Which control plane protocol is responsible for EID-to-RLOC mapping concerning SD-Access Architecture?

VXLAN (Virtual Extensible LAN) is the data plane encapsulation protocol used in SD-Access to transport traffic between fabric nodes, not a control plane protocol for EID-to-RLOC mapping.

LISP (Locator/ID Separation Protocol) is a foundational control plane component in Cisco SD-Access that decouples endpoint identity (EID) from network location (RLOC). It manages a distributed database that maps endpoint IP addresses (EIDs) to the IP addresses of the fabric edge nodes (RLOCs) where those endpoints are attached, facilitating host mobility and location independence.

GBAC (Group Based Access Control) refers to a security policy concept within SD-Access for applying access control based on endpoint groups, not a control plane protocol for address mapping.

CEF (Cisco Express Forwarding) is a high-speed, distributed IP forwarding mechanism on Cisco devices, primarily a data plane technology, and is not involved in EID-to-RLOC control plane mapping.