Enterprise networks that were built with STP and VRRP are difficult to deploy, difficult to expand, and are of poor availability and reliability. This article analyzes the root cause of these problems and presents a solution to construct enterprise network by using virtualization technology of cloud computing network equipment, i.e., build a stable and reliable enterprise network through effective integration of the simulation experiment, the virtualization technology, and dynamic link aggregation and virtual splitting detection mechanism. In order to evaluate the performance of the scheme, the article gives a number of comparative analysis of the availability, manageability, scalability, and other aspect, and proves that the enterprise network built by virtualization technology based on cloud computing is superior to the network by traditional way in terms of stability, robustness, and other aspects.