SWITCH VLAN NETWORK & TROUBLESHOOTING TECHNICS

 VLAN TROUBLESHOOTING

 

Hosts and servers that are connected to Layer 2 switches are part of the same network segment. This arrangement poses two significant problems:

• Switches flood broadcasts out all ports, which consumes unnecessary bandwidth. As the number of devices connected to a switch increases, more broadcast traffic is generated and more bandwidth is wasted.

• Every device that is attached to a switch can forward and receive frames from every other device on that switch.

As a network design best practice, broadcast traffic is contained to the area of the network in which it is required. There are business reasons why certain hosts access each other while others do not. As an example, members of the accounting department may be the only users who need to access the accounting server. In a switched network, virtual local area networks (VLANs) are created to contain broadcasts and group hosts together in communities of interest.

A VLAN is a logical broadcast domain that can span multiple physical LAN segments. It allows an administrator to group together stations by logical function, by project teams, or by applications, without regard to physical location of the users.

NOTE: Concept is to understand art of troubleshooting VLAN network and basic knowledge involving advantage of VLAN and its security.