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VPWS Instances

Typically, a VPWS is associated with customers who want to use L2VPNs to connect geographically dispersed sites in their organization across an MPLS-based service provider core, also known as an MPLS backbone. Each VPWS L2VPN consists of the set of provider edge routers running the corresponding VPWS instance. To provide connectivity for the L2VPN, BGP builds pseudowires between the VPWS instances on the provider edge routers participating in a particular VPWS L2VPN point-to-point connection.

Figure 131 depicts two L2VPNs: L2VPN A and L2VPN B. L2VPN A connects Customer A’s Boston and Chicago offices, and consists of provider edge routers PE 1 and PE 2, each of which runs a VPWS instance named l2vpnA. Similarly, L2VPN B connects Customer B’s Boston and Chicago offices, and consists of provider edge routers PE 1 and PE 2, each of which also runs a VPWS instance named l2vpnB.

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