雷欽隆臺灣大學：電機工程學研究所戴上為Te, Siong-UiSiong-UiTe2007-11-262018-07-062007-11-262018-07-062005http://ntur.lib.ntu.edu.tw//handle/246246/53571這篇論文在叢集式虛擬私用網路閘道器的基礎上，提出可重組化之叢集式虛擬私用網路閘道器。在不停止虛擬私用網路服務的前提下，此設計能動態地增加或減少叢集閘道器內機器。同時也達成了容錯的目標。除了可重組化外，此叢集閘道器同時也有負載分享的機制，可以將負載分攤到各台機器上，避免造成機器負載過重的情形。最後從實作及評估的圖表中，驗證所提出的方案正確性。Based on the VPN gateway using cluster, a reconfigurable VPN gateway via adaptive clustering is proposed in the thesis. Without stopping the VPN service, the proposed VPN gateway can dynamically add or delete a node in the cluster. Reconfiguration of the gateway also implies fault tolerance of the gateway. In addition to reconfiguration, there is also load sharing mechanism in the VPN gateway. The mechanism can share load to each node in the cluster and avoid overloaded nodes in the cluster. Finally, correctness of the proposed gateway is verified from implementation and evaluation figures.Chapter 1 Introduction 1 1.1 VPN Technology 1 1.2 VPN Gateway via Clustering 5 1.3 Reconfiguration of VPN Gateway via Clustering 6 1.4 Thesis Organization 8 Chapter 2 Related Work 9 2.1 System Architecture 9 2.2 Traffic Dispatching Technique 12 2.3 Traffic Redistribution Technique 12 2.4 The Scheme of Cluster VPN Gateway 14 2.5 Discussions 18 Chapter 3 Proposed Reconfigurable VPN Gateway via Adaptive Clustering 19 3.1 System Architecture 19 3.2 System Overview 21 3.3 Initial Setup 24 3.4 Heartbeat mechanism 25 3.5 Traffic Dispatching 26 3.6 Virtual Gateway Migration 27 3.7 Resource Management 29 3.8 Summary 31 Chapter 4 Implementation and Evaluation 32 4.1 Implementation and Test Environment 32 4.2 Zero-Loss Throughput 35 4.3 Load Sharing Effect 36 4.4 Reconfiguration of the Cluster 38 4.4.1 Node Joining 38 4.4.2 Node Leaving or Node Failure 41 4.4.3 Node Joining and Leaving 43 Chapter 5 Conclusions 46 5.1 Discussions 46 5.2 Future Work 47 Reference 48654551 bytesapplication/pdfen-US虛擬私用網路容錯可重組叢集VPNfault tolerancereconfigurationclusterthesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/53571/1/ntu-94-R92921023-1.pdf