Node) roaming method is used. This is because the client's SGT (Scalable Group Tag) and VLAN are maintained across the fabric, and the mobility within the fabric is handled by the underlying VXLAN (Virtual Extensible LAN) tunnels between the fabric edge nodes (xTRs). Layer 3 roaming is typically used when a client roams between different WLCs or subnets, requiring a new IP address. Auto anchor mobility is an older WLC feature for roaming between different WLCs. Fast roam (e.g., 802.11r) is a client-side optimization for faster reassociation with an AP, not a fabric-level roaming method.