【摘要】：軟件定義網(wǎng)絡(luò)(Software Defined Networking,SDN)作為未來網(wǎng)絡(luò)的主要研究方向,轉(zhuǎn)發(fā)與控制分離的網(wǎng)絡(luò)架構(gòu)也越來越深入人心,SDN通過集中控制可以實(shí)現(xiàn)業(yè)務(wù)的快速部署,也使得整個(gè)網(wǎng)絡(luò)資源的利用更加合理。集中式控制層面雖然帶來了可控性、安全性和合理性等優(yōu)點(diǎn),但隨著業(yè)務(wù)規(guī)模不斷的增大及應(yīng)用場景的復(fù)雜化,也產(chǎn)生了很多擴(kuò)展性、可靠性、高可用性問題。本文深入研究了 SDN控制器的可擴(kuò)展性問題,創(chuàng)造性得提出了一種控制器可擴(kuò)展方案,并對(duì)該方案下的高可用性相關(guān)問題進(jìn)行研究。首先本文詳細(xì)設(shè)計(jì)了一種SDN集群控制器高可用性架構(gòu);其次通過對(duì)所設(shè)計(jì)的高可用架構(gòu)進(jìn)行研究,并針對(duì)各層的特性,提出三種不同的故障檢測方法。針對(duì)根控制器管理系統(tǒng),主要采用了主備檢測方法;對(duì)于根控制器故障的檢測,提出了過半檢測方法;針對(duì)本地控制器的故障檢測,提出了循環(huán)檢測方法和控制器間自適應(yīng)延時(shí)算法。主要實(shí)驗(yàn)仿真結(jié)果顯示所提出方法可以快速檢測故障并且提高檢測準(zhǔn)確度。再者,本文對(duì)主控制器選舉算法進(jìn)行深入研究,并提出了一種高可用的主控制器選舉算法,實(shí)驗(yàn)仿真結(jié)果顯示所設(shè)計(jì)的算法可以有效地選舉出高可用的主控制器。
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圖片說明：圖１－１所示，Ｈｙｐｅ巧ｌｏｗＷ是一種基于ＮＯＸ的分布式控制設(shè)計(jì)方案
[Abstract]:As the main research direction of the future network, the network architecture of the separation of forwarding and control is becoming more and more popular. SDN can realize the rapid deployment of services through centralized control, and make the utilization of the whole network resources more reasonable. Although the centralized control level brings the advantages of controllability, security and rationality, with the continuous increase of business scale and the complexity of application scenarios, there are a lot of scalability, reliability and high availability problems. In this paper, the scalability of SDN controller is deeply studied, a controller extensibility scheme is proposed creatively, and the high availability related problems under this scheme are studied. Firstly, a high availability architecture of SDN cluster controller is designed in detail. Secondly, three different fault detection methods are proposed according to the characteristics of each layer by studying the designed high availability architecture. For the root controller management system, the main and standby detection method is mainly adopted; for the root controller fault detection, more than half detection method is proposed; for the local controller fault detection, the cyclic detection method and the adaptive delay algorithm between controllers are proposed. The main experimental simulation results show that the proposed method can detect faults quickly and improve the detection accuracy. Furthermore, the main controller election algorithm is deeply studied in this paper, and a highly available main controller election algorithm is proposed. The experimental simulation results show that the designed algorithm can effectively elect the highly available main controller.
【學(xué)位授予單位】：浙江工商大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TP393.02

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