Which LISP infrastructure device stores registered EID prefixes in a mapping database where they are associated to RLOCs?
- map resolver
- proxy ETR
- proxy ITR
- map server
Explanation: A map server (MS) is the specific LISP infrastructure device to which Egress Tunnel Routers (ETRs) register their EID prefixes. Its primary function is to store these registered EID prefixes in a mapping database where they are associated with RLOCs. All LISP sites then utilize this mapping system to resolve EID-to-RLOC mappings for traffic forwarding.
In the context of a Cisco SD-Access fabric, this map server functionality is typically combined with map resolver (MR) duties on the control plane node, which manages the host tracking database (HTDB) to maintain these associations. In contrast, a map resolver is the device that receives queries from Ingress Tunnel Routers (ITRs) rather than storing the registrations itself.
Related exam: Modules 23 – 26: Checkpoint Exam: Software-Defined Networking Answers (CCNP ENCOR v9)
