Mpls L3Vpn Benefits; How Mpls L3Vpn Works - Cisco CRS Configuration Manual

Implementing MPLS Layer 3 VPNs
This following figures shows a basic MPLS VPN topology.
Figure 27: Basic MPLS VPN Topology

MPLS L3VPN Benefits

MPLS L3VPN provides the following benefits:
• Service providers can deploy scalable VPNs and deliver value-added services.
• Connectionless service guarantees that no prior action is necessary to establish communication between
• Centralized Service: Building VPNs in Layer 3 permits delivery of targeted services to a group of users
• Scalability: Create scalable VPNs using connection-oriented, point-to-point overlays, Frame Relay, or
• Security: Security is provided at the edge of a provider network (ensuring that packets received from a
• Integrated Quality of Service (QoS) support: QoS provides the ability to address predictable performance
• Straightforward Migration: Service providers can deploy VPN services using a straightforward migration
• Migration for the end customer is simplified. There is no requirement to support MPLS on the CE router

How MPLS L3VPN Works

MPLS VPN functionality is enabled at the edge of an MPLS network. The PE router performs the following
tasks:
hosts.
represented by a VPN.
ATM virtual connections.
customer are placed on the correct VPN) and in the backbone.
and policy implementation and support for multiple levels of service in an MPLS VPN.
path.
and no modifications are required for a customer intranet.
Cisco IOS XR Virtual Private Network Configuration Guide for the Cisco CRS Router, Release 6.1.x
MPLS L3VPN Benefits
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