Achieving Consistence for Cross-Domain WAN Control in Software-Defined Networks  

作　　者：ZHOU Boyang WU Chunming GAO Wen HONG Xiaoyan JIANG Ming CHEN Shuangxi 

机构地区：[1]College of Computer Science,Zhejiang University [2]Department of Computer Science,University of Alabama [3]Institute of Software and Intelligent Technology,Hangzhou Dianzi University [4]Division of Information Technology,Jiaxing Vocational Technical College

出　　处：《China Communications》2015年第10期136-146,共11页中国通信（英文版）

基　　金：supported by the National Basic Research Program of China (2012CB315903);the Program for Key Science and Technology Innovation Team of Zhejiang Province(2011R50010,2013TD20);the National High Technology Research Program of China(2015AA016103);the National Natural Science Foundation of China(61379118);the Research Fund of ZTE Corporation;Jiaxing Science and Technology Project (No.2014AY21021)

摘　　要：When applying Software-Defined Networks(SDN) to WANs,the SDN flexibility enables the cross-domain control to achieve a better control scalability.However,the control consistence is required by all the cross-domain services,to ensure the data plane configured in consensus for different domains.Such consistence process is complicated by potential failure and errors of WANs.In this paper,we propose a consistence layer to actively and passively snapshot the cross-domain control states,to reduce the complexities of service realizations.We implement the layer and evaluate performance in the PlanetLab testbed for the WAN emulation.The testbed conditions are extremely enlarged comparing to the real network.The results show its scalability,reliability and responsiveness in dealing with the control dynamics.In the normalized results,the active and passive snapshots are executed with the mean times of 1.873 s and 105 ms in135 controllers,indicating its readiness to be used in the real network.When applying Software-Defined Networks（SDN） to WANs,the SDN flexibility enables the cross-domain control to achieve a better control scalability.However,the control consistence is required by all the cross-domain services,to ensure the data plane configured in consensus for different domains.Such consistence process is complicated by potential failure and errors of WANs.In this paper,we propose a consistence layer to actively and passively snapshot the cross-domain control states,to reduce the complexities of service realizations.We implement the layer and evaluate performance in the PlanetLab testbed for the WAN emulation.The testbed conditions are extremely enlarged comparing to the real network.The results show its scalability,reliability and responsiveness in dealing with the control dynamics.In the normalized results,the active and passive snapshots are executed with the mean times of 1.873 s and 105 ms in135 controllers,indicating its readiness to be used in the real network.

关 键 词：software-defined networking distributed control plane cross-domain control 

分 类 号：TP393.2[自动化与计算机技术—计算机应用技术] TP311.52[自动化与计算机技术—计算机科学与技术]