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MPLS and VPN Architectures, Volume II by Jeff Apcar, Ivan Pepelnjak, Jim Guichard

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Chapter 6. Large-Scale Routing and Multiple Service Provider Connectivity

As interest in the service benefits provided by a Multiprotocol Label Switching (MPLS) virtual private network (VPN) backbone have grown, so have the size and type of end- customers who are seeking their use. This has an impact on the basic connectivity model that the architecture provides because it might not satisfy all the requirements of each client. In many cases, scaling the amount of routing information exchanged with the service provider might be a challenge, or the geographic location of each of the customer's sites might expand beyond the reach of a single service provider. Therefore, different service models are required to address each of these scenarios and ...

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