本文選題：SDN　切入點：OpenFlow　出處：《北京郵電大學(xué)》2014年碩士論文

【摘要】：隨著網(wǎng)絡(luò)互聯(lián)技術(shù)的不斷革新,傳統(tǒng)的TCP/IP網(wǎng)絡(luò)向著更加高速、開放、智能的方向發(fā)展,各種新的網(wǎng)絡(luò)技術(shù)和協(xié)議不斷出現(xiàn)�；诒M力而為的傳輸理念在承載新業(yè)務(wù)時面臨了許多挑戰(zhàn),在擴展性,安全性,虛擬化,QoS等方面的問題層出不窮。研究者們開始著手設(shè)計一種新的構(gòu)架來解決這些問題,軟件定義網(wǎng)絡(luò)SDN(Software-Defined Networking)由于其開放的網(wǎng)絡(luò)構(gòu)架,可編程性、集中控制、資源虛擬化等優(yōu)勢得到了學(xué)術(shù)界和企業(yè)界的廣泛關(guān)注。 單純的SDN構(gòu)架模型相對簡單,如何有效的利用SDN的優(yōu)勢來實現(xiàn)業(yè)務(wù)需求是人們關(guān)注的焦點。本文面向未來網(wǎng)絡(luò)的服務(wù)感知和數(shù)據(jù)感知的目標(biāo)進(jìn)行SDN組網(wǎng)技術(shù)研究。首先分析了SDN網(wǎng)絡(luò)的構(gòu)架,OpenFlow協(xié)議以及SDN網(wǎng)絡(luò)設(shè)備的特點,并且調(diào)研了目前SDN在企業(yè)網(wǎng),校園網(wǎng),無線接入網(wǎng),數(shù)據(jù)中心等方面的典型組網(wǎng)方案。SDN作為一種未來網(wǎng)絡(luò)構(gòu)架,對組網(wǎng)技術(shù)的研究既要考慮實現(xiàn)傳統(tǒng)的網(wǎng)絡(luò)業(yè)務(wù)需求,又要充分利用SDN的可編程特點考慮如何承載未來網(wǎng)絡(luò)應(yīng)用如信息為中心網(wǎng)絡(luò)ICN(Information-Centric Network)業(yè)務(wù)。本文結(jié)合具體應(yīng)用,討論了兩種組網(wǎng)應(yīng)用模型。(1)針對現(xiàn)有組播網(wǎng)絡(luò)的不可控和用戶接入的任意性,提出基于SDN的安全組播組網(wǎng)模型,在該機制中不需要網(wǎng)絡(luò)轉(zhuǎn)發(fā)節(jié)點維護復(fù)雜的組播路由協(xié)議,由SDN控制器根據(jù)全局的拓?fù)鋪碡?fù)責(zé)建立組播樹,管理組播組,對用戶的IGMP請求進(jìn)行鑒權(quán),設(shè)計了組播控制器并且基于開源的NOX編程實現(xiàn)。(2)分析了信息為中心網(wǎng)絡(luò)(ICN)的關(guān)鍵技術(shù),提出了基于SDN實現(xiàn)ICN的組網(wǎng)方案。ICN網(wǎng)絡(luò)基于名字路由轉(zhuǎn)發(fā),而SDN基于流表匹配項中字段來轉(zhuǎn)發(fā)數(shù)據(jù)包,本文中提出了ICN信息對象名字與OpenFlow標(biāo)簽的映射機制,為了更好的滿足ICN對節(jié)點緩存和基于名字路由的需求,對現(xiàn)有的OpenFlow協(xié)議進(jìn)行了擴展,包括增加緩存管理消息,流表的管理機制,最后提出了具備ICN功能的OpenFlow節(jié)點模型。 (3)搭建SDN實驗平臺,在實驗平臺上驗證了基于SDN安全組播組網(wǎng)方案和基于SDN實現(xiàn)ICN組網(wǎng)方案的有效性。實驗表明本文提出的組播機制,用戶加入組播組時的需要鑒權(quán),非法用戶不能加入組播組。與傳統(tǒng)IP組播相比,由于采用了集中式控制器計算組播樹,具有更小的用戶接入時延�；赟DN實現(xiàn)ICN方案中,和傳統(tǒng)IP技術(shù)相比,由于在網(wǎng)絡(luò)在進(jìn)行了緩存,減小了源服務(wù)器的負(fù)載量,并且用戶直接從距離較近的節(jié)點中獲取內(nèi)容,有更小的傳輸時延。 文章的最后對全文所做的工作進(jìn)行總結(jié),并且對以后的工作進(jìn)行了展望。
[Abstract]:With the continuous innovation of network interconnection technology, the traditional TCP/IP network is developing in the direction of higher speed, more open and more intelligent. A variety of new network technologies and protocols are emerging. Based on the best possible transmission concept, there are many challenges in carrying new services, such as scalability, security, There are many problems in virtualization, such as QoS. Researchers have begun to design a new framework to solve these problems. Software defines the network SDN(Software-Defined network, because of its open network architecture, programmability, centralized control, and so on. Resource virtualization and other advantages have been widely concerned by academia and the business community. The simple SDN architecture model is relatively simple, How to effectively utilize the advantages of SDN to realize business requirements is the focus of people's attention. This paper focuses on the research of SDN networking technology for future network service awareness and data awareness. Firstly, this paper analyzes the SDN network architecture and OpenFlow. Protocol and the characteristics of SDN network devices, As a kind of future network framework, the typical networking scheme of SDN in enterprise network, campus network, wireless access network, data center and so on is investigated. The research on networking technology should take into account the need of realizing traditional network service. It is also necessary to make full use of the programmable characteristics of SDN to consider how to carry future network applications such as information-centric network ICN(Information-Centric network. This paper discusses two networking application models. (1) aiming at the uncontrollable multicast network and the arbitrariness of user access, a secure multicast network model based on SDN is proposed, in which the network forwarding nodes are not required to maintain complex multicast routing protocols. According to the global topology, the SDN controller is responsible for establishing multicast tree, managing multicast group, authenticating the user's IGMP request, designing the multicast controller and implementing NOX programming based on open source. In this paper, we propose a network scheme based on SDN to implement ICN. ICN network is based on name routing, while SDN forwards data packets based on the fields in stream table matching items. In this paper, a mapping mechanism between ICN information object name and OpenFlow tag is proposed. In order to better meet the requirements of ICN for node caching and name-based routing, the existing OpenFlow protocols are extended, including the addition of cache management messages, the management mechanism of flow tables, and the proposed OpenFlow node model with ICN function. The SDN experimental platform is built to verify the validity of secure multicast network scheme based on SDN and ICN network scheme based on SDN. The experiment shows that the multicast mechanism proposed in this paper needs to be authenticated when users join multicast group. Illegal users can not join multicast group. Compared with traditional IP multicast, the centralized controller is used to calculate multicast tree, which has smaller user access delay. In ICN scheme based on SDN, it is compared with traditional IP technology. Because of the cache in the network, the load of the source server is reduced, and the user gets the content directly from the nearest node, so the transmission delay is smaller. At the end of the article, the work done in the paper is summarized, and the future work is prospected.
【學(xué)位授予單位】：北京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TP393.02

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 胡騫;武穆清;郭嵩;;以內(nèi)容為中心的未來通信網(wǎng)絡(luò)研究綜述[J];電信科學(xué);2012年09期

2 吳強;徐鑫;劉國燕;;基于SDN技術(shù)的數(shù)據(jù)中心基礎(chǔ)網(wǎng)絡(luò)構(gòu)建[J];電信科學(xué);2013年01期

3 畢軍;;SDN體系結(jié)構(gòu)與未來網(wǎng)絡(luò)體系結(jié)構(gòu)創(chuàng)新環(huán)境[J];電信科學(xué);2013年08期

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本文編號：1694688