Abstract—In Low-Power and Lossy Networks (LLNs), significant challenges arise due to the severe constraints on energy, memory, and processing capacities. These limitations hinder the efficiency of routing protocols like Routing Protocol for Low-Power and Lossy Networks (RPL), particularly in dynamic network topologies where frequent changes occur. We propose an innovative architecture integrating Software Defined Networking (SDN) and Network Function Virtualization (NFV) with RPL protocol to address this issue. SDN and NFV technologies introduce greater flexibility, programmability, and centralized control, enabling the network to adapt more effectively to dynamic changes. Our proposed Software Defined architecture for Low-Power and Lossy Network (SD-LLN) leverages these technologies to enhance RPL’s adaptability and resilience in varying network conditions. We improve network performance by integrating SDN/NFV with RPL, particularly in routing efficiency, stability, and resource optimization. Compared to traditional RPL implementations, our approach demonstrates significant advantages in providing an efficient and dynamic solution for managing dynamic LLNs. The results highlight the potential of this method in managing LLNs, offering a robust framework to effectively overcome dynamic, resource-constrained environments.