隨著中小型企業的高速發展，對網絡處理和傳輸性能提出了新的要求。由于網點接入路由器和終端接入設備年代較久，性能和擴展能力都出現了瓶頸，嚴重影響網點業務的發展和客戶服務質量。為此本論文設計了一個中小型企業的網絡工程，從而解決了由于設備性能低下出現瓶頸的問題，而且提高了企業網絡工程的擴展能力。 本論文首先討論了中小企業網的背景、意義、應用現狀以及研究與開發現狀，然后對OSPF協議、DHCP協議、VLAN的劃分、靜態路由以及數據流控制等相關技術理論作了簡單的論述，其次結合工程項目，論述了企業網絡的需求分析、整體設計，其中包括對IP地質的劃分，網絡拓撲圖等做了分析和描述。接下來，論文著重討論了基于OSPF協議的網絡工程的設計和實現，詳細地論述了各個協議的運用和實現方法。最后，對整個網絡進行了測試。 關鍵詞：網絡工程；協議；性能；擴展 ABSTRACT With the rapid development of small and medium enterprises, this network processing and network transmission performance and scalability of terminal smooth raised new demands. As the network access routers and terminal access device's longer, performance and scalability bottlenecks have appeared, it affect the network business development and customer service. To this end this paper, an application of existing small and medium enterprises in network engineering, to solve the poor performance bottleneck because the equipment problems, and improve the ability of the corporate network expansion project. This paper first discusses the background of small and medium networks, meaning, application status, and research and development status, Then on the OSPF protocol, DHCP protocol, VLAN classification, static routing and data flow control and other related technology theory briefly discussed, Secondly, combined with the project, specifically addressing the needs of the corporate network analysis, overall design, including the division of IP addresses, network topology maps were analyzed and described. Next, the paper focused on the OSPF protocol-based network engineering design and implementation. Discussed in detail in the paper the use of various agreements and implementation methods. Finally, test the entire network. Keywords: Network engineering; protocol; performance; expansion