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VLAN(Virtual Local Area Network)又称虚拟局域网,是指在交换局域网的基础上,采用网络管理软件构建的可跨越不同网段、不同网络的端到端的逻辑网络。一个VLAN组成一个逻辑子网,即一个逻辑广播域,它可以覆盖多个网络设备,允许处于不同地理位置的网络用户加入到一个逻辑子网中。本文将介绍vlan的特点与原理,vlan的主要功能,重点在于介绍如何在三层交换机上配置vlan。这对于vlan的理解以及在实际的配置中有较好的参考价值。
Virtual Local Area Network (VLAN), also known as virtual local area network, refers to an end-to-end logical network constructed by using network management software that can span different network segments and different networks based on switched LANs. A VLAN forms a logical subnet, a logical broadcast domain that can cover multiple network devices, allowing network users in different geographical locations to join a single logical subnet. This article will introduce the features and principles of vlan, vlan’s main function, the focus is on how to configure the vlan on the Layer 3 switch. This understanding of vlan and in the actual configuration has a good reference value.