Overview

This module defines the purpose of Virtual Local Area Networks and describes how VLAN implementation can simplify network management and troubleshooting and can improve network performance. When VLANs are created, their names and descriptions are stored in a VLAN database that can be shared between switches. You will see how design considerations determine which VLANs will span all the switches in a network and which VLANs will remain local to a switch block. The configuration components of this module will describe how individual switch ports may carry traffic for one or more VLANs depending on their configuration as access or trunk ports. This Module explains both why and how VLAN implementation occurs in an enterprise network.