OpenFlow
计算机科学
可扩展性
分布式计算
计算机网络
负载平衡(电力)
流程布线
混合路由
软件定义的网络
先开最短路径
试验台
布线(电子设计自动化)
架空(工程)
控制器(灌溉)
路由表
路由协议
链路状态路由协议
工程类
网格
操作系统
几何学
岩土工程
生物
数据库
数学
农学
作者
Zehua Guo,Songshi Dou,Wang Yi,Sen Liu,Wendi Feng,Yang Xu
标识
DOI:10.1109/tcomm.2021.3074500
摘要
The scalability issue hinders the deployment of Software-Defined Networking (SDN) in the Wide Area Networks (WANs). Existing solutions have two issues: (1) network performance relies on complicated controller synchronization, which increases the complexity of network control; (2) fine-grained flow processing enables flexible flow control at the cost of high processing load on the controllers and high flow table occupancy on switches. In this paper, we propose a scalable routing solution named HybridFlow, which achieves a good load balancing performance using a single controller with low control overhead (i.e., flow routing and rerouting overhead). HybridFlow mainly employs two techniques: hybrid routing and crucial flow rerouting. Hybrid routing enabled by commercial SDN switches gives us opportunities to reduce the processing load of the controller by routing flows with the hybrid OpenFlow/OSPF mode. Thus, the majority of flows can be routed by OSPF without involving the controller. Crucial flow rerouting realizes load balancing by dynamically identifying crucial flows based on a new metric called Variation Slope and rerouting these flows with the hybrid OpenFlow/OSPF mode. The simulation based on the real traffic traces and network typologies shows that compared with the optimal solution, HybridFlow can achieve 87% of the optimal load balancing performance by rerouting 36% less flows on average.
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