基于SDN的互联网域间路由研究

互联网流量的爆发式增长,叠加互联网流量固有的突发性特点,使得网络流量不均衡现象日益加剧。传统BGP协议由于缺乏全网拓扑和全局流量观,只能遵循标准BGP选路原则,在解决流量调度和负载均衡方面存在不足。针对BGP协议存在的局限性,研发了基于RR+的互联网骨干网流量调度系统,并应用于ChinaNet骨干网的网内中继、网间互联出口、IDC出口等多个流量优化场景。更进一步地,提出了一种基于SDN的互联网域间路由架构,通过在域间控制器之间交换BGP路由,无需在域内和域间运行BGP协议,极大地简化了网络协议,并能够实现灵活的流量调度和负载均衡。

Research on Inter-Domain Routing based on SDN

The explosive growth of Internet traffic and the inherent burst characteristics of Internet traffic make the imbalance of network traffic more and more serious.Due to the lack of the whole network topology and the view of global traffic,the traditional BGP protocol can only follow the standard BGP routing principle,which has some shortcomings in solving the traffic scheduling and load balancing.In view of the limitations of BGP protocol,a RR+based traffic scheduling system for Internet backbone network is developed and applied to multiple traffic optimization scenarios in ChinaNet backbone networks,such as intra-network relay,inter-network interconnection exit,IDC exit,etc.Furthermore,an inter-domain routing architecture based on SDN is proposed.By exchanging BGP routes between inter-domain SDN controllers,there is no need to run BGP protocols within and between domains,which greatly simplifies the network protocol and achieves flexible traffic scheduling and load balancing.