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.