Configuring Mpls L3Vpn; Overview; Basic Mpls L3Vpn Architecture; Mpls L3Vpn Concepts - HP FlexNetwork 10500 Series Configuration Manual

Configuring MPLS L3VPN

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 46 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 MPLS.
•
Provider edge device—A PE device resides at the edge of a service provider network and is
connected 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 CEs. A P device has only basic MPLS forwarding capability and does not
handle VPN routing information.

MPLS L3VPN concepts

Site
A site has the following features:
•
A site is a group of IP systems with IP connectivity that does not rely on any service provider
networks.
P
PE
P
P
PE
P
PE
185
VPN 2
Site 3
CE
CE
Site 4
VPN 1