Layer 3 MPLS VPN Enterprise Consumer Guide

Short Description
Layer 3 MPLS VPN Enterprise Consumer Guide. OL-8851-01. MPLS VPN Primer. Layer 3 MPLS VPN Terminology. Figure 1 illustrates many of the acronyms and terms …

Website: www.cisco.com | Filesize: 820kb

Content
Corporate Headquarters:
Copyright . 2005 Cisco Systems, Inc. All rights reserved.
Cisco Systems, Inc., 170 West Tasman Drive, San Jose, CA 95134-1706 USA
Layer 3 MPLS VPN Enterprise Consumer Guide
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.
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 5
Layer 3 MPLS VPN Operation 6
Layer 3 MPLS VPN Route Distribution Operation 6
Layer 3 MPLS VPN Forwarding Operations 7
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
Hub-and-Spoke Topology Considerations 11
Extranet Support 12
Remote Access and IPsec 12
Backup Considerations 12
Non-IP Application Support 122
Layer 3 MPLS VPN Enterprise Consumer Guide
OL-8851-01
Contents
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
Other Security Policies 17
Connecting to an MPLS/VPN Service Provider 18
CE-PE Routing Considerations 18
Using BGP for CE-PE Routing 18
Using OSPF for CE-PE Routing 26
Using EIGRP for CE-PE Routing 35
Default Route Handling 37
Default Route Handling Overview 38
Default Routing in a Multihub Environment 40
Handling Multiple Default Routes with IGP as PE-CE Protocol 42
Handling Multiple Default Routes with BGP as PE-CE Protocol 43
Load Balancing 44
Multi-homing Scenarios 45
Quality of Service Considerations 47
Changes in QoS Policy Administration 47
Layer 2 Access (Link-Specific) QoS Design 49
Service Provider Service Level Agreements (SLA) 49
Enterprise-to-Service Provider Mapping Models 50…