基于分布式SDN控制器的光网络生存性研究

特种光通信网络向软件定义网络(SDN)演进是必然的趋势,安全性、可靠性要求高,中心节点(控制器)是薄弱环节,网络生存性是核心指标。逻辑集中、物理分布的多控制器体系架构符合这种要求。本文描述了分布式SDN控制平面的架构,它使用多个物理分布、逻辑集中的控制器共同管理整个网络,并重点讨论了涉及控制器生存性的重要问题之一:控制器故障的转移机制。

The evolution of special optical communication networks to software defined networks(SDN)is an inevitable trend,high security and reliability requirements are required,the central node(controller)is the weak link,and network survivability is the core indicator.A logically centralized,physically distributed multi-controller architecture meets this requirement.This paper describes the architecture of a distributed SDN control plane,which uses multiple physically distributed,logically centralized controllers to collectively manage the entire network.It focuses on one of the important issues which involve controller survivability:controller failover mechanism.