【摘要】：在1973年,以太網(wǎng)誕生了,在過去的幾十年中,雖然有很多種技術(shù)與以太網(wǎng)競爭,但是以太網(wǎng)技術(shù)還是一如既往的快速前進,而有很多技術(shù)已經(jīng)如過往云煙。而現(xiàn)在,網(wǎng)絡(luò)中承載業(yè)務(wù)流量的網(wǎng)絡(luò)接口絕大部分都是以太網(wǎng)接口了,以太網(wǎng)已經(jīng)無處不在,以太網(wǎng)整合網(wǎng)絡(luò)的大勢也越來越顯著了。以太網(wǎng)技術(shù)已經(jīng)明顯超出了其原有的局域網(wǎng)起源,成為一個有吸引力的,強大的解決方案。電信級以太網(wǎng)CE (Carrier Ethernet)概念的出現(xiàn),是以太網(wǎng)技術(shù)最引人注目的一次飛躍。利用電信級以太網(wǎng)超高的效率和靈活性,運營商們可以提供高品質(zhì)的新寬帶服務(wù),同時又大幅度的降低投資成本和維護成本,增加了收入,而廣大用戶可享受更多種類和更加靈活的服務(wù),且費用較低。但是,以太網(wǎng)的可靠性一直以來都是制約其在電信級網(wǎng)絡(luò)上大規(guī)模運營的主要因素。 本文為了增強以太網(wǎng)可靠性,分析了以太網(wǎng)OAM在故障檢測機制中的不足,在現(xiàn)有以太網(wǎng)保護技術(shù)的基礎(chǔ)上,提出了一種基于令牌的保護倒換機制,并對不同拓撲結(jié)構(gòu)的以太網(wǎng)分別設(shè)計了保護方案。 首先,介紹了電信級以太網(wǎng)的相關(guān)概念和基本要求。 隨后,介紹了以太網(wǎng)保護參考模型以及故障檢測方法,詳細敘述了鏈路聚合技術(shù)、生成樹協(xié)議、EAPS、RPR、G.8032和G.8031等以太網(wǎng)保護技術(shù),剖析了其各自的優(yōu)缺點。 接著,針對現(xiàn)有以太網(wǎng)保護技術(shù)中OAM故障檢測機制的不足和保護過程中MAC地址刷新導致的泛洪,提出了基于令牌的保護倒換機制,對線性、單環(huán)和多環(huán)結(jié)構(gòu)分別設(shè)計了保護方案。 最后,通過OPNET仿真軟件對在不同結(jié)構(gòu)下以太網(wǎng)基于令牌的保護過程進行了模擬仿真,驗證了基于令牌的保護倒換機制在以太網(wǎng)中應用的可行性。
[Abstract]:In 1973, Ethernet was born, in the past few decades, although there are many kinds of technologies to compete with Ethernet, but Ethernet technology is as fast as ever, and there are many technologies as in the past. Now, the network interface that carries the service flow in the network is mostly Ethernet interface, Ethernet has been everywhere, the trend of Ethernet integration network is becoming more and more obvious. Ethernet technology has gone beyond its original LAN origins to become an attractive, powerful solution. The emergence of telecom Ethernet CE (Carrier Ethernet) concept is the most noticeable leap in Ethernet technology. Taking advantage of the high efficiency and flexibility of telecom Ethernet, operators can provide high-quality new broadband services, while significantly reducing investment and maintenance costs, increasing revenue, And the vast number of users can enjoy more types and more flexible services, and lower cost. However, the reliability of Ethernet has been a major constraint on its large-scale operation in telecom-grade networks. In order to enhance the reliability of Ethernet, this paper analyzes the shortcomings of Ethernet OAM in fault detection mechanism. Based on the existing Ethernet protection technology, a token based protection switching mechanism is proposed. Protection schemes are designed for Ethernet with different topologies. Firstly, the concept and basic requirements of telecom-level Ethernet are introduced. Then, the ethernet protection reference model and fault detection method are introduced, and the link aggregation technology, EAPSU RPRP G.8032 and G.8031 Ethernet protection technologies are described in detail, and their respective advantages and disadvantages are analyzed. Then, aiming at the deficiency of OAM fault detection mechanism in the existing Ethernet protection technology and the flooding caused by MAC address refresh in the protection process, a token based protection switching mechanism is proposed. The protection schemes of single ring and multi-ring structures are designed respectively. Finally, the token based protection process of Ethernet is simulated by OPNET simulation software, which verifies the feasibility of token based protection switching mechanism in Ethernet.
【學位授予單位】：西南交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.11

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