Abstract
Virtual LANs (VLANs) are introduced as some alternative switches to solve for the traffic problems of those LAN networks with Hubs. The idea is to create some collections in the whole LAN network, such collections are the so called VLANs. Appropriate switches (one switch or more of up to 24 ports) are designed to interconnect those VLANs. The design of such VLAN switches looks like the design of Look-Up tables to facilitate routing (similar to those used in CISCO networks). In this paper, an analytical model for such VLANs is proposed and then compared with single VLAN switch from the point of view of validity and speed characteristics.
Highlights
The whole idea of Virtual Local Area Network (VLAN) technology is to divide a LAN into logical, instead of physical, segments
A 4-VLAN switch network model has been proposed with the derivations of the average number of frames and the total time delay
The four VLANs switches model are of equal processing times
Summary
The whole idea of Virtual Local Area Network (VLAN) technology is to divide a LAN into logical, instead of physical, segments. People in the first building and people in the second building can be in the same work group even nest though they are connected to different physical LANs. There are many technique problems in VLANs, such as how to configure VLANs automatically, transfer membership information between switches, and combine VLANs with ATM networks. Comparisons of such model with a single VLAN switch model from the point of view of validity and speed characteristics are included.
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