Practical lesson #3-4 Design of lan in Cisco Packet Tracer. Design of vlans in Cisco Packet Tracer

Practical lesson #3-4
Design of LAN in Cisco Packet Tracer.
Design of VLANs in Cisco Packet Tracer


1. The purpose of the work
This practical work is intended for the following:
– Learning to configure the LAN and VLAN network in the Cisco switch in the Cisco Packet Tracer (CPT);
– To acquire skills to configure VLAN Trunking Protocol (VTP) on CISCO equipment in CPT;
– Learning the basic parameters of Cisco routers and Cisco Layer 2 switches.


2. Brief theoretical information


2.1. VLAN (Virtual Local Area Network) is a local computer network consisting of a group of hosts with a set of common requirements. VLANs allow hosts to be grouped together and separated. Devices within the same VLAN can communicate, but nodes in different VLANs are not visible to each other. Following are the advantages of VLAN:
– fast and adaptive division of devices into groups. One subnet corresponds to one VLAN. Devices in different VLANs are in different subnets. But at the same time, the VLAN is not linked to the location of the device, so devices located at a distance from each other can still be in the same VLAN, regardless of the location.
– reduce traffic that is widely distributed on the network. Each VLAN is a separate broadband domain. For example, a switch is an OSI model layer 2 device. All ports on the switch are in a single wide-spread domain with only one VLAN. Creating additional VLANs on a switch means dividing the switch into several wide distribution domains. If the same VLAN is configured on different switches, then the ports of the different switches form a single wide distribution domain.
– increase network manageability and security. When the network is divided into VLANs, the application of security policies and rules is simplified. With VLANs, security policies can be applied to entire subnets rather than to individual devices. In addition, switching from one VLAN to another involves traversing through a 3rd layer device that applies policies that allow or deny switching from one VLAN to another.
VLANs can be configured on switches, routers, other network devices, and hosts. But switches are best suited to explain VLANs (Figure 1).
A switch is a Layer 2 device, and initially all of the switch’s ports are in VLAN 1, and thus in a single broadcast domain.