VLAN on Cisco switches with Cisco Packet Tracer 5.3 Part 2 of 3

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monica
Published
Explaining what is Vlan, how to configure vlans on cisco switches also how to configure dhcp server on cisco router and the environment is Cisco packet Tracer 5.3
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VLAN Overview

The solution for the community college is to use a networking technology called a virtual LAN (VLAN). A VLAN allows a network administrator to create groups of logically networked devices that act as if they are on their own independent network, even if they share a common infrastructure with other VLANs. When you configure a VLAN, you can name it to describe the primary role of the users for that VLAN. As another example, all of the student computers in a school can be configured in the "Student" VLAN. Using VLANs, you can logically segment switched networks based on functions, departments, or project teams. You can also use a VLAN to geographically structure your network to support the growing reliance of companies on home-based workers. In the figure, one VLAN is created for students and another for faculty. These VLANs allow the network administrator to implement access and security policies to particular groups of users. For example, the faculty, but not the students, can be allowed access to e-learning management servers for developing online course materials.



VLAN Details

A VLAN is a logically separate IP subnetwork. VLANs allow multiple IP networks and subnets to exist on the same switched network. The figure shows a network with three computers. For computers to communicate on the same VLAN, each must have an IP address and a subnet mask that is consistent for that VLAN. The switch has to be configured with the VLAN and each port in the VLAN must be assigned to the VLAN. A switch port with a singular VLAN configured on it is called an access port. Remember, just because two computers are physically connected to the same switch does not mean that they can communicate. Devices on two separate networks and subnets must communicate via a router (Layer 3), whether or not VLANs are used. You do not need VLANs to have multiple networks and subnets on a switched network, but there are definite advantages to using VLANs.
Category
Routers and Switches
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