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Comparing, Designing, and Deploying VPNs by Mark Lewis, - CCIE No. 6280

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Chapter 5. Advanced MPLS Layer 3 VPN Deployment Considerations

Chapter 4, “Designing MPLS Layer 3 Site-to-Site VPNs,” introduced MPLS Layer 3 VPNs and discussed common topologies and deployments. This chapter covers advanced deployment topologies, such as carriers’ carrier (CSC) and inter-autonomous system, as well as other deployment considerations, such as multicast traffic transport.

The Carriers’ Carrier Architecture

In Chapter 4, the customers of MPLS VPN service providers were considered to be enterprises, but it is also possible that the customer of a service provider might itself be a service provider. This might be the case if, for example, a smaller, customer service provider wanted to take advantage of a larger service provider’s MPLS ...

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