【摘要】：軟件定義網(wǎng)絡(luò)(SDN)是一種新型的網(wǎng)絡(luò)架構(gòu),它的設(shè)計(jì)理念是將網(wǎng)絡(luò)的控制平面與數(shù)據(jù)轉(zhuǎn)發(fā)平面進(jìn)行分離,并實(shí)現(xiàn)可編程化控制。隨著SDN的概念越來(lái)越流行、以及SDN的優(yōu)勢(shì)日益凸顯,SDN網(wǎng)絡(luò)取代傳統(tǒng)網(wǎng)絡(luò)將成為必然之勢(shì)。然而對(duì)傳統(tǒng)網(wǎng)絡(luò)的替代,并不是一蹴而就的事情。在很長(zhǎng)的時(shí)間內(nèi),SDN網(wǎng)絡(luò)不可能完全替換傳統(tǒng)網(wǎng)絡(luò)。于是,SDN網(wǎng)絡(luò)在將來(lái)將會(huì)出現(xiàn)分階段逐步部署的情況,即在部署SDN網(wǎng)絡(luò)的過(guò)程中,將會(huì)面臨OpenFlow設(shè)備與傳統(tǒng)網(wǎng)絡(luò)設(shè)備并存、互通等問(wèn)題。因此對(duì)SDN路由服務(wù)的研究具有著非常重大的意義。 本文首先對(duì)SDN概念的起源和發(fā)展做出了詳細(xì)的介紹。同時(shí)也對(duì)OpenFlow相關(guān)技術(shù)進(jìn)行了仔細(xì)的調(diào)研,包括對(duì)OpenFlow控制器、OpenFlow交換機(jī)以及OpenFlow協(xié)議規(guī)范的研究與學(xué)習(xí)。其中重點(diǎn)介紹了OpenFlow協(xié)議規(guī)范的最新實(shí)現(xiàn)版本OF v1.3,詳細(xì)分析了相比于之前版本的改動(dòng)。之后介紹了一些現(xiàn)有在SDN網(wǎng)絡(luò)中提供路由服務(wù)的研究,其中對(duì)采用多路由引擎方式的RouteFlow解決方案進(jìn)行了詳細(xì)的分析與研究,然后根據(jù)當(dāng)前解決方案中的一些不足提出需求。接著對(duì)基于OpenFlow v1.3的多引擎路由組件進(jìn)行設(shè)計(jì),對(duì)路由系統(tǒng)進(jìn)行搭建,分析了其工作原理、流程和各個(gè)模塊的功能,重點(diǎn)對(duì)基于OpenFlow v1.3的NOX平臺(tái)上的路由組件進(jìn)行了實(shí)現(xiàn)。接下來(lái)針對(duì)當(dāng)前RouteFlow實(shí)現(xiàn)中的一些其他不足之處,提出了解決方案。最后對(duì)在SDN網(wǎng)絡(luò)取代傳統(tǒng)網(wǎng)絡(luò)的進(jìn)程中可能會(huì)遇到的場(chǎng)景進(jìn)行抽象與模擬,在搭建新建OpenFlow網(wǎng)絡(luò)和混合組網(wǎng)這兩種模擬場(chǎng)景之后,對(duì)基于OpenFlowv1.3的多引擎路由系統(tǒng)進(jìn)行了詳盡的驗(yàn)證。
[Abstract]:Software defined network (SDN) is a new network architecture. Its design idea is to separate the control plane of the network from the data forwarding plane, and to realize programmable control. With the concept of SDN becoming more and more popular and the advantages of SDN becoming more and more prominent, it will become inevitable that SDN network will replace the traditional network. However, the replacement of the traditional network is not achieved overnight. For a long time, SDN network can not completely replace the traditional network. Therefore, in the future, SDN network will be deployed step by step, that is, in the process of deploying SDN network, it will face the problems of coexistence and interworking between OpenFlow equipment and traditional network equipment. Therefore, the research on SDN routing services is of great significance. In this paper, the origin and development of SDN concept are introduced in detail. At the same time, the related technologies of OpenFlow are also investigated carefully, including the research and study of OpenFlow controller, OpenFlow switch and OpenFlow protocol specification. The latest implementation version of OpenFlow protocol specification, OF v1.3, is introduced in detail, and the changes compared with the previous version are analyzed in detail. After that, this paper introduces some existing research on providing routing services in SDN network, in which the RouteFlow solution based on multi-routing engine is analyzed and studied in detail, and then the requirements are put forward according to some shortcomings of the current solution. Then the multi-engine routing component based on OpenFlow v1.3 is designed, the routing system is built, its working principle, flow and the functions of each module are analyzed, and the routing components on NOX platform based on OpenFlow v1.3 are implemented. Then, aiming at some other shortcomings of the current RouteFlow implementation, a solution is proposed. Finally, the scenarios that may be encountered in the process of replacing the traditional network with SDN network are abstracted and simulated. After building two simulation scenarios: new OpenFlow network and hybrid networking, The multi-engine routing system based on OpenFlowv1.3 is verified in detail.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TP311.52

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