A service provider hires you to design its new managed CE offering to meet these requirements: - The CEs cannot run a routing protocol with the PE - Provide the ability for equal or unequal ingress lo

DMVPN requires a dynamic routing protocol such as EIGRP or OSPF between spoke CEs and the hub PE, violating the no-routing-protocol requirement, and its management overhead does not scale to 250,000 CE devices.

Point-to-point GRE requires a manually provisioned tunnel for every CE-PE pair, making it operationally impossible to scale to 250,000 devices and creating high management burden.

FlexVPN relies on IKEv2 and typically requires PKI or complex pre-shared key management, increasing CE platform requirements and operational complexity, which conflicts with the low-end hardware and low management goals.

LISP separates the Endpoint Identifier (EID) from the Routing Locator (RLOC), allowing CE devices to be reachable without running any dynamic routing protocol with the PE, which directly satisfies that constraint. LISP natively supports IPv6 EIDs and RLOCs, provides equal and unequal load balancing through multiple RLOCs per EID, scales to millions of endpoints via a distributed mapping system, and imposes minimal configuration on low-end CE platforms that only need basic IP forwarding.