【正文】 ................................................................ 39 核心層網(wǎng)絡(luò)設(shè)計原則 ................................................................... 39 匯聚（分布）層網(wǎng)絡(luò)設(shè)計原則 ..................................................... 39 接入層網(wǎng)絡(luò)設(shè)計原則 ................................................................... 40 網(wǎng)絡(luò)拓?fù)湓O(shè)計 ............................................................................................ 40 核心層網(wǎng)絡(luò)設(shè)計 ............................................................................... 42 匯聚 層網(wǎng)絡(luò)設(shè)計 ............................................................................... 43 接入層網(wǎng)絡(luò)設(shè)計 .......................................................................... 43 具體設(shè)計說明 ............................................................................................ 44 核心層配置說明 ............................................................................... 44 服務(wù)器匯聚層配置說明 .................................................................... 47 廣域網(wǎng)鏈路接入層網(wǎng)絡(luò) ..................................................................... 49 匯聚層交換機(jī) ................................................................................... 50 接入層配置說明 ............................................................................... 52 設(shè)備清單 ......................................................................................... 55 四、 VLAN 的設(shè)計和實現(xiàn) ......................................................................................... 61 五、 IP 地址規(guī)劃設(shè)計 .............................................................................................. 62 IP 地址規(guī)劃原則 ......................................................................................... 62 IP 地址規(guī)劃建議 ................................................................................ 64 向 IPv6 過渡 ...................................................................................... 65 技術(shù)簡介 ..................................................................................... 65 IP 的遷移 .................................................................................... 65 問題 ............................................................................................ 66 六、路由設(shè)計 .......................................................................................................... 67 路由規(guī)劃原則 ............................................................................................ 67 常見路由協(xié)議比較 ..................................................................................... 67 嶺澳二期廠區(qū)信息網(wǎng)絡(luò)路由設(shè)計 ................................................................ 69 七、網(wǎng)絡(luò)可靠性設(shè)計 ............................................................................................... 71 設(shè)備可靠性設(shè)計 ................................................................................. 71 節(jié)點可靠性設(shè)計 ................................................................................. 71 鏈路可靠性設(shè)計 ................................................................................. 73 網(wǎng)絡(luò)層可靠性設(shè)計 .............................................................................. 73 應(yīng)用層可靠性設(shè)計 .............................................................................. 74 八、 QoS 設(shè)計 ......................................................................................................... 75 QoS 定義 ........................................................................................... 75 實現(xiàn)方式 ............................................................................................ 75 北電交換機(jī)上 Qos的實現(xiàn) .................................................................. 77 九、網(wǎng)絡(luò)安全設(shè)計 ................................................................................................... 80 環(huán)境和硬件 ........................................................................................ 80 網(wǎng)絡(luò)層安全 ........................................................................................ 80 防止對網(wǎng)絡(luò)設(shè)備的非法訪問 ......................................................... 80 安全使用網(wǎng)絡(luò)設(shè)備 ....................................................................... 81 使用 VLAN 技術(shù)隔離數(shù)據(jù) ............................................................ 82 入侵檢測和漏洞掃描 .......................................................................... 82 防火墻系統(tǒng) ........................................................................................ 83 病毒防護(hù)系統(tǒng) ..................................................................................... 84 操作系統(tǒng)層安全 ................................................................................. 85 數(shù)據(jù)庫層安全 ..................................................................................... 85 應(yīng)用層安全 ........................................................................................ 86 安全管理層 ........................................................................................ 86 十、優(yōu)秀的網(wǎng)絡(luò)升級能力 ........................................................................................ 87 層次化的結(jié)構(gòu)是網(wǎng)絡(luò)擴(kuò)充的基礎(chǔ) ......................................................... 87 設(shè)備端口的擴(kuò)充 ................................................................................. 88 網(wǎng)絡(luò)帶寬的擴(kuò)充 ................................................................................. 88 應(yīng)用種類的增長 ................................................................................. 88 網(wǎng)絡(luò)規(guī)劃充分考慮系統(tǒng)擴(kuò)充需求 ......................................................... 89 十一、網(wǎng)絡(luò)管理設(shè)計 ............................................................................................... 90 網(wǎng)絡(luò)管理方案設(shè)計 ................................................................................... 90 網(wǎng)絡(luò)管理 ................................................................................................. 90 十二、工程公司網(wǎng)絡(luò)分離方案 ................................................................................. 93 網(wǎng)絡(luò)現(xiàn)狀 ................................................................................................. 93 網(wǎng)絡(luò)分離步驟 .