【正文】 技術(shù)， 以 簡化 處于 核心 的 路由器路由選擇方式，結(jié)合傳統(tǒng)路由技術(shù)的標記交換來 實現(xiàn)的 IP 虛擬專用網(wǎng)絡（ IP VPN），可構(gòu)造寬帶 的 Intra、 Extra， 來 滿足多種靈活的業(yè)務需求。 當今互聯(lián)網(wǎng)應用需求 與日俱增 ，對帶寬、時延的要求也越來越高 ； 如何提高轉(zhuǎn)發(fā)效率 ， 各 路 由 器 廠商 做 了 大 量 改 進 工 作 ， 如 Cisco 在 路 由 器 上 提 供 CEF（ CiscoExpressForwarding）功能 ， 修改路由表搜索算法等等。 ATM 和 IP 曾是兩個互相對立的技術(shù)， 但 最終這兩種技術(shù)融合，那就是MPLS(MultiProtocolLabelSwitching)技術(shù)的誕生！ MPLS 技術(shù)結(jié)合 了 IP 技術(shù)信令簡單和ATM 交換引擎高效的優(yōu)點 ，已能輕松應對各種靈活的業(yè)務需求。 關(guān)鍵詞： 多標記協(xié)議交換 虛擬專用網(wǎng) IP 數(shù)據(jù)轉(zhuǎn)發(fā) 路由器 MPLS 北華 航天工業(yè)學院畢業(yè)論文 II Abstract MPLS VPN is a IPVPN based on MPLS technology , in work routing and switching device using MPLS technology, in order to simplify the in core router ro ute selection mode, bining the traditional routing technology to achieve the IP label switching virtual private work ( IP VPN ), can construct broadband Intra, Extra, to meet the needs of a variety of flexible business needs. Today39。 how to improve the transmitting efficiency, each router manufacturers made a lot of improvements, such as Cisco with CEF ( CiscoExpressForwarding ) function, modify the routing table search algorithm and so on. But this does not pletely solve the current serious problems the Inter is facing with . ATM and IP were two opposite to each other, but in the end the two technology integration, that is MPLS ( MultiProtocolLabelSwitching ) technology was born! MPLS technology bined with IP technology and ATM signaling simple exchange engine has high efficiency, can easily deal with all kinds of flexible business needs. This paper mainly introduces the MPLS VPN technology and application. Keyword: MultiProtocol Label Switching virtual private work IP data forwarding router MPLS 北華 航天工業(yè)學院畢業(yè)論文 III 目 錄 摘 要 .................................................................................................................................... I Abstract ................................................................................................................................. II 第 1 章 緒論 ....................................................................................................................... 1 課題研究現(xiàn)狀分析 .............................................................................................. 1 本領(lǐng)域內(nèi)已開展的研究工作 ................................................................... 1 已經(jīng)取得的研究成果 ............................................................................... 1 選題意義 .............................................................................................................. 2 課題研究的主要內(nèi)容 .......................................................................................... 3 第 2 章 系統(tǒng)需求分析 ....................................................................................................... 4 問題提出 .............................................................................................................. 4 可行性分析 .......................................................................................................... 4 技術(shù)可行性 ............................................................................................... 5 經(jīng)濟可行性 ............................................................................................... 5 系統(tǒng)的設計目標 .................................................................................................. 5 系統(tǒng)需求概述 ...................................................................................................... 5 第 3 章 開發(fā)技術(shù)和開發(fā)環(huán)境 ........................................................................................... 7 MPLS VPN 核心技術(shù) ......................................................................................... 7 PE 路由器的改造和 VRF 的導入 ........................................................... 7 MPBGP 協(xié)議對 VPN 用戶路由的發(fā)布 ................................................. 7 倒數(shù)第二跳彈出 ....................................................................................... 8 MPLS VPN 理論 知識 ......................................................................................... 8 MPLS 包頭結(jié)構(gòu) ....................................................................................... 8 MPLS 術(shù)語 ............................................................................................... 9 LDP ........................................................................................................... 9 MPLS 標簽的分配和管理 ..................................................................... 10 RT ....................................................................................................................... 12 RT 的本質(zhì) ............................................................................................... 12 RT 的靈活應用 ....................................................................................... 13 RD ...................................................................................................................... 13 RD 的本質(zhì) .............................................................................................. 13 RD 的靈活應用 ......................................