Figure 3-10 Networking of the inter-AS VPN
PE2
ASBR2
BGP/MPLS Backbone
AS 200
ASBR1
PE1
BGP/MPLS Backbone
AS 100
GE2/0/0
10.1.1.2/24
Loopback1
1.1.1.9/32
GE1/0/0
172.1.1.2/24
GE2/0/0
192.1.1.1/24
Loopback1
2.2.2.9/32
172.1.1.1/24
Loopback1
3.3.3.9/32
GE1/0/0
162.1.1.1/24
GE1/0/0
162.1.1.2/24
Loopback1
4.4.4.9/32
GE2/0/0
10.2.1.2/24
CE1
AS 65001
CE2
AS 65002
GE1/0/0
10.1.1.1/24
GE1/0/0
10.2.1.1/24
GE2/0/0
192.1.1.2/24
GE1/0/0
VLAN IF12
VLANIF 10
VLANIF 10
VLANIF 10
VLANIF 10
VLANIF 11
VLANIF 11
VLANIF 22
VLANIF 22
VLAN IF12
Configuration Roadmap
The configuration roadmap is as follows:
1. Run IGP on the backbone network to implement the communication between ASBRs and
PEs in the same AS. Set up MPLS LDP LSPs between ASBRs and PEs in the same AS.
2. Set up EBGP peer relationships between PEs and CEs and set up MP-IBGP peer
relationships between PEs and ASBRs.
3. Create VPN instances on PEs (you do not need to create VPN instances on ASBRs.)
4. Enable MPLS on the interface that connect ASBR1 and ASBR2, set up the MP-EBGP peer
relationship between ASBRs, and configure the ASBRs not to filter the received VPNv4
routes based on the VPN target.
Data Preparation
To complete the configuration, you need the following data:
l MPLS LSR IDs of PEs and ASBRs
l Names, RDs, and VPN targets of the VPN instances created on PE1 and PE2
Procedure
Step 1 On the MPLS backbone networks in AS100 and AS200, configure IGP to implement
communication between PEs on the respective backbone network.
Quidway S7700 Smart Routing Switch
Configuration Guide - VPN 3 BGP MPLS IP VPN Configuration
Issue 01 (2011-07-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
231
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