Figure 3-10 Networking diagram of example for Multi-VPN-Instance CE
CE1
CE2
CE4
CE3
MCE
PE1
PE2
Loopback1
2.2.2.9/32
Eth1/0/0
10.1.1.1/24
Eth1/0/0
10.1.1.2/24
Eth2/0/0
10.2.1.2/24
Eth1/0/0
10.2.1.1/24
Eth2/0/1
172.1.1.1/24
Eth1/0/0
172.1.1.2/24
Eth2/0/0
192.1.1.1/24
Eth2/0/0
192.2.1.2/24
Eth2/0/1
192.2.1.1/24
Eth1/0/0
192.1.1.2/24
Loopback1
1.1.1.9/32
vpna
vpnb
vpna
vpnb
vpna
vpnb
Eth2/0/1
10.3.1.2/24
Eth1/0/0
10.3.1.1/24
Eth1/0/1
10.4.1.2/24
Eth1/0/0
10.4.1.1/24
Configuration Roadmap
The configuration roadmap is as follows:
1. Configure OSPF between the PEs. Configure the MP-IBGP for PEs to distribute VPN
routes learnt from CEs to each other.
2. Set up EBGP peer relationship between the PE and the connected CE to import the VPN
routes to the VPN routing table of the PE.
3. Configure the OSPF multi-instance between MCE and PE2 to exchange VPN routes.
Configure RIPv2 between MCE and CE3 to exchange VPN routes. Configure RIPv2
between MCE and CE4 to exchange VPN routes.
NOTE
When configuring OSPF multi-instance between MCE and PE2, configure as follows:
l In the OSPF view of the PE2, (This OSPF process refers to the process used for the configuration of
OSPF multi-instance) import the BGP route. Therefore, the MCE obtains the VPN routes that PE1 has
learned from CE1 or CE2.
l Import the OSPF routes (This OSPF process refers to the process used by the configuration of OSPF
multi-instance) in the BGP view of PE2. In this way, PE1 obtains the VPN route from the MCE.
Data Preparation
To complete this configuration, prepare the following data:
l A VPN instance for each isolated service is created on PE1, PE2 and MCE. Set the name,
the RD and the VPN target for these VPN instances. Note that, VPN targets of different
VPN instances differ from each other. The VPN targets of the same VPN instance are
matched.
l For different OSPF multi-instances, the OSPF process numbers must be different.
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.
217
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