Which LISP device receives packets from remote-site-facing devices and either decapsulates LISP packets or routes them natively?

An Egress Tunnel Router (ETR) is a LISP device that receives LISP-encapsulated packets from other LISP devices (specifically Ingress Tunnel Routers, ITRs). Its primary function is to decapsulate these LISP packets and then forward the inner IP packet to its final destination within the local site. It can also route native IP packets if the destination is not a LISP endpoint. An ITR (Ingress Tunnel Router) encapsulates native IP packets into LISP packets. An MS (Map Server) stores Endpoint ID (EID) to Routing Locator (RLOC) mappings. An MR (Map Resolver) receives EID-to-RLOC lookup requests and forwards them to the appropriate Map Server.