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VIRTUAL LAN TECHNOLOGY

SEMINAR ON. VIRTUAL LAN TECHNOLOGY. Basic Devices In Network Backbone. Bridges Switches Routers Hubs. LAN. Local Area Network is network of computers located within the same area Network as a single broadcast domain Routers take more time to process incoming data. Physical view of LAN.

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VIRTUAL LAN TECHNOLOGY

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  1. SEMINAR ON VIRTUAL LAN TECHNOLOGY

  2. Basic Devices In Network Backbone Bridges Switches Routers Hubs

  3. LAN • Local Area Network is network of computers located within the same area • Network as a single broadcast domain • Routers take more time to process incoming data

  4. Physical view of LAN

  5. VLAN • VLAN stands for Virtual Local Area Network. • Viewed as a group of devices on different physical LAN • can communicate with each other as if they were all on the same physical LAN • Configured through software rather than hardware • extremely flexible

  6. Physical view of VLAN

  7. How VLAN Work...?

  8. VLAN types • Layer1- Port-based VLANs • Layer2 - MAC address based VLANs • Layer3 - Protocol based VLANs

  9. Layer-1 VLANs • Port-based VLANs • Uses the physical layer port number on the front of the VLAN switch to assign computers to VLAN segments • Network manager must know which computer is connected to which port • Advantage • Configuration is fairly straightforward

  10. Vlan defined by port

  11. Layer-2 VLANs • MAC-based VLANs • Uses the data link layer address to form the VLANs • Advantage: • Simpler to manage when computers are moved • No configuration needed

  12. Layer-3 VLANs • IP-based VLANs • Uses the network layer address to form the VLANs • Compared to Layer-2: • Reduce the time spent reconfiguring the network • A bit slower at processing each message • Advantage: • Can manually input/change IP addresses • NO configuration is needed

  13. Multi-Switch VLAN

  14. Multi-Switch VLAN cont. • Works the same way as a Single-Switch VLAN, except: • Several switches are used Advantage: • Incresed performance • Increased security option

  15. Benefit of VLANs • The key benefit of VLANs is that they permit the network administrator to organize the LAN logically instead of physically.

  16. Why use VLAN’s.? • Performance • Formation of virtual workgroups • Simplified administration • Reduced cost • Security

  17. Disadvantages • 1. Communication Problem • 2.Complexity • 3.Capacity • 4.Infection

  18. Conclusion • Reduce the cost of dealing with moves and changes • For organizations, • seen as an added benefit

  19. You’ve got ? minutes to ask… Any Question?

  20. THANK YOU………………..

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