Cisco 10000-2P2-2DC Software Guide - Page 38

Broadband Architecture Models Chapter 1 Broadband Aggregation and Leased-Line Overview Figure 1-2 CPE PTA to VRF Architectural Model ATM access network Wholesale provider Cisco 10000 ESR VRF 1 VRF 2 VRF n PPPoX sessions L2 transport network Separate logical/physical interface, one per retail provider Retail provider Provider 1 Provider 2 Provider n 69866 In this model, the Cisco 10000 series router terminates the sessions and places the sessions in the appropriate VRF. This model is identical to the one in Figure 1-3 on the access side. However, the two models differ on the network side. The model in Figure 1-2 uses VRFs, does not use a tag interface on the network side, and separates traffic at Layer 2. The "PTA to MPLS VPN Architectural Model" in Figure 1-3 uses MPLS and a tag interface, and separates traffic at Layer 3. PTA to Multiprotocol Label Switching Virtual Private Network Architecture Figure 1-3 shows a MPLS VPN model for PPPoA or PPPoE sessions. Figure 1-3 PTA to MPLS VPN Architectural Model SP AAA server SP DHCP server Remote user SP access network LAN DSL router DSLAM SP MPLS core PE PE PPPoE Customer network CE Customer AAA server 69868 Cisco 10000 Series Router Software Configuration Guide 1-4 OL-2226-23