A Multi-Domain SDN Scalability Architecture Implementation Based on the Coordinate Controller

摘要

Software-defined Networking, known as SDN, is a novel architecture that decouples the control plane from the data plane, and opens a programmable network. However, it is common practice for network operators to divide the large-scale networks into multiple domains and manage the networks by using a group of controllers. Designing a scalable SDN control plane becomes a critical problem. In this paper, we propose a SDN scalability architecture for multi-domain, multi-vendor networking. We design and implement the Coordinator Controller to enable different SDN administrative domains to cooperate by unifying the northbound APIs of the controllers which are working for different SDN domains. To validate the proposed architecture, we build a multi-domain experiment environment consisting of three vendors. The results show great ability in the network state view consistency and end-to-end provisioning services.