Case Study—Hub and Spoke MPLS VPN Network Using BGP PE-CE Routing for Sites Using Unique AS Numbers

Figure 6-22 shows an MPLS VPN network implementing BGP PE-CE routing in a hub and spoke environment.

Figure 6-22. Hub and Spoke-Based MPLS VPN Network
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CE1-A, CE2-A, and CE3-A are CE devices. CE1-A is the hub CE for the Customer A network and is connected to PE1-AS1, which is the hub PE router for the Customer A network. CE2-A and CE3-A are spoke sites and are connected to PE2-AS1 and PE3-AS1. As shown in Figure 6-22, the PE-CE link between PE1-AS1 and CE1-A has two links. One link is configured to forward routing information ...

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