【摘要】：2006年,為了推動(dòng)校園網(wǎng)絡(luò)創(chuàng)新,斯坦福大學(xué)首次提出了OpenFlow的概念�；谄渚W(wǎng)絡(luò)可編程的特性,SDN概念應(yīng)運(yùn)而生。傳統(tǒng)網(wǎng)絡(luò)中,如果業(yè)務(wù)需求發(fā)生改變,需要重新配置網(wǎng)絡(luò)設(shè)備,更新維護(hù)成本較高。SDN相較于傳統(tǒng)網(wǎng)絡(luò),真正從物理上實(shí)現(xiàn)了控制平面與數(shù)據(jù)平面分離,網(wǎng)絡(luò)由控制層集中管理,無(wú)需依賴(lài)底層的網(wǎng)絡(luò)設(shè)備,更加適用于瞬息萬(wàn)變的互聯(lián)網(wǎng)業(yè)務(wù)環(huán)境。近年來(lái),越來(lái)越多研究機(jī)構(gòu)向SDN領(lǐng)域投入大量科研力量。目前,SDN轉(zhuǎn)發(fā)層已經(jīng)有許多優(yōu)秀技術(shù),幫助用戶(hù)搭建底層網(wǎng)絡(luò)。然而還沒(méi)有一個(gè)網(wǎng)絡(luò)實(shí)驗(yàn)平臺(tái)能夠創(chuàng)建同時(shí)滿(mǎn)足規(guī)模性和真實(shí)性要求的轉(zhuǎn)發(fā)層網(wǎng)絡(luò)。針對(duì)這個(gè)背景,本論文結(jié)合Mininet和Openvswitch兩種開(kāi)源技術(shù)的優(yōu)點(diǎn),設(shè)計(jì)了一個(gè)虛實(shí)結(jié)合的虛擬網(wǎng)絡(luò)實(shí)驗(yàn)平臺(tái),為SDN領(lǐng)域研究者提供一個(gè)友好的實(shí)驗(yàn)環(huán)境。本文設(shè)計(jì)與實(shí)現(xiàn)的網(wǎng)絡(luò)實(shí)驗(yàn)平臺(tái)目標(biāo)是幫助用戶(hù),便捷地創(chuàng)建一個(gè)大規(guī)模且真實(shí)性高的SDN轉(zhuǎn)發(fā)層網(wǎng)絡(luò)。相較于Mininet仿真平臺(tái),本實(shí)驗(yàn)平臺(tái)能夠有效解決Mininet上帶寬和CPU資源的限制,用戶(hù)可以在獨(dú)立的Openvswitch交換機(jī)上運(yùn)行程序、監(jiān)聽(tīng)網(wǎng)絡(luò)流量等。相較于Openvswitch交換機(jī),本平臺(tái)方便用戶(hù)擴(kuò)大網(wǎng)絡(luò)規(guī)模,切換拓?fù)浣Y(jié)構(gòu)時(shí)不需要重新安裝Openvswitch交換機(jī)。綜上,本實(shí)驗(yàn)平臺(tái)能夠根據(jù)用戶(hù)需求,靈活模擬各種網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu),生成同時(shí)滿(mǎn)足規(guī)模性和真實(shí)性要求的SDN轉(zhuǎn)發(fā)層網(wǎng)絡(luò)。為了實(shí)現(xiàn)實(shí)驗(yàn)平臺(tái),本文首先調(diào)研了相關(guān)技術(shù),明確了系統(tǒng)的技術(shù)可行性。然后進(jìn)行系統(tǒng)需求分析,梳理實(shí)驗(yàn)平臺(tái)的功能性需求和非功能性需求。為了實(shí)現(xiàn)拓?fù)鋭澐趾屯負(fù)湎掳l(fā)兩個(gè)核心功能,本文基于節(jié)點(diǎn)介數(shù)分析和重疊社區(qū)發(fā)現(xiàn),提出了兩種真實(shí)節(jié)點(diǎn)定位方法。同時(shí),通過(guò)VxLan隧道技術(shù),解決了虛實(shí)交換機(jī)間鏈路搭建問(wèn)題。然后,完成實(shí)驗(yàn)平臺(tái)的總體設(shè)計(jì)和編碼工作,實(shí)現(xiàn)各模塊功能和核心工作流程,并進(jìn)行測(cè)試分析。最后,對(duì)論文進(jìn)行總結(jié),并為本網(wǎng)絡(luò)實(shí)驗(yàn)平臺(tái)提出了未來(lái)的研究方向。
[Abstract]:In 2006, in order to promote campus network innovation, Stanford University put forward the concept of OpenFlow for the first time. Based on its network programmable characteristics, the concept of SDN emerges as the times require. In the traditional network, if the service requirements change, it is necessary to reconfigure the network equipment and update and maintain the cost. Compared with the traditional network, SDN really realizes the separation of the control plane and the data plane physically. The network is managed centrally by the control layer and does not need to rely on the underlying network equipment. SDN is more suitable for the rapidly changing Internet business environment. In recent years, more and more research institutions have invested a lot of scientific research force in the field of SDN. At present, the SDN forwarding layer has many excellent technologies to help users build the underlying network. However, no network experimental platform can create a forwarding layer network that meets the requirements of scale and authenticity at the same time. In view of this background, combining the advantages of Mininet and Openvswitch open source technology, this paper designs a virtual network experimental platform which combines virtual and real, which provides a friendly experimental environment for researchers in the field of SDN. The goal of the network experiment platform designed and implemented in this paper is to help users to create a large-scale and high-authenticity SDN forwarding layer network conveniently. Compared with Mininet simulation platform, this experimental platform can effectively solve the limitation of bandwidth and CPU resources on Mininet. Users can run programs on independent Openvswitch switches, monitor network traffic and so on. Compared with Openvswitch switch, this platform is convenient for users to expand the network scale, and it is not necessary to reinstall Openvswitch switch when switching topology. In summary, the experimental platform can flexibly simulate various network topologies according to the needs of users, and generate SDN forwarding layer networks that meet the requirements of scale and authenticity at the same time. In order to realize the experimental platform, this paper first investigates the related technologies and clarifies the technical feasibility of the system. Then the system requirements are analyzed, and the functional and non-functional requirements of the experimental platform are combed. In order to realize the two core functions of topology partition and topology transmission, this paper proposes two real node location methods based on node intermediary analysis and overlapping community discovery. At the same time, the problem of link construction between virtual and real switches is solved by VxLan tunnel technology. Then, the overall design and coding of the experimental platform are completed, and the functions and core workflow of each module are realized, and the test and analysis are carried out. Finally, the paper is summarized, and the future research direction of the network experimental platform is put forward.
【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】：2017
【分類(lèi)號(hào)】：TP393.02

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