You can configure MP-IBGP to exchange routes between PEs. To exchange routes between the
PE and CE, you can configure static routes, RIP multi-instance, OSPF multi-instance, IS-IS
multi-instance, or BGP based on the specific networking situations.
NOTE
If a VPN is used to receive the external routes and the routes advertised by non-PE devices, and advertise
these routes to PEs, the VPN is called a transit VPN.
If a VPN is used to accept the internal routes and the routes advertised by PEs, the VPN is called a stub
VPN. In most cases, the static route is only used to exchange routes between the PE and CE in the stub
VPN.
Pre-configuration Tasks
Before configuring basic BGP/MPLS IP VPN, complete the following tasks:
l Configuring IGP for the MPLS backbone network (PE, P) to implement IP connectivity
l Configuring basic MPLS functions and MPLS LDP for the MPLS backbone network (PE,
P)
l Configuring tunnels between PEs based on the tunnel policy
l Configuring the IP address for the CE interface that is connected to the PE
Data Preparation
To configure basic BGP/MPLS IP VPN, you need the following data.
No.
Data
1 Data for configuring a VPN instance:
l Name of the VPN instance
l (Optional) Description of the VPN instance
l RD, VPN target attribute of the VPN instance IPv4 address families
l (Optional) Routing policy used to control the sending and receiving of VPN routes
l (Optional) Tunnel policy
l (Optional) Maximum number of routes permitted in a VPN instance IPv4 address
family
2
IP address of the PE interface that is connected to the CE
3 Route-exchanging mode between the PE and CE, which can be the static route, RIP,
OSPF, IS-IS, or BGP
4 AS number of the PE
5 IP address and interface of the PE used to establish the BGP peer relationship
3.4.2 Configuring a VPN Instance
This section describes how to configure a VPN instance to manage VPN routes.
Huawei AR1200 Series Enterprise Routers
Configuration Guide - VPN 3 BGP MPLS IP VPN Configuration
Issue 01 (2012-04-20) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
71
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