Selecting MPLS VPN Services

A guide to using and defining MPLS VPN services Analyze strengths and weaknesses of TDM and Layer 2 WAN services Understand the primary business and technical issues when evaluating IP/MPLS VPN offerings Describe the IP addressing, routing, load balancing, convergence, and services capabilities of the IP VPN Develop enterprise quality of service (QoS) policies and implementation guidelines Achieve scalable support for multicast services Learn the benefits and drawbacks of various security and encryption mechanisms Ensure proper use of services and plan for future growth with monitoring and reporting services Provide remote access, Internet access, and extranet connectivity to the VPN supported intranet Provide a clear and concise set of steps to plan and execute a network migration from existing ATM/Frame Relay/leased line networks to an IP VPN IP/MPLS VPNs are compelling for many reasons. For enterprises, they enable right-sourcing of WAN services and yield generous operational cost savings. For service providers, they offer a higher level of service to customers and lower costs for service deployment. Migration comes with challenges, however. Enterprises must understand key migration issues, what the realistic benefits are, and how to optimize new services. Providers must know what aspects of their services give value to enterprises and how they can provide the best value to customers. Selecting MPLS VPN Serviceshelps you analyze migration options, anticipate migration issues, and properly deploy IP/MPLS VPNs. Detailed configurations illustrate effective deployment while case studies present available migration options and walk you through the process of selecting the best option for your network. Part I addresses the business case for moving to an IP/MPLS VPN network, with a chapter devoted to the business and technical issues you should review when evaluating IP/MPLS VPN offerings from major providers. Part II includes detailed deployment guidelines for the technologies used in the IP/MPLS VPN. This book is part of the Networking Technology Series from Cisco Pressreg;, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.

Chris Lews is a technical projects systems engineer in the Cisco Worldwide Service Provider Operations Group.

Business Analysis and Requirements of IP/MPLS VPN
Assessing Enterprise Legacy WANs and IP/VPN MigrationCurrent State of Enterprise Networks
Evolutionary Change of Enterprise Networks
Acme, a Global Manufacturer
Acme's Global Span
Business Desires of Acme's Management
Acme's IT Applications Base
Acme's IT Communications Infrastructure
New WAN Technologies for Consideration by Acme
Layer 3 IP/MPLS VPN Services
Layer 2 IP/MPLS VPN Services
Convergence Services
Internet Access
Mobile Access and Teleworker Access
Voice Services: Service Provider Hosted PSTN Gateway
Voice Services: Service Provider Hosted IP Telephony
Summary
Chapter 2
Enterprise/Service Provider Relationship and Interface
Investigation Required in Selecting a Service Provider
Coverage, Access, and IP
Financial Strength of the Service Provider
Convergence
Transparency
IP Version 6
Provider Cooperation/Tiered Arrangements
Enhanced Service-Level Agreement
Customer Edge Router Management
Service Management
Customer Reports and SLA Validation
Summary
Analyzing Service Requirements
Application/Bandwidth Requirements
Backup and Resiliency
Enterprise Segmentation Requirements
Mapping VLANs to VPNs in the Campus
Access Technologies
Frame Relay
ATM
Dedicated Circuit from CE to PE
ATM PVC from CE to PE
Frame Relay PVC from CE to PE
Metro Ethernet
QoS Requirements
Bandwidth
Packet Delay and Jitter
Packet Loss
Enterprise Loss, Latency, and Jitter Requirements
QoS at Layer 2
Subscriber Network QoS Design
Baseline New Applications
Develop the Network
Security Requirements
Topological and Network Design Considerations
SP-Managed VPNs
Multiprovider Considerations
Extranets
Case Study: Analyzing Service Requirements for Acme, Inc.
Layer 2 Description
Existing Customer Characteristics That Are Required in the New Network
DefenseCo's Backbone Is a Single Autonomous System
Reasons for Migrating to MPLS
Evaluation Testing Phase
Routing Convergence
Jitter and Delay
Congestion, QoS, and Load Testing
Vendor Knowledge and Technical Performance
Evaluation Tools
TTCP
Lessons Learned
Transition and Implementation Concerns and Issues
Post-Transition Results
Summary
References
Deployment Guidelines
IP Routing with IP/MPLS VPNs
Introduction to Routing for the Enterprise MPLS VPN
Implementing Routing Protocols
Network Topology
Addressing and Route Summarization
Route Selection
Convergence
Network Scalability
Memory
CPU
Security
Site Typifying WAN Access: Impact on Topology
Site Type: Topology
WAN Connectivity Standards
Site Type A Attached Sites: Dual CE and Dual PE
Site Type B/3 Dual-Attached Site -Single CE, Dual PE
Site Type B/3 Dual-Attached Site -Single CE, Single PE
Site Type D Single-Attached Site -Single CE with Backup
Convergence: Optimized Recovery
IP Addressing
Routing Between the Enterprise and the Service Provider
Using EIGRP Between the CE and PE
How EIGRP MPLS VPN PE-to-CE Works
PE Router: Non-EIGRP-Originated Routes
PE Router: EIGRP-Originated Internal Routes
PE Router: EIGRP-Originated Exter
Table of Contents provided by Publisher. All Rights Reserved.

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Selecting MPLS VPN Services

Summary

Author Biography

Table of Contents

Supplemental Materials