OVS的编程扩展技术.pdf

OVS的编程扩展技术 杨帆，晏思宇，黄韬 (北京邮电大学，北京100876) 摘要：OVS(openvSwitch)作为一款开源的SDN软件交换机，得到了广泛关注。但在复杂多变的网络环 境下，易出现数据层失去控制器控制和流表项学习老化等故障问题，严重制约了SDN性能。针对以上问题， 研究设计了OVS的编程扩展技术架构，包含链接状态处理、故障感知、二三层自学习转发等核心功能的扩展， 使OVS实现自动快速恢复、流表表项及时更新，保障了SDN吞吐量，从而减小了控制器失联对通信的影响， 增强了SDN的稳定性和可靠性。 关键词：OVS；SDN；OpenFlow；软件交换机 中图分类号：TP393．4 文献标识码：A doi：10．11959／j．issn．1000—0801．2017094 extention of vSwitch Programming technologyopen YANG Tao Fan，YANSiyu，HUANG ofPostsand BeijingUniversity 100876，China Telecommunications，Beijing Abstract：Asan sourceSDNsoftware been concerned．Butin open switch，openvSwitch(ovs)haswidespread and network losescontrolofcontrollerandflowtable environment，data complexchangeable layer entrylearning andthe ofSDNis solvethe agingappearseasily performanceseriouslyhampered．Toproblems，theprogramming extension architectureofOVSwas linkstate technology designed，includingprocessing，faultperception，two three—tier andother ofcore thatOVScouldrecoverautomaticand self-learningforwarding expansionfunctions，SO tableentriescould in ofSDNwas theinfluenceofcontrol- rapidly,flow updatetime，throughputguaranteed，thereby lerlosscontrolforcommunicationwas and wasenhanced． reduced，SDNstabilityreliability defined switch Keywords：openvSwitch，softwarenetworking，OpenFlow,sofware