【摘要】：隨著網(wǎng)絡(luò)規(guī)模的不斷擴(kuò)大,網(wǎng)絡(luò)業(yè)務(wù)呈現(xiàn)出種類多樣化,數(shù)量巨大化的趨勢(shì)。為了適應(yīng)網(wǎng)絡(luò)的發(fā)展和業(yè)務(wù)的需求,未來(lái)網(wǎng)絡(luò)必須是能夠滿足全業(yè)務(wù),高帶寬和靈活自適應(yīng)性的要求。在此背景下,采用集中式控制的SDN (Software Defined Networking)技術(shù)應(yīng)運(yùn)而生。 SDN網(wǎng)絡(luò)將控制和傳輸相分離,屏蔽了由底層多種交換設(shè)備接口不開(kāi)放而產(chǎn)生的障礙。應(yīng)用層無(wú)需了解底層的設(shè)備情況,可以通過(guò)標(biāo)準(zhǔn)的網(wǎng)絡(luò)接口根據(jù)自身需求動(dòng)態(tài)修改添加策略,實(shí)現(xiàn)業(yè)務(wù)的定制化。 本論文重點(diǎn)研究了利用OpenFlow協(xié)議對(duì)SDN架構(gòu)下的異構(gòu)網(wǎng)絡(luò)進(jìn)行統(tǒng)一控制,在與之相關(guān)的三個(gè)方向上完成了以下工作和創(chuàng)新： 第一,針對(duì)現(xiàn)網(wǎng)中ASON/GMPLS網(wǎng)絡(luò)側(cè)重于針對(duì)連接建拆處理的控制,不適應(yīng)未來(lái)網(wǎng)絡(luò)控制平面智能面向業(yè)務(wù)處理發(fā)展的問(wèn)題,提出了一種采用OpenFlow光擴(kuò)展的SDN集中式控制架構(gòu),利用多Controller協(xié)作實(shí)現(xiàn)底層異構(gòu)網(wǎng)絡(luò)設(shè)備間組網(wǎng)的統(tǒng)一控制機(jī)制。本課題參與完成NOX和Switch模塊設(shè)計(jì)以及實(shí)驗(yàn)平臺(tái)搭建的工作,實(shí)現(xiàn)了不同交換設(shè)備與同一控制平面的互聯(lián)互通,全網(wǎng)資源的統(tǒng)一調(diào)度,動(dòng)態(tài)帶寬調(diào)節(jié)和Bypass策略添加等功能。 第二,為了實(shí)現(xiàn)網(wǎng)絡(luò)資源最優(yōu)化規(guī)劃,在IP over WDM網(wǎng)絡(luò)中提出了一種面向SDN集中控制方式下的新型跨層業(yè)務(wù)流量疏導(dǎo)策略。仿真結(jié)果表明,相較于傳統(tǒng)基于分布式的Bypass流量疏導(dǎo)方法,該策略可以在綜合全網(wǎng)資源的前提下,對(duì)不同粒度的業(yè)務(wù)分別進(jìn)行疏導(dǎo),明顯提高了資源利用率,同時(shí)也能夠有效降低業(yè)務(wù)能耗。 第三,針對(duì)SDN網(wǎng)絡(luò)集中式控制架構(gòu)中控制器易受攻擊,且控制器癱瘓后對(duì)網(wǎng)絡(luò)影響巨大的問(wèn)題,提出了一種SDN網(wǎng)絡(luò)控制器的動(dòng)態(tài)部署實(shí)現(xiàn)方案。該方案將控制器與交換設(shè)備相耦合,設(shè)計(jì)了一種扁平化的SDN網(wǎng)絡(luò)。這可以降低網(wǎng)絡(luò)對(duì)于單一控制器的依賴,實(shí)現(xiàn)控制器失效后網(wǎng)絡(luò)的快速恢復(fù),提高網(wǎng)絡(luò)可靠性。
[Abstract]:With the continuous expansion of network scale, network services show a trend of diversification and quantity. In order to meet the needs of network development and service, the future network must be able to meet the requirements of full service, high bandwidth and flexibility. In this context, SDN (Software Defined Networking) technology with centralized control emerges as the times require. The SDN network separates control from transmission and shields the obstacles caused by the closed interfaces of various switching devices at the bottom. The application layer does not need to know the situation of the underlying equipment and can dynamically modify the addition strategy according to its own requirements through the standard network interface to realize the customization of the service. This paper focuses on the unified control of heterogeneous networks under SDN architecture by using OpenFlow protocol, and completes the following work and innovations in three related directions: first, In view of the problem that the ASON/GMPLS network in the present network is focused on the control of connection construction and disassembly processing, which is not suitable for the future network control plane intelligence oriented service processing development, a centralized control architecture of SDN using OpenFlow optical expansion is proposed. The unified control mechanism of networking among the underlying heterogeneous network devices is realized by using multiple Controller collaboration. This project is involved in the design of NOX and Switch modules and the construction of experimental platform. It realizes the interconnection of different switching devices and the same control plane, the unified scheduling of the whole network resources, the dynamic bandwidth adjustment and the Bypass policy addition. Secondly, in order to realize the optimal planning of network resources, a novel cross-layer traffic grooming strategy for SDN centralized control is proposed in IP over WDM networks. The simulation results show that compared with the traditional Bypass traffic grooming method based on distributed network, this strategy can channel different granularity services under the premise of synthesizing the whole network resources, and improves the resource utilization rate obviously. At the same time, it can also effectively reduce business energy consumption. Thirdly, aiming at the problem that the controller is vulnerable to attack in the centralized control architecture of SDN network, and the controller is paralyzed, a dynamic deployment scheme of SDN network controller is proposed. The controller is coupled with the switching equipment and a flat SDN network is designed. This can reduce the dependence of the network on a single controller, realize the rapid recovery of the network after the failure of the controller, and improve the reliability of the network.
【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
【分類號(hào)】：TP393.02

【參考文獻(xiàn)】

相關(guān)期刊論文 前1條

1 郭春梅;張如輝;畢學(xué)堯;;SDN網(wǎng)絡(luò)技術(shù)及其安全性研究[J];信息網(wǎng)絡(luò)安全;2012年08期

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本文編號(hào)：2238448