Case Study 3: Implementing Layer 2 VPNs over Inter-AS Topologies Using Layer 2 VPN Pseudo-Wire Switching

Service providers SP1 and SP2 are required by Customer A to provide Layer 2 VPN connectivity between multiple sites belonging to Customer A, as illustrated in Figure 14-22.

Figure 14-22. Case Study 3 Topology and Base Configurations
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To enable the implementation of Layer 2 VPN (AToM) over an Inter-AS topology, as shown in Figure 14-22, the ASBR Routers PE2-AS1-ASBR1 and PE1-AS2-ASBR1 are configured for layer2vpn pseudo-wire switching.

Figure 14-22 also outlines the basic configurations for the devices in the SP domain, ...

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