TAILIEUCHUNG - Layer 3 MPLS VPN Enterprise Consumer Guide Version 2

This document is written for networking engineers and administrators responsible for implementing a Layer 3 (L3) MPLS VPN service from a service provider (SP) network. It describes important considerations when choosing an SP and making the necessary connections. This document outlines these considerations, but it is not meant to be a comprehensive design guide. | Layer 3 MPLS VPN Enterprise Consumer Guide Version 2 This document is written for networking engineers and administrators responsible for implementing a Layer 3 L3 MPLS VPN service from a service provider SP network. It describes important considerations when choosing an SP and making the necessary connections. This document outlines these considerations but it is not meant to be a comprehensive design guide. Note Throughout this document references to MPLS VPN mean Layer 3 MPLS VPN. The terms self-managed and unmanaged service are synonymous and refer to a service in which the enterprise customer is responsible for managing the CE devices as well as the devices within each of their sites. Also the terms customer and enterprise are also synonymous and refer to the subscriber of the MPLS VPN service. Contents MPLS VPN Primer 3 Layer 3 MPLS VPN Services Introduction 3 Layer 3 MPLS VPN Terminology 4 Strengths and Limitations of MPLS Layer 3 VPN Services 6 Layer 3 MPLS VPN Operation 6 Layer 3 MPLS VPN Route Distribution Operation 7 Layer 3 MPLS VPN Forwarding Operations 8 Choosing a Service Provider 9 General Architecture and Services 10 Cisco Powered Networks 10 Coverage 11 Inter-AS MPLS VPN 11 PE-CE IP Addressing 11 Cisco Systems Corporate Headquarters Cisco Systems Inc. 170 West Tasman Drive San Jose CA 95134-1706 USA Copyright 2006 Cisco Systems Inc. All rights reserved. Contents Hub-and-Spoke Topology Considerations 11 Extranet Support 12 Remote Access and IPsec 12 Backup Considerations 12 Non-IP Application Support 12 Managed CE Services 13 SLA Agreement and Reporting 13 Routing Considerations 14 Route Limits 14 Routing Protocol Support and Behavior 14 Backdoor Connectivity Options 14 Routing Convergence 15 Load Balancing 15 Layer 2 Access to the MPLS VPN Service 15 Support of Existing Layer 2 Capabilities 15 Access Speed Range 16 Link Failure Detection 16 QoS Capabilities 16 Multicast Capabilities 16 Security 17 Shared Infrastructure 17 MPLS Core Protection 17 .

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