Configuring Mpls L3Vpn; Overview; Basic Mpls L3Vpn Architecture - HP 6127xlg Configuration Manual

Configuring MPLS L3VPN

This chapter describes MPLS L3VPN configuration.

Overview

MPLS L3VPN is a L3VPN technology used to interconnect geographically dispersed VPN sites. MPLS
L3VPN uses BGP to advertise VPN routes and uses MPLS to forward VPN packets over a service provider
backbone.
MPLS L3VPN provides flexible networking modes, excellent scalability, and convenient support for MPLS
QoS and MPLS TE.

Basic MPLS L3VPN architecture

Figure 40 Basic MPLS L3VPN architecture
VPN 1
Site 1
CE
CE
Site 2
VPN 2
A basic MPLS L3VPN architecture has the following types of devices:
Customer edge device—A CE device resides on a customer network and has one or more interfaces
•
directly connected to a service provider network. It does not support VPN or MPLS.
Provider edge device—A PE device resides at the edge of a service provider network and connects
•
to one or more CEs. All MPLS VPN services are processed on PEs.
• Provider device—A P device is a core device on a service provider network. It is not directly
connected to any CE. A P device has only basic MPLS forwarding capability and does not handle
VPN routing information.
P
PE
P
P
PE
P
PE
161
VPN 2
Site 3
CE
CE
Site 4
VPN 1