Bgp/Mpls Vpn Model - 3Com 3C13636 Configuration Manual

Router 3000 ethernet family

Hide thumbs Also See for 3C13636:

Table of Contents

3Com Router 3000 Ethernet Family

Configuration Guide

3.1.1 BGP/MPLS VPN Model

I. BGP/MPLS VPN model

Figure 3-1 MPLS VPN model

As shown in Figure 3-1, MPLS VPN model contains three parts: CE, PE and P.

CE (Customer Edge) device: It is a composing part of the customer network, which

is usually connected with the service provider directly via an interface. It is

commonly a router. CE cannot "sense" the existence of VPN.

PE (Provider Edge) router: It is the Provider Edge router, namely the edge device

of the provider network, which is connected with the customer's CE directly. In

MPLS network, PE router disposes all the processing for VPN.

P (Provider) router: It is the backbone router in the provider network, which is not

connected with CE directly. P router needs to possess MPLS basic forwarding

The classification of CE and PE mainly depends on the range for the management of

the provider and the customer, and CE and PE are the edges of the management

II. Basic concepts in BGP/MPLS VPN

vpn-instance

vpn-instance is an important concept in VPN routing in MPLS. In actual network, each

site on PE corresponds to a single vpn-instance (their association is implemented via

interface binding). If subscribers on one site belong to multiple VPNs, then the

corresponding vpn-instance should include information about all these VPNs.

Specifically, such information should be included in vpn-instance: label forwarding table,

IP routing table, the interfaces bound with vpn-instance, and the management

Backbone network of

the service provider

3Com Corporation

Chapter 3 BGP/MPLS VPN Configuration

Table of Contents

3c13636-us - router 3036 3000 series