Carrier SDN Introduction
Traditional network architectures are ill-suited to meet the requirements of today's enterprises, carriers, and end users. Thanks to a broad industry effort spearheaded by the Open Networking Foundation (ONF), Software- Defined Networking (SDN) is transforming networking architecture.
SDN is a dynamic and flexible network architecture that protects existing investments while future-proofing the network. With SDN, today's static network can evolve into an extensible service delivery platform capable of responding rapidly to changing business, end-user, and market needs.
Introducing Software-Defined Networking
Software Defined Networking (SDN) is an emerging network architecture where network control is decoupled from forwarding and is directly programmable.
With SDN, enterprises and carriers gain vendor-independent control over the entire network from a single logical point, which greatly simplifies the network design and operation. SDN also greatly simplifies the network devices themselves, since they no longer need to understand and process thousands of protocol standards but merely accept instructions from the SDN controllers.
OpenFlow currently is the only standardized SDN protocol that allows direct manipulation of the forwarding plane of network devices.
OpenFlow-based SDN architecture can integrate seamlessly with an enterprise or carrier's existing infrastructure and provide a simple migration path for those segments of the network that need SDN functionality the most.
Benefits of OpenFlow-Based Software-Defined Networks