隨著網路技術的發展與使用者需求的增加，許多新的網路協議與架構紛紛被提倡出來，而為了提供真實的網路實驗環境，美國史丹佛大學(Stanford University)利用NetFPGA此一可程式化的網路開放性平台，搭配上OpenFlow的概念，實現了網路虛擬化的架構，藉此在不影響工作網路的前提下，提供一個可在真實網路環境下的驗證平台，供研究者來實驗新的網路協定及應用。
目前美國史丹佛大學所提出的NetFPGA OpenFlow Switch可解析封包表頭第二層到第四層的欄位，依此辨別出不同的連線進而決定其處理動作，但當多個連線共用處理路徑時，難免會彼此造成競爭而互相影響，因此本論文利用NetFPGA OpenFlow Switch可解析封包表頭的特性，於NetFPGA平台上實作了流量管理模組，利用此流量管理模組可對相同處理路徑的連線提供不同處理優先權，更可利用流量管控功能來指定其輸出流量，將對後端網路的影響與連線間資源的競爭降到最低，實驗結果顯示，實作出來的流量管理模組在對流量的管控上，TCP連線準確度可達95%以上，而UDP連線更是逼近於100%，流量管控搭配上優先權佇列的使用，更能有效減少高優先權流量封包的延遲及抖動，因此流量管理模組能確實達到流量管控的功能。
本論文所實作之流量管理模組，善用了NetFPGA平台的模組化特性，使用者可依其使用需求將流量管理模組加至所欲管控的輸出佇列之後，再配合上指定的資料處理格式，便可以簡單的移植至NetFPGA平台的其他專案，使程式的可移植性與可利用性達到最高。

With the development of network technology and the increase in user demand, many new Internet protocols and architectures have been promoted. In order to provide a real network environment for experiment, Stanford University combined NetFPGA with OpenFlow to achieve network virtualization. NetFPGA is a programmable network platform and OpenFlow is a virtualization technology. Stanford University uses these providing a way for researchers to run experimental protocals in the network.
The NetFPGA OpenFlow Switch proposed by Stanford University could resolve Layer 2 to Layer 4 of the packet header fields. It uses these fields to distinguish different connections and determine their processing operations. Unfortunately, when multiple connections share the same path, it would inevitably result in competing and impacting with each other. In order to avoid these phenomenons, this paper implements a traffic management module on NetFPGA OpenFlow Switch. Traffic management module could not only give different priorities to different connections, but also control the output traffic in the same path. It will minimize the impact and competition for resources between the back-end network connections. The experimental results show the traffic management module has good performance on the control of flows. The accuracy rate is 95% for TCP connections and close to 100% for UDP connections. Flow control with the use of priority queues may also reduce the delay and jitter for high priority packets. These means traffic management module can actually achieve the goal of traffic management.
The traffic management module implemented in this paper use the character of modularity of NetFPGA well which let portability and availability be the highest. NetFPGA developers can simply add the traffic management module this paper proposed in their systems and use them happily.

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