【正文】 三峽建行網(wǎng)絡改造總體設計方案書（討論稿） 二零零一年四月2 / 58目 錄第 1 章 三峽建行網(wǎng)絡現(xiàn)狀 ......................................................................................................................4 網(wǎng)絡連接現(xiàn)狀 .................................................................................................................................4 三峽建行城域網(wǎng)現(xiàn)狀 .............................................................................................................4 三峽建行局域網(wǎng)現(xiàn)狀 .............................................................................................................5 三峽建行廣域網(wǎng)現(xiàn)狀 .............................................................................................................6 與 Inter 連接狀況 ..............................................................................................................7 網(wǎng)絡應用現(xiàn)狀 .................................................................................................................................8 管理網(wǎng)應用現(xiàn)狀 .....................................................................................................................8 營業(yè)網(wǎng)應用現(xiàn)狀 .....................................................................................................................9 外連網(wǎng)應用現(xiàn)狀 ...................................................................................................................10 網(wǎng)絡安全現(xiàn)狀 ...............................................................................................................................11 網(wǎng)絡管理的現(xiàn)狀 ...........................................................................................................................12 三峽建行網(wǎng)絡存在主要問題 .......................................................................................................12 三峽建行城域網(wǎng)存在的問題 ...............................................................................................12 營業(yè)網(wǎng)存在的問題： ...........................................................................................................13 管理網(wǎng)（企業(yè)網(wǎng)）存在的問題 ...........................................................................................13 外連網(wǎng)存在的問題 ...............................................................................................................14第 2 章 網(wǎng)絡改造的需求規(guī)定 ................................................................................................................15 總體目標 .......................................................................................................................................15 網(wǎng)絡改造需求 ...............................................................................................................................15 三峽建行局域網(wǎng) ...................................................................................................................15 三峽建行城域網(wǎng) ...................................................................................................................15 廣域網(wǎng)接入 ...........................................................................................................................16 網(wǎng)絡管理的需求 ...................................................................................................................16 網(wǎng)絡安全管理需求 ...............................................................................................................16 語音、視頻應用的需求 .......................................................................................................17第 3 章 網(wǎng)絡改造的基本原則 ................................................................................................................18第 4 章 網(wǎng)絡總體設計 ............................................................................................................................19 三峽建行網(wǎng)絡系統(tǒng)改造目標總體架構 .......................................................................................19 組網(wǎng)模式 ...............................................................................................................................19 網(wǎng)絡總體拓撲結構設計 .......................................................................................................20 局域網(wǎng)改造 ...................................................................................................................................20 局域網(wǎng)改造方案 ...................................................................................................................20 城域網(wǎng)改造 ...................................................................................................................................22 廣域網(wǎng)改造 ...................................................................................................................................23 廣域網(wǎng)分布層改造 ...............................................................................................................23 廣域網(wǎng)接入層改造 ...............................................................................................................24 外網(wǎng)的連接 ...................................................................................................................................25 可靠性設計 ...........................................................................................................................263 / 58 設備備份 ...............................................................................................................................26 鏈路備份 ...............................................................................................................................27 網(wǎng)絡 IP 路由設計 .........................................................................................................................27 面向應用的網(wǎng)絡服務 ...................................................................................................................28 業(yè)務分類和數(shù)據(jù)特點的分析： ...........................................................................................28 QOS 保證 ...............................................................................................................................28第 5 章 三峽建行網(wǎng)絡管理設計 ........................................................................