Post on 20-Jan-2015
description
transcript
Presented By:Sehrish FatimaCT-016
Comparison Between Traditional VPN And MPLS VPN
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Topics:
Introduction Of Traditional VPNModels Of Traditional VPNOverlay VPNPeer-To-Peer VPNMPLS VPNConclusion
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.
Peer-To-Peer
VPNOverlay VPN
Models Of Traditional VPN
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
Model:
Advantages:
SecurityData
Isolation
Disadvantages:
High Cost
Difficult Manageme
nt
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.
Model
Advantages:
Cost effectiveEasy
Management
Disadvantages:
Address Overlapping
Data Leakage
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
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.
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.
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.
Model:
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
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
Advantages:
High Efficiency
Data sending isolation
Avoid Address Overlapping
Managed Easily
Cost Effective
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.
Reference
http://ieeexplore.ieee.org/ Engineering Analysis and Research of MPLS VPN
Thank You