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Implementing and Operating Cisco Enterprise Network Core Technologies (ENCOR) · Cisco
Select one answer.
Written by other learners. Comments can disagree with the marked answer — check the official documentation when in doubt.
The correct answer is: D. MS (Map Server) Explanation: In LISP, the Map Server is the device that receives EID-to-RLOC mapping registrations from ETRs and publishes them into the mapping database for other LISP devices to use. ETR (Egress Tunnel Router) → Registers its EID-to-RLOC mappings with the Map Server. MR (Map Resolver) → Handles map requests from ITRs and queries the mapping database. ITR (Ingress Tunnel Router) → Sends traffic to RLOCs based on mapping information. MS (Map Server) → Publishes and maintains EID-to-RLOC mappings. So for "responsible for publishing" — Map Server is the answer.
Answer is A. The ETR is the only device that publishes EID-to-RLOC mappings for a site. It publishes mappings to the Map Server. The MS Map-Server (MS) does not publish EID-to-RLOC mappings. Instead, it plays a passive, registrar-like role in the LISP architecture.
Map-Server: A network infrastructure component that learns of EID-Prefix mapping entries from an ETR, via the registration mechanism described below, or some other authoritative source if one exists. A Map-Server publishes these EID-Prefixes in a mapping database. https://datatracker.ietf.org/doc/html/rfc6833