Software defined network
SDN is main remote controller for Control Plane. This remote controller manages Routing Table. SDN separate device’s Control Plane and Data Plane by logically centralized controller and configuration management. Traditional router play role of data plane and SDN play role of control plane. Monolithic Architecture for centralized routing implementation.
Current challenge is scaling beyond a single AS by hardening the control plane. SDN mostly focuses on routing but future feature’s candidates are SDN-computed congestion control and virtualization features.
SDN Notion