Menu Close

What is VLAN and why it is used?

What is VLAN and why it is used?

VLAN is a custom network which is created from one or more local area networks. It enables a group of devices available in multiple networks to be combined into one logical network. The result becomes a virtual LAN that is administered like a physical LAN. The full form of VLAN is defined as Virtual Local Area Network.

What is the difference between a LAN and a VLAN?

A LAN is a network of computers or devices that share a communications line/wireless link to a server within the same geographical area. A VLAN is called a subnetwork that can group together devices on separate physical LANs.

Why do we create VLANs?

What are the primary benefits of using VLANs? A Virtual Local Area Network is a virtual division of systems in a Local Area Network. VLAN allows you to enforce strong security policies, helps with network administration and confinement of broadcast domains, reduces broadcast traffic, etc.

What is difference between switch and VLAN?

With a VLAN, each port on a switch can be configured into a specific VLAN, and then the switch will only allow devices that are configured into the same VLAN to communicate.

How VLAN is created?

You can create a VLAN using most switches simply by logging into the switch via Telnet and entering the parameters for the VLAN (name, domain and port assignments). After you have created the VLAN, any network segments connected to the assigned ports will become part of that VLAN.

Do routers have VLANs?

Routers use subinterfaces as the means to have an interface connected to a VLAN. The router needs to have an IP address/mask associated with each VLAN on the trunk. However, the router has only one physical interface for the link connected to the trunk.

What is VLAN and how it works?

Has a flexible network model.

  • Only a new port-level configuration is required.
  • A single VLAN can be used as an independent LAN.
  • A VLAN can span multiple switches.
  • What do I need to know about setting up VLANs?

    – Connect all devices to form the correct architecture – Configure interfaces so all the devices can “talk” to one another – Create VLANs and assign computers to their respective VLANs – Confirm correct configuration by demonstrating the computers cannot communicate beyond their VLAN

    Why do we use VLANs?

    Broadcast Domains are separated

  • Security by separate devices
  • Flexibility by using software to create separation
  • How to change a port from one VLAN to another?

    a. cd (change directory) into the managed device in quesiton. 2. Enable local-config from the cli 4. Verify the results. Remember to exit out of teh config and exit out of local config settings. 5. Now to change the Vlan 252 to vlan 1, I didthat from the web interface. I cahnged the VLan assignment from the Managed device configuration settings. a.