There are five basic device roles in the fabric overlay: + Control plane node: This node contains the settings, protocols, and mapping tables to provide the endpoint-to-location (EID-to-RLOC) mapping system for the fabric overlay. + Fabric border node: This fabric device (for example, core layer device) connects external Layer 3 networks to the SDA fabric. + Fabric edge node: This fabric device (for example, access or distribution layer device) connects wired endpoints to the SDA fabric. + Fabric WLAN controller (WLC): This fabric device connects APs and wireless endpoints to the SDA fabric. + Intermediate nodes: These are intermediate routers or extended switches that do not provide any sort of SD-Access fabric role other than underlay services.