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Presented By: Sehrish Fatima CT-016 Comparison Between Traditional VPN And MPLS VPN VS
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Comparison between traditional vpn and mpls vpn

Jan 20, 2015

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Page 1: Comparison between traditional vpn and mpls vpn

Presented By:Sehrish FatimaCT-016

Comparison Between Traditional VPN And MPLS VPN

VS

Page 2: Comparison between traditional vpn and mpls vpn

Topics:

Introduction Of Traditional VPNModels Of Traditional VPNOverlay VPNPeer-To-Peer VPNMPLS VPNConclusion

Page 3: Comparison between traditional vpn and mpls vpn

Introduction Of Traditional VPN

They considered as old VPN technology.

They are also known as “Leased Lines VPNs” because they used leased lines for communication.

In this type of VPN two or more networks are connected using a dedicated line from an ISP.

Using leased lines they make point-to-point connections.

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Peer-To-Peer

VPNOverlay VPN

Models Of Traditional VPN

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This is one of the model of traditional VPN.

In its environment different sites of organizations are connected through Virtual Circuit(VCs) that is offered by the SP.The VCs makes the communication between the sites more feasible and effective.

The data is gone through WAN switches to its destination.

Overlay VPN

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Model:

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Advantages:

SecurityData

Isolation

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Disadvantages:

High Cost

Difficult Manageme

nt

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Peer To Peer VPN:

To overcome overlay VPN's disadvantages organization switched towards peer to peer VPN.

In this type of model organization exchange their routing information with Service Provide(SP) without using the VCs.

SP takes the charge of routing data for organizations.

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Model

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Advantages:

Cost effectiveEasy

Management

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Disadvantages:

Address Overlapping

Data Leakage

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Multiprotocol Label Switching VPN(MPLS VPN)

It is the new technology of VPN with high performance

MPLS (Multi-Protocol Label Switching) was originally designed to improve the store-and-forward speed of routers.

It requires two or more sites for connection via same ISP

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Multiprotocol Label Switching VPN(MPLS VPN)

It directs data from one network node to the next based on short path labels rather than long network addresses

It solves all the previous problems that were in overlay VPN and peer to peer VPN.

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Working

To avoid address overlapping MPLS used RD with private data space to make it VPNv4.

This VPNv4 send by company’s CE to PE.

Most companies used same PE so PE used VRF to maintains each company route separately.

When information send from source PE to destination PE RT and VPN labels also send.

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WorkingTwo types of labels: top and bottom label

Top label is used to forward information from source PE to destination PE.

When information send from source PE to destination PE RT and VPN labels also send.

Bottom label is used by destination PE that information is send to which CE.

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Model:

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Flow Of VPN Routing Information Sending:

CE sends routing

information of company to PE.

PE receives routing

information

Routing information

combines with RD of VRF to form VPNv4

RT and labels also send to

destination PE

Destination PE injects VPN

rout to correct VRF according

to its RT

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Flow Of Private Data Sending:

CE sends packet to

source PE.

Compares IP address of packet with correct VRF

PE sticks both labels on packet.

Top label forwards it to P-router and

bottom label to destination PE

P-router forwards packet

according to top label

Destination PE checks packet VPN label and

sends to correct CE

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Advantages:

High Efficiency

Data sending isolation

Avoid Address Overlapping

Managed Easily

Cost Effective

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Conclusion:

Through compassion between both VPNs we see that MPLS VPN is much more better than traditional VPN due to its high efficiency, cost effective, easy management and data security. So MPLS VPN is a cost effective and secure solution for company customer to correct different sites around the world.

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Reference

http://ieeexplore.ieee.org/ Engineering Analysis and Research of MPLS VPN

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Thank You