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ICT系統集成

企業WLAN網絡解決方案

一、 企業WLAN網絡面臨的挑戰

      1.1  更安全的防護:安全性是企業應用考慮的第一因素

      1.2  更高效的辦公:泛在感知支持位于任何地點的雇員和客戶接入移動辦公;無縫覆蓋確保無縫網絡中WLAN的性能和可靠性;靈活方便新增設備隨時便捷加入。

      1.3  更好的體驗:泛在終端支持多種終端設備,業務處理期間設備間可以無縫切換;泛在應用更多基于智能終端的辦公應用; BYOD一機在手,公私兼顧,成本最低;良好支持富媒體業務。

      1.4  更低的TCO:從無線孤島到Wi-Fi數據網絡,需要對大量設備的統一安裝維護;無線網絡信號,受環境影響巨大,干擾協調;開放式區域、辦公室等不同場景,AP部署方案不同。


二、企業WLAN網絡的發展趨勢

      企業園區網從傳統有線覆蓋網絡向無線泛在覆蓋網絡發展,目前處于有線無線一體化覆蓋階段。

      

      由于無線網絡覆蓋場所的多樣性、用戶上網行為的復雜性、企業對于網絡安全和網絡質量的需求,需要在進行WLAN規劃時除了WLAN網絡以外,還需考慮到WLAN網絡的通信質量、網絡安全、可靠性、統一管理以及部分行業對無線用戶接入認證、授權的需求。


三、企業WLAN網絡設計思路

      原有有線網絡平滑升級改造,保護既有投資

      新建網絡可以直接泛在覆蓋,節省建網TCO

      有線無線一體化維護管理


四、企業WLAN網絡設計原則

      大中型園區采用AC+FITAP拓撲架構,對于小型或SOHO一般采用AC+FIT AP或FAT AP模式;

      AC采用全分布式部署模式,每個FIT AP區域局域網都有本地化的AC;

      大型園,部署兩臺AC一主一備,小型園區部署單臺AC;

      各區域WLAN僅負責本區域設備覆蓋接入,IP地址獨立分配,區域之間通過有線網絡網關和公共傳輸網絡路由互連。


五、企業WLAN網絡解決方案

      企業園區無線網絡方案依園區規模設計,一般分為總部大型園區、中小型園區及分支機構、SOHO辦公、WDS或MESH四種網絡方案場景;

      WLAN網絡架構在實際部署中分為:自治式架構(FAT AP)和集中式架構(FIT AP)。

      


     自治式架構

     自治式架構下AP實現所有無線接入功能,不需要AC設備形態,WLAN早期廣泛采用自治式架構,隨著企業大量部署AP后,對這些AP進行配置、升級軟件等管理工作將給用戶帶來很高的操作成本,管理成本提高,自治式架構應用逐步減少。

     集中式架構

     該架構通過無線控制器(AC)集中管理、控制多個AP。所有無線接入功能由AP和AC共同完成:

     AC 完成網絡具有重要意義的功能,例如移動管理、身份驗證、VLAN 劃分、射頻資源管理、無線IDS(Intrusion Detection Systems)和數據包轉發等。

     AP 完成無線空口的控制,例如無線信號發射與探測響應、數據加密解密、數據傳輸確認、空口數據優先級管理等等。


企業WLAN網絡方案其它設計內容
    1)、IP地址規則:DHCP Server部署,AC、AP的IP分配。
    2)、SID和VLAN:以太網中管理VLAN和業務VLAN分離。業務VLAN主要用于區分不同的業務類型或用戶群體,AC設備終結VLAN部署。
    3)、漫游設計:漫游是指用戶在部署了WLAN網絡的場所移動時,用戶終端可以從一個AP的覆蓋范圍移動到另一個AP的覆蓋范圍,用戶無需重新登錄和認證,業務不掉線。
    4)、無線覆蓋:射頻信道規劃是無線覆蓋設計中最重要一環,直接影響到無線網絡的帶寬、性能、擴展以及抗干擾能力,最終影響到無線網絡的用戶體驗,因此必須對WLAN信道進行統一規劃。
    5)、Wlan網絡管理工具:通過部署esight wlan組件來實現統一運維


祥云彩票
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