Summary: SDN innovation has been primarily focused on the data center where centralized network programmability has been shown to be capable of providing many benefits to the complex and dynamic (on-demand) data center environment. Service provider networks will also benefit from SDN. Traversing a service provider network involves crossing different network types, technologies, layers and administrative domains. SDN solutions, including OpenFlow’s programmatic control, will provide capabilities unique to these service provider technologies. Huawei presents an architecture that expands SDN into multiple, task specific, controllers and domains and extends networking control across all of the service provider network dimensions.
