本文通过采用核心层、汇聚层和接入层三层网络架构模式，实现高层建筑内局域网系统设计，整个设计由用户 需求分析、网络拓扑设计、IP 地址划分、虚拟局域网（VLAN）设计、网络冗余设计及综合布线设计六部分组成，满足用户通过网 络实现语音、数据、图形图像、视频等高效传送的要求。

This paper uses three- tier network architecture model including core layer, convergence layer and access layer, designs the tall building LAN system. It consists of user needs analysis, network topology design, IP address division, virtual local area network (VLAN) design, network redundancy design and cabling design. The system meets users’requirements for efficiently transferred voice, data, graphics, images and video through the Intern