VLAN技术综述

传统局域网中的站点被束缚在所处网络物理位置上,不能按需划分逻辑子网、共享传输信道冲突和广播风暴等,故提出虚拟局域网(Virtual LAN)概念.VLAN的基础是LAN的帧交换和信元交换,每个LAN段通过VLAN网络管理软件与其它LAN段建立连接并可动态地组成新VLAN.VLAN的节点设备可连接到不同交换机的多台集线器上,物理位置的变动不影响其所属的VLAN.VLAN技术包括VLAN的划分、VLAN的信息传递、VLAN的配置、VLAN间的通信及其标准.该技术能充分满足用户对网络灵活性和扩展性的要求,对隔离网络故障、高效率分配网络骨干带宽和降低网络成本提供了技术保障.

The Summarization on Virtual LAN Technology

The node of conventional was fixed in the physical position of its LAN, undistributed logical sub-LAN according as requirement, collided with share transmission channel and broadcast storm, the concept of VLAN are presented. Virtual LAN technology is based on frame switch and cell switch technology, the connection between LANs was accomplished with administration software of networks, and new VLAN was composed dynamically. The node devices of VLAN can be connected on many concentrators of different exchanger, the VLAN was not effected alteration of physical position. VLAN technology includes the partition, information transmission and configuration of VLAN, the communication between VLANs and the standard of VLAN. The mobility and expansibility of VLAN required by user was satisfied with VLAN technology, and technology sustain was provided for separating network fault, fleetly distributing network bandwidth and reducing network cost.