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MPLS and VPN Architectures by Ivan CCIE #1354 Pepelnjak, Jim CCIE #2069 Guichard

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Chapter 14. Carrier's Carrier and Inter-provider VPN Solutions

Our description of the MPLS/VPN architecture so far has assumed that all VPN customer sites are connected to a single service provider backbone across PE-to-CE links, and that the exchange of routing information across these links occurs without the need of MPLS, and without any direct exchange of routing information between customer sites. We have also highlighted the fact that a customer may choose to use the MPLS/VPN service to connect sites because this provides a more scalable way of providing VPN connectivity when compared to traditional methods such as the overlay or peer-to-peer models (described in Chapter 7, "Virtual Private Network (VPN) Implementation Options").

However, ...

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