传统的网络三层架构，网络配置复杂、横向网络数据交换的环路特性降低了网络传输性能。立足于现行的网 络拓扑平台，将现有网络同层结构中的交换单元配置集群与堆叠，运用网络虚拟化技术将多台物理设备逻辑上整合成一个数 据交换模块，网络整体逻辑拓扑中展现成大二层架构模型，既能提高数据传送效率，避免网络环路，增强数据传送安全性，又能 简化网络配置。

In the traditional three-tier network, the characteristics of complex network configuration and horizontal network data exchange reduce the network transmission performance. Based on the topology platform of the current network, the switching units in the existing network layer are to be configured with stack and cluster; multiple physical devices are to be integrated into a data exchange module logically using virtualization technology; and the network logical topology is to be configured into two-layer architectural model. The design improves the data transfer efficiency, avoids network loops, enhances the security of data transmission, and also simplifies the network configuration.