Configuring Mce; Mce Overview; Mpls L3Vpn Overview - HP 10500 Series Configuration Manual

Configuring MCE

This chapter covers Multi-VPN-Instance CE (MCE) configuration only. For information about routing
protocols, see Layer 3—IP Services Configuration Guide.

MCE overview

MPLS L3VPN overview

MPLS L3VPN is a PE-based L3VPN technology. It uses BGP to advertise VPN routes and uses MPLS to
forward VPN packets over the service provider backbone.
MPLS L3VPN provides flexible networking modes, excellent scalability, and convenient support for MPLS
QoS and MPLS TE.
MPLS L3VPN comprises the following types of devices:
• Customer edge (CE) device—A CE resides at the edge of a customer network and has one or more
interfaces directly connected to a service provider network. It can be a router, a switch, or a host.
It can neither "sense" the presence of any VPN nor does it need to support MPLS.
Provider edge (PE) device—A PE resides at the edge of a service provider network and connects
•
one or more CEs. On an MPLS network, all VPN services are processed on the PEs.
Provider (P) device—A P device is a core device on a service provider network. It is not directly
•
connected to any CE. It has only basic MPLS forwarding capability.
Figure 1 Network diagram for MPLS L3VPN
VPN 1
Site 1
CE
CE
Site 2
VPN 2
CEs and PEs mark the boundary between the service provider network and the customers.
After a CE establishes an adjacency with a directly connected PE, it advertises its VPN routes to the PE
and learns remote VPN routes from the PE. A CE and a PE can use BGP, an IGP, or static routing to
exchange routing information.
P
PE
P
P
PE
P
PE
1
VPN 2
Site 3
CE
CE
Site 4
VPN 1