國家實驗網路中以Web為介面的網路管理系統之實作

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沈錕章(Kun-Chang Shen) 查詢紙本館藏

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資訊工程學系

論文名稱

國家實驗網路中以Web為介面的網路管理系統之實作
(A Web-based Network Management System for National Broadband Experimental Networks)

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摘要(中)

國家寬頻實驗網路（National Broadband Experimental Network；簡稱NBEN）之網接中心（Point of Presence with Gigabit capacity；簡稱GigaPOP）及網路骨幹皆已建設完成，其間以ATM網路骨幹連接各大學之GigaPOP，以進行具高頻寬、即時性及服務品質需求之實驗，進而掌握技術發展趨勢及需求成長方向。
本論文在NBEN上研發並實作一以Web為介面之網路管理系統（Web-based Network Management System；簡稱WNMS），讓使用者以人性化且方便的操作介面管理網路，可改善目前NBEN以人工作業方式逐一設定ATM交換機所帶來的不便。它提供一個Web介面（1）讓使用者可以隨時隨地獲得最新網路狀況的資訊，（2）讓使用者透過Web介面線上申請使用網路的頻寬資源，且系統自動回覆處理狀況，（3）自動設定ATM交換機之虛擬路徑或虛擬通道。
為了強化遠程自動遙控各個ATM交換機時所帶來的安全問題，本論文以信賴主機（trusted host）之機制及網路安全技術來克服此一問題。此外，為了能減輕因遠程遙控而在網路中造成額外的負擔，本論文提出使用移動式代理人（mobile agent）的機制。移動式代理人並不會在網路中建立一固定的連線，而是將所需要進行的工作攜帶至遠端的信賴主機執行，而信賴主機上將存在一代理人系統用以執行遠端所交付之任務。因此在使用者眾多的情形下將大幅節省網路頻寬，提高網路品質。使用移動式代理人之攜帶工作的特性，在現有的網路架構下即可發展多樣的網路服務而不需固定的網路連線或特定之通訊協定，讓網路服務之發展更有彈性。

摘要(英)

The GigaPOP (Point of Presence with Gigabit capacity) and the ATM-based backbone of the NBEN (National Broadband Experimental Network) have been constructed completely to provide high-bandwidth and real-time services.
A Web-based Network Management System (WNMS) is proposed in the thesis to provide a friendly and conveniently control interface for managing NBEN. The WNMS is able to improve the inconvenience of artificial operations for setting GigaPOPs one by one. Furthermore, a Web interface is designed to provide the following features：(1) acquire the newest network information, (2) online application for an end-to-end connection and tracing the status, and (3) automatic setup of the VP/VC connections.
In order to enhance the security of remote control for ATM switches, a trusted host mechanism with network security technology is proposed in WNMS. Besides, to reduce the load of the network traffic caused by remotely controlling network devices, a mobile agent technology is proposed in the thesis. A mobile agent could bring the works to remote trusted host without permanent connections. There is a mobile agent system on the trusted host that providing an execution environment to execute the works brought by mobile agents. Therefore, the wasted bandwidth is reduced and the quality of network service is enhanced. Using the properties of mobile agents, various network services can be developed conveniently and permanent connections or a specific protocol at current network infrastructure are not necessary.

關鍵字(中)

★ 移動式代理人
★ 信賴主機
★ 以Web為介面之網路管理工具
★ 網接中心
★ 國家寬頻實驗網路
★ 代理人系統

關鍵字(英)

★ mobile agent
★ trusted host
★ WNMS
★ NBEN
★ GigaPOP
★ mobile agent system

論文目次

第一章緒論1
1.1 國家寬頻實驗網路簡介1
1.2 研究背景4
1.3 研究目標4
1.4 論文架構5
第二章相關研究6
2.1 ATM網路6
2.1.1 同步及非同步傳輸模式6
2.1.2 ATM通訊協定7
2.1.3 ATM交換機工作原理8
2.2SNMP網路管理協定9
2.2.1 SNMP簡介9
2.2.2 SNMP之網路管理機制10
2.3 MOBILE AGENT12
2.3.1 Mobile agent之功能及特徵13
2.3.2 Mobile agent之應用14
2.3.3 安全問題16
第三章 NBEN網路管理系統之設計及實作18
3.1 系統需求分析及設計18
3.1.1 Acquire network information子系統19
3.1.2 Authorized identity子系統20
3.1.3 Add/Delete GigaPOP node子系統25
3.1.4 Apply PVC子系統25
3.1.5 PVC/PVP Create/Delete子系統28
3.2 系統功能33
3.3 系統架構35
3.4 系統實作37
3.4.1 系統配備及實作環境37
3.4.2 系統實作狀況37
3.4.2.1 技術支援38
3.4.2.2 資訊取得38
3.4.2.3 資源分配39
3.4.2.4 實作成果39
第四章使用移動式代理人之系統設計及實作47
4.1 系統分析及設計47
4.1.1 Acquire network information子系統47
4.1.2 PVC/PVP Create/Delete子系統49
4.2 系統架構49
4.3 系統實作53
4.3.1 系統配備及實作環境53
4.3.2 系統實作狀況55
第五章結論及未來發展之方向66
參考文獻68

參考文獻

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指導教授

周立德(Li-Der Chou)

審核日期

2000-7-14

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