本文關(guān)鍵詞：跨數(shù)據(jù)中心虛擬網(wǎng)絡(luò)技術(shù)設(shè)計(jì)與實(shí)現(xiàn)　出處：《國(guó)防科學(xué)技術(shù)大學(xué)》2013年碩士論文　論文類型：學(xué)位論文

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【摘要】：跨數(shù)據(jù)中心虛擬網(wǎng)絡(luò)技術(shù)可以較好的解決數(shù)據(jù)中心集群互聯(lián)問題�？鐢�(shù)據(jù)中心大二層虛擬網(wǎng)絡(luò)技術(shù)實(shí)現(xiàn)在多個(gè)數(shù)據(jù)中心間的虛擬機(jī)無縫遷移和資源池的最大化利用。研究大二層網(wǎng)絡(luò)技術(shù)具有重要的理論意義和實(shí)用價(jià)值。當(dāng)前,國(guó)內(nèi)外已推廣應(yīng)用的跨數(shù)據(jù)中心虛擬網(wǎng)絡(luò)技術(shù)主要有OVS-GRE和OTV技術(shù)。本文針對(duì)這兩種技術(shù)進(jìn)行分析研究,總結(jié)這兩種技術(shù),或多或少都存在著一定的局限性:(1)OVS-GRE能來解決虛擬機(jī)和物理網(wǎng)絡(luò)之間的通信問題,但是該方案只能創(chuàng)建點(diǎn)到點(diǎn)的隧道,且效率較低。(2)OTV技術(shù)能夠在分散的二層數(shù)據(jù)中心之間實(shí)現(xiàn)跨廣域網(wǎng)的二層連接,但是該技術(shù)屬于思科的私有技術(shù),且轉(zhuǎn)發(fā)機(jī)制復(fù)雜、需要其他設(shè)備支持組播、運(yùn)維成本高,尚未實(shí)現(xiàn)標(biāo)準(zhǔn)化,部署成本較高等缺陷。鑒于上述分析,提出了一種新的跨數(shù)據(jù)中心的報(bào)文轉(zhuǎn)發(fā)機(jī)制ODV。文中對(duì)ODV技術(shù)的總體架構(gòu)和實(shí)現(xiàn)進(jìn)行了深入分析。與OTV相比,ODV它簡(jiǎn)化了層次架構(gòu),把數(shù)據(jù)中心雙層架構(gòu)改為單層�？s短了數(shù)據(jù)傳輸過程,原來的傳輸過程的17個(gè)步驟縮減為7個(gè)步驟。減少封裝次數(shù),重新定義傳輸接口,把原來需要的四種接口簡(jiǎn)化為本地、跨越兩種接口,重新定義了數(shù)據(jù)封裝格式,提出了一種新的數(shù)據(jù)包發(fā)送接收規(guī)則。通過一種新的BRUDP報(bào)文收發(fā)模式,通過源與目的端交換DONE信號(hào)與錯(cuò)位位圖,通告未達(dá)數(shù)據(jù)報(bào)信息,來保證未達(dá)報(bào)文重傳,確保報(bào)文傳輸?shù)目煽啃?減小了傳輸開銷。在轉(zhuǎn)發(fā)策略的選擇上提出新的轉(zhuǎn)發(fā)選擇算法。在功能驗(yàn)證和性能測(cè)試中,驗(yàn)證了ODV技術(shù)的可行性,表明該技術(shù)可以實(shí)現(xiàn)數(shù)據(jù)中心之間的二層網(wǎng)絡(luò)的互聯(lián)互通,具有較好的應(yīng)用前景。
[Abstract]:Cross-data center virtual network technology can better solve the problem of data center cluster interconnection. The virtual network technology can realize seamless migration of virtual machine and maximization of resource pool among multiple data centers. It is of great theoretical significance and practical value to study the technology of the second layer network. OVS-GRE and OTV are the main technologies of cross-data center virtual network which have been popularized and applied at home and abroad. In this paper, the two technologies are analyzed and summarized. More or less, there are some limitations. The OVS-GRE can solve the communication problem between virtual machine and physical network, but the scheme can only create a point-to-point tunnel. And the OTV technology of low efficiency can realize the two-layer connection across WAN between the distributed two-layer data centers, but this technology belongs to the private technology of Cisco, and the forwarding mechanism is complex. Other devices are needed to support multicast, the cost of operation and maintenance is high, the standardization has not been realized, and the cost of deployment is high. In view of the above analysis. A new packet forwarding mechanism across data centers, ODV, is proposed. In this paper, the overall architecture and implementation of ODV technology are analyzed in depth. Compared with OTV, it simplifies the hierarchical architecture. The data center double layer architecture is changed to single layer. The data transfer process is shortened, the 17 steps of the original transmission process are reduced to 7 steps, the number of encapsulation is reduced, and the transfer interface is redefined. This paper simplifies four kinds of interfaces into local, spans two interfaces, redefines the data encapsulation format, proposes a new packet sending and receiving rule, and uses a new BRUDP message sending and receiving mode. Through the exchange of DONE signal and dislocation map between source and destination, the information of unreachable Datagram is notified to ensure the retransmission of unreachable message and ensure the reliability of message transmission. The transmission overhead is reduced. A new forwarding selection algorithm is proposed in the selection of forwarding strategy. The feasibility of ODV technology is verified in function verification and performance testing. It is shown that this technique can realize the interconnection and interworking between the two layers of data centers, and it has a good application prospect.
【學(xué)位授予單位】：國(guó)防科學(xué)技術(shù)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2013
【分類號(hào)】：TP393.01;TP308
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本文編號(hào)：1437701