MPLS Over An IPv6 Infrastructure

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TABLE OF CONTENTS

INTRODUCTION5

Multiprotocol Label Switching (MPLS)5

Benefits of MPLS7

Drawbacks of MPLS9

Services Provided by MPLS10

VPNs11

Layer 2 VPNs12

Traffic Engineering13

AToM15

Operations of 6PE17

6PE Router Topology18

6PE Multipath18

Operations of 6VPE19

Operations of AToM21

LITERATURE REVIEW23

METHODOLOGY31

Search Technique32

Literature Search33

DISCUSSION35

Frame Relay35

Structure Of The Frame36

Examples Of Applications36

ATM Technology37

MPLS using ATM technology and Frame Relay38

Structure of MPLS Packets42

Comparison of IPV4 and IPV642

The Technical Features of IPv643

The Advantages And Limitations of IPv4 IPv645

IPv6 in The Mobile World46

REFERENCES48

MPLS Over An IPv6 Infrastructure

INTRODUCTION

Multiprotocol Label Switching (MPLS)

Multiprotocol Label Switching (MPLS) is deployed by many service providers in their IPv4 networks. Service providers want to introduce IPv6 services to their customers, but changes to their existing IPv4 infrastructure can be expensive and the cost benefit for a small amount of IPv6 traffic does not make economic sense. Several integration scenarios have been developed to leverage an existing IPv4 MPLS infrastructure and add IPv6 services without requiring any changes to the network backbone. (Rosen, 2006, pp 78 )

Virtual private networks, BGP / MPLS network infrastructure based on Level 3 (L3VPN) are now widely deployed in telecom operators. The technology introduced in the early 2000s, has made its place among the various offers. It is particularly prevalent to offer solutions to interconnect remote sites to companies for the development of intranet or extranet. (Aggarwal, 2007, pp 125 )These VPNs are based on an infrastructure of heart IP / MPLS shared, and therefore more particularly on IPv4, the version of IP to the widespread introduction of MPLS VPN.

With the exhaustion of address space available on the Internet, a new version of Internet protocol, IPv6, has been specified then gradually deployed. The emergence of IPv6 for many providers, service or content and their clients, poses before the generalization phase of the technical problems of coexistence of both protocols on various areas. (Sharma ,2003, pp87 )To address these questions, the Working Group of the IETF Softwire is dedicated to the standardization of discovery mechanisms, control and encapsulation for communication between islands through IPv4 IPv6 networks and vice versa, for communication between IPv6 islands through an IPv4 network.

Such mechanisms are necessary in scenarios of transition topologies consist of heterogeneous nodes some of which do not activate dual-protocol stack. In these cases, trade between islands IPv4 (respectively IPv6) are sometimes called upon to be "tunneled" over IPv6 transport (resp. IPv4). The solutions identified in this group fit both:

architectures such as "hub and spoke" tunnels using point to point to a hub;

mesh-type architectures (mesh) in which the islands are connected islands of the same address family through tunnels softwire "point to multi-point" between the edge ...