國際化時代，國內企業從早期西向大陸到現在南向東南亞投資設廠，跨國企業資訊流通仰賴網路，M 公司幾年前也南向越南建廠，海外廠初營運時，常碰到國際海纜斷線問題造成兩地資訊無法及時回應或是初期租用低頻寬造成網路壅塞等問題，影響生產效率。透過導入軟體定義廣域網路 SD-WAN，將 Internet 線路與MPLS 線路整合規劃，來改善網路異常狀況。
SD-WAN 將 Internet 線路轉為企業專屬通道來取代自建 IPSec 通道，透過SD-WAN 的多項特性，解決以往傳統網路架構遇到的問題。確保企業在高品質的網路狀態下運作，維持企業競爭力。
本研究透過架設軟體定義廣域網域網路系統 SD-WAN，模擬狀況來測試觀察SD-WAN 的網路反應運作狀況，並驗證是否都能達到 SD-WAN 之特性。本研究結果可讓跨國或有多據點的企業，在考慮是否採用 SD-WAN 為解決方案時，作為參考依據。

In the era of globalization, domestic companies have invested and set up factories toward the west i.e. Mainland China at the earlier phases. Now they tend to go south to Southeast Asia. The information interchanges of transnational corporations rely on the communication networks. Company M also built a factory in the southeast Asia i.e. Vietnam a few years ago. At the begging of the factory’s operation, the international submarine cable disconnection caused the information of the two ends failed to respond in time, or the leased low-frequency bandwidth results in network jams and other troubles. Those barriers affected production efficiency of the factory. Through the implement of software-defined wide area network (SD-WAN), the integration of Internet lines and MPLS lines is planned to improve network failures.
SD-WAN turns Internet lines into an exclusive channel for the company to replace self-built IPSec channels. Through the multiple characteristics of SD-WAN, the problems encountered by traditional network infrastructure in the past can be resolved. Hence, SD-WAN ensures that the company operates under a high-quality network and maintain its competitiveness.
In this research, the software-defined wide area network system (SD-WAN) is set up. The simulative situational models are used to test and observe the operating circumstances of the network response and to verify whether SD-WAN can achieve its features. This research can be a reference for the transnational companies when they are adopting SD-WAN as their solutions for communications.

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