【正文】 plication plexity, the emergence of a diversity of the situation. In fiber direct architecture auspicious bits Ether (the future is 10GbE) broadband IP intracity works are bee mainstream. Elastic grouping ring into new standard RPR will develop. These will be widely used for petitive from the SDH evolution will be more business platform for the traditional operators used the tools to IP business transition. The original more business platform based on ATM will gradually to withdraw from the field. For Tb/s more broadband metro core s,will use the light switch by DWDM (wavelength router) constitute light much business platform. Operators construction broadband metropolitan design, equipment adopting which depends on its market position, service object request and it has the resources prehensive analysis, choose. Keywords: Broadband IP intracity works Backbone Network IPv4 standard RPR 畢業(yè)設(shè)計(jì)（論文） III 目 錄 1. 緒論 ........................................................... 1 2. 寬帶 IP城域網(wǎng)的基本理論 .......................................... 3 IP 城域網(wǎng)的概念 .................................................... 3 寬帶 IP 城域網(wǎng)的網(wǎng) 絡(luò)結(jié) 構(gòu) ............................................ 3 核心 層 .......................................................... 4 匯聚層 .......................................................... 4 接入 層 .......................................................... 5 寬帶 IP 城域網(wǎng)分 類(lèi) .................................................. 5 寬帶 IP 城域網(wǎng)優(yōu)化的意義 ............................................ 5 設(shè)計(jì) 提出背景 ....................................................... 6 3. 寬帶 IP城域網(wǎng)關(guān)鍵技術(shù) ............................................ 8 寬帶 IP 城域網(wǎng)網(wǎng)絡(luò)技術(shù) .............................................. 8 寬 帶 IP 城域網(wǎng)骨干層技術(shù)及性能對(duì)比分析 .............................. 9 千兆以太網(wǎng)技術(shù)（ GE） ............................................ 9 異步轉(zhuǎn)移模式（ ATM） ............................................. 9 技術(shù)（ IP over SDH 技術(shù)） ...................................... 9 動(dòng)態(tài)分組傳輸輸技術(shù)（ DPT） ....................................... 9 結(jié)論 ........................................................... 10 寬帶接 入層技術(shù) .................................................... 10 寬帶城域網(wǎng)建設(shè)技術(shù)路線 ............................................ 13 以 ATM 為骨干的城域網(wǎng) ........................................... 13 以 IP 為骨干的城域網(wǎng) ............................................ 13 構(gòu)建于 layer2 的城域網(wǎng) .......................................... 13 構(gòu)建于 layer3 的城域網(wǎng) .......................................... 13 接入提供商共同面臨的問(wèn)題 ....................................... 14 4. 寬帶城域網(wǎng)建設(shè)方案 .............................................. 18 電信業(yè)務(wù)新需求 .................................................... 18 業(yè)務(wù)需求分析 ................................................... 18 各種電信業(yè)務(wù)對(duì)線路帶寬的要求 ................................... 18 畢業(yè)設(shè)計(jì)（論文） IV 市場(chǎng)需求分析 ................................................... 19 電信寬帶技術(shù)應(yīng)用選擇分析 .......................................... 20 寬帶應(yīng)用的特點(diǎn) ................................................. 20 電信寬帶網(wǎng)的組網(wǎng) ............................................... 20 寬帶技術(shù)的選取 ................................................. 21 電信級(jí)以太網(wǎng)組網(wǎng)與設(shè)備選型 ........................................ 22 電信以太網(wǎng)與傳統(tǒng)園區(qū)網(wǎng)的區(qū)別 ................................... 22 電信以太網(wǎng)的設(shè)計(jì) ............................................... 22 路由規(guī)劃 ....................................................... 23 地址翻譯（ NAT） ................................................ 24 地址分配 ....................................................... 24 網(wǎng)絡(luò)設(shè)備的選擇 .................................................... 25 核心交換機(jī) ..................................................... 25 接入層交換機(jī) ................................................... 25 寬帶 IP 城域網(wǎng)增值業(yè)務(wù) ............................................. 26 智能化社區(qū)服務(wù)系統(tǒng) ............................................. 26 電子商務(wù) ....................................................... 26 會(huì)議電視 ....................................................... 26 網(wǎng)上教育 ....................................................... 27 遠(yuǎn)程醫(yī)療 ....................................................... 27 5. 寬帶城域網(wǎng)建設(shè) ................................................. 28 網(wǎng)絡(luò)規(guī)劃設(shè)計(jì) ...................................................... 28 網(wǎng)絡(luò)技術(shù)發(fā)展簡(jiǎn)介 ............................................... 28 網(wǎng)絡(luò)設(shè)計(jì)的核心就是把握住應(yīng)用需求 ............................... 29 網(wǎng)絡(luò)技術(shù) .......................................................... 29 普通以太網(wǎng)（ ETHENET） .......................................... 29 快速以太網(wǎng)（ FAST ETHENET） ..................................... 30 交換式以太網(wǎng)（ SWITCH ETHENET） ................................. 30 千兆位以太網(wǎng) ................................................... 30 光纖分布式數(shù)據(jù)接口（ FDDI） ..................................... 30 異步傳輸模式（ ATM） ............................................ 30 畢業(yè)設(shè)計(jì)（論文） V 網(wǎng)絡(luò)通信協(xié)議 ...................................................... 31 網(wǎng)絡(luò)拓?fù)浣Y(jié)構(gòu) ...................................................... 33 星型拓?fù)洌?STAR） ............................................... 33 環(huán)型拓?fù)洌?RING） ............................................... 33 樹(shù)型拓?fù)洌?TREE） ............................................... 33 . 星型環(huán)拓?fù)洌?STARRING） ....................................... 33 網(wǎng)絡(luò)傳輸介質(zhì) ...................................................... 34 網(wǎng)絡(luò)互連設(shè)備 ...................................................... 34 網(wǎng)絡(luò)操作系統(tǒng) ...................................................... 34 網(wǎng)絡(luò)操作系統(tǒng)的特點(diǎn) ............................................. 34 選擇網(wǎng)絡(luò)操作系統(tǒng)的策略 ......................................... 34 6. 寬帶 IP城域網(wǎng)組網(wǎng)案例 ........................................... 36 規(guī)模需求 .......................................................... 36 主干部分 .......................................................... 36 IP 信息會(huì)聚點(diǎn) ................................................