MPLS Configuration on Cisco IOS Software

Case Study 4: Implementing Layer 3 VPNs over Layer 2 VPN Topologies and Providing L2 VPN Redundancy

Figure 14-27 illustrates the topology used for this case study. The requirements posed by Customer A to the SP are as follows:

• Customer A requires Layer 2 VPN connectivity between Routers PE1-A and PE2-A via the SP backbone.

• Customer A requires the ability to provide other Layer 3 services using the connectivity provided by the SP. This includes the ability to provide Layer 3 VPN connectivity between two sites belonging to Customer B by implementing MPLS VPN over the Layer 2 VPN service provided by the SP.

• Customer A requires redundancy between Routers PE1-A and PE2-A connected via the SP infrastructure at Layer 2, enabling fast recovery during ...