本文選題：生成樹協(xié)議 + ZESR�。� 參考：《北京交通大學》2014年碩士論文

【摘要】：摘要：隨著互聯(lián)網(wǎng)應用的普及與發(fā)展,網(wǎng)絡的帶寬和穩(wěn)定性作為衡量現(xiàn)代計算機網(wǎng)絡性能的重要指標,成為計算機網(wǎng)絡性能提升的重點。收斂時間是指網(wǎng)絡拓撲結構發(fā)生改變到該信息同步到路由器的時間,它是網(wǎng)絡穩(wěn)定性的重要指標之一。最初的生成樹協(xié)議(STP)對網(wǎng)絡拓撲改變的收斂時間為30-50s,這遠遠不能達到現(xiàn)在網(wǎng)絡的要求,隨后又出現(xiàn)了快速生成樹協(xié)議(RSTP)和多實例生成樹協(xié)議(MSTP),但其收斂恢復時間很難維持在1s下,而這對于電信級的以太網(wǎng)50ms的自愈時間要求[25]是遠遠達不到的,所以人們開始關注收斂時間達毫秒級的以太網(wǎng)自動保護協(xié)議(EAPS)。中興以太網(wǎng)環(huán)切換(ZESR)技術就是基于EAPS的以太網(wǎng)環(huán)保護協(xié)議,它的收斂速度可以在50ms以內,但是ZESR還不成熟,存在很多漏洞與不足。 本文主要是從網(wǎng)絡的穩(wěn)定性入手,在對STP進行了詳細了解的基礎上,主要對ZESR協(xié)議進行了深入的分析與研究,發(fā)現(xiàn)了其在環(huán)路狀態(tài)檢測模塊和與MSTP的兼容性方面存在著重大缺陷,本文將針對這兩個缺陷進行詳細分析并提出了解決方案。全文主要分為以下四部分： 第一部分主要介紹了虛擬局域網(wǎng)(VLAN)協(xié)議特點、生成樹協(xié)議的發(fā)展和特點(其中包含STP協(xié)議、RSTP協(xié)議和MSTP協(xié)議)以及EAPS協(xié)議的原理。 第二部分主要分析和研究了ZESR協(xié)議模塊的業(yè)務流程和處理流程,并指出了ZESR的兩個重大缺陷。傳統(tǒng)的以太網(wǎng)的自愈速度太慢,需要以分鐘和秒計,無法達到業(yè)務要求。ZESR-ZTE以太環(huán)網(wǎng)保護技術基于rfc3619協(xié)議的EAPS原理,并在其基礎上進行改進,使得收斂時間在50ms以內。但其存在環(huán)路狀態(tài)檢測模塊和與MSTP的兼容性方面存在著重大缺陷。 第三部分針對ZESR的環(huán)路檢測模塊缺陷提出了以Linkhello協(xié)議作為解決方案。主要對Linkhello協(xié)議的原理、設計方案和修改結果做出了描述。 第四部分針對測試中出現(xiàn)的ZESR協(xié)議與MSTP協(xié)議不兼容而導致的收斂時間過長問題提出了解決方案,通過讓ZESR協(xié)議強制向MSTP協(xié)議發(fā)送拓撲改變報文來達到快速收斂,并對結果進行了測試。
[Abstract]:Absrtact: with the popularization and development of Internet applications, the bandwidth and stability of the network as an important index to measure the performance of modern computer networks, has become the focus of improving the performance of computer networks.Convergence time is the time when the network topology changes to synchronize the information to the router. It is one of the important indicators of network stability.The initial spanning tree protocol (STP) converges to 30-50 s for network topology changes, which is far from meeting the requirements of the current network.Then came the Fast spanning Tree Protocol (RSTP) and the Multi-instance spanning Tree Protocol (MSTP). However, the convergence recovery time is very difficult to maintain at 1s, which is far from the requirement of self-healing time for telecom Ethernet 50ms [25].So people begin to pay attention to the Ethernet automatic protection protocol with convergent time of millisecond.ZTE Ethernet Ring switching (ZES) technology is an Ethernet ring protection protocol based on EAPS. Its convergent speed can be within 50ms, but ZESR is not mature, and there are many flaws and shortcomings.This paper mainly starts with the stability of the network, on the basis of the detailed understanding of STP, mainly analyzes and studies the ZESR protocol in depth.It is found that there are some defects in the loop state detection module and its compatibility with MSTP. This paper will analyze the two defects in detail and put forward a solution.The full text is divided into the following four parts:The first part mainly introduces the characteristics of VLAN protocol, the development and characteristics of spanning tree protocol (including STP protocol and MSTP protocol) and the principle of EAPS protocol.The second part mainly analyzes and studies the business process and processing flow of ZESR protocol module, and points out two major defects of ZESR.The self-healing speed of the traditional Ethernet is too slow to meet the service requirements in minutes and seconds, and the EAPS principle of the Ethernet protection technology based on rfc3619 protocol is improved to make the convergence time within 50ms.However, there are some defects in the loop state detection module and compatibility with MSTP.In the third part, the Linkhello protocol is proposed to solve the defect of ZESR loop detection module.The principle, design scheme and modification result of Linkhello protocol are described.In the fourth part, a solution to the problem of long convergence time caused by the incompatibility between ZESR protocol and MSTP protocol is put forward, which can quickly converge by forcing ZESR protocol to send topology change message to MSTP protocol.The results are tested.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TP393.04

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