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Practical BGP by Sangli Srihari, Russ White, Danny McPherson

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Putting It Together: An MPLS/BGP VPN Example

At this point, we've examined each piece of the puzzle—BGP for signaling and MPLS for forwarding—and discussed how they are used together. To make these concepts clear, we'll provide an example of how an PMLS/BGP VPN would actually be configured and deployed in the real world.

Examining the Control Plane

In Figure 10.13, we have two intranet VPNs and one extranet VPN. BGP, RIP, and OSPF are used for exchanging routes between PE-CE, and some manually configured (static) routes are included as well.

Figure 10.13. An example of an MPLS/BGP VPN.

There are three VPNs defined in this network:

  • Intranet VPN ...

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