【摘要】：軟件定義網(wǎng)絡(luò)(SDN)是一種新型的網(wǎng)絡(luò)架構(gòu),具有控制和轉(zhuǎn)發(fā)相分離的特性。OpenFlow是一種比較成熟的SDN網(wǎng)絡(luò)實(shí)現(xiàn)方式,由OpenFlow控制器和OpenFlow交換機(jī)組成,控制器擁有全局的網(wǎng)絡(luò)拓?fù)?能對網(wǎng)絡(luò)進(jìn)行集中控制和管理,交換機(jī)則負(fù)責(zé)根據(jù)控制器下發(fā)的流表匹配數(shù)據(jù)包并執(zhí)行轉(zhuǎn)發(fā)或接收等操作,實(shí)現(xiàn)對網(wǎng)絡(luò)更加細(xì)致的管理。當(dāng)前針對SDN網(wǎng)絡(luò)的測量方案都有一定的局限性,沒有充分結(jié)合SDN網(wǎng)絡(luò)的特點(diǎn)和優(yōu)勢,不能對SDN網(wǎng)絡(luò)進(jìn)行全面的、方便的、靈活的測量。論文設(shè)計(jì)了一種針對SDN網(wǎng)絡(luò)的測量系統(tǒng),充分結(jié)合了SDN網(wǎng)絡(luò)的特性和優(yōu)勢,將測量模塊的控制邏輯和轉(zhuǎn)發(fā)邏輯分別部署于控制器和擴(kuò)展的交換機(jī)中,利用擴(kuò)展的OpenFlow協(xié)議定義測量消息,實(shí)現(xiàn)以軟件定義的方式定義測量任務(wù),完成對路徑的時(shí)延、丟包率等指標(biāo)的測量,更加靈活方便。論文利用搭建的小型虛擬網(wǎng)絡(luò)進(jìn)行驗(yàn)證和測試。先驗(yàn)證各個(gè)模塊的功能是否能夠正確實(shí)現(xiàn),然后在各個(gè)模塊的功能均能正確實(shí)現(xiàn)的基礎(chǔ)上,對整個(gè)測量系統(tǒng)進(jìn)行了集成測試,在虛擬網(wǎng)絡(luò)內(nèi)完成時(shí)延和丟包率等網(wǎng)絡(luò)指標(biāo)的測量。通過對網(wǎng)絡(luò)內(nèi)傳輸?shù)臏y量包的捕獲和分析,可以得到測量包的時(shí)間戳信息、選路信息、排序信息等,并得到時(shí)延和丟包率等測量結(jié)果。由解析的信息和測得的數(shù)據(jù)可知,該SDN的網(wǎng)絡(luò)測量系統(tǒng)能夠?qū)崿F(xiàn)對SDN網(wǎng)絡(luò)的測量,與預(yù)期的結(jié)果相符。
[Abstract]:Software defined network (SDN) is a new type of network architecture. OpenFlow is a mature SDN network implementation mode with the separation of control and forwarding. It is composed of OpenFlow controller and OpenFlow switch. The controller has a global network topology. It can control and manage the network centrally, and the switch is responsible for matching the data packets according to the stream table sent by the controller and performing the operations of forwarding or receiving, so that the network can be managed more carefully. The current measurement schemes for SDN network have some limitations, not fully combined with the characteristics and advantages of SDN network, can not be comprehensive, convenient and flexible measurement of SDN network. In this paper, a measurement system for SDN network is designed, which combines the characteristics and advantages of SDN network. The control logic and forwarding logic of the measurement module are deployed in the controller and the extended switch, respectively. The extended OpenFlow protocol is used to define the measurement message, to define the measurement task in the way of software definition, and to measure the path delay, packet loss rate and so on, which is more flexible and convenient. The paper uses the small virtual network to verify and test. First, verify that the functions of each module can be realized correctly, and then, on the basis of the correct realization of each module, the integrated test of the whole measurement system is carried out. The measurement of network parameters such as delay and packet loss rate is completed in the virtual network. Through the acquisition and analysis of the measurement packets transmitted in the network, the time stamp information, routing information and sorting information of the measurement packets can be obtained, and the measurement results such as delay and packet loss rate can be obtained. From the analytical information and the measured data, it can be seen that the network measurement system of SDN can realize the measurement of SDN network, which is in accordance with the expected results.
【學(xué)位授予單位】：南京郵電大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TP393.0

【參考文獻(xiàn)】

相關(guān)期刊論文 前4條

1 王海濤;;IP網(wǎng)絡(luò)測量技術(shù)簡析[J];電信快報(bào);2010年05期

2 談杰;李星;;網(wǎng)絡(luò)測量綜述[J];計(jì)算機(jī)應(yīng)用研究;2006年02期

3 楊潔,竇伊男,雷振明;IP網(wǎng)絡(luò)流量測量的研究與實(shí)現(xiàn)[J];現(xiàn)代電信科技;2005年11期

4 鄭雄,王懿,張順頤;IP網(wǎng)絡(luò)性能指標(biāo)及其測試方法的研究[J];中國數(shù)據(jù)通信;2003年11期

，

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