Methods and systems for managing traffic among a plurality of interconnected sites. The sites are interconnected via ring members and ring segments of a logical ring implemented by a network controller over a physical transport network. When it is determined there is a change in traffic that requires a change in ring topology, topology optimization is performed to accommodate the change in traffic. The topology optimization may include: dynamically increasing capacity of a ring segment, dynamically decreasing capacity of a ring segment, dynamically creating a traffic path, and/or dynamically removing a traffic path.