FRACTAL: A framework for recursive abstraction of SDN control-plane for large-scale production networks

摘要: Software-defined networking (SDN) renovates traditional systems by replacing a distributed, per-switch control plane with (logically) centralized one. To design scalable, highly available SDN plane, it is inevitable to disseminate the network state multiple instances horizontally using measures like replication and partitioning. However, some recent studies reported that not sufficient cover large scale in purely horizontal manner. In this paper, we propose FRACTAL, framework for recursive abstraction of control-plane, address problem. divided into small networks, each which abstracted as single virtual switch. This “divide-and-abstract” process recursively iterated until can be handled controller. A switch controlled higher level controller over OpenFlow, so FRACTAL coexist other mechanisms.