Configuration Roadmap
The configuration roadmap is as follows:
1. Set up an MP-IBGP adjacency between the PEs and enable OSPF between the PE and CEs.
2. Create VPN instances on the PEs and bind the instances to the interfaces connected to the
CEs.
3. Create an OSPF sham link between the PEs.
4. Adjust the cost value of the backdoor link of the VPN to be greater than that of the sham
link.
Data Preparation
To complete the configuration, you need the following data:
l MPLS LSR-IDs of PE and P
l Name of the VPN instance, RD, and VPN target on the PE
l OSPF processes running on the interior of the backbone network and user networks, which
are different from that running on the PEs connected to CEs
l Cost of the sham link, which must be less than the cost for forwarding OSPF routes through
the user network
Procedure
Step 1 Configure OSPF on the user network.
Configure common OSPF on CE1, S9300-A and CE2 and advertise the segment address of each
interface.
# Configure CE1.
<Quidway> system-view
[Quidway] sysname CE1
[CE1] vlan batch 20 50
[CE1] interface GigabitEthernet 2/0/0
[CE1-GigabitEthernet2/0/0] port hybrid pvid vlan 20
[CE1-GigabitEthernet2/0/0] port hybrid untagged vlan 20
[CE1-GigabitEthernet2/0/0] quit
[CE1] interface GigabitEthernet 1/0/0
[CE1-GigabitEthernet1/0/0] port hybrid pvid vlan 50
[CE1-GigabitEthernet1/0/0] port hybrid untagged vlan 50
[CE1-GigabitEthernet1/0/0] quit
[CE1] interface vlanif 20
[CE1-Vlanif20] ip address 20.1.1.1 24
[CE1-Vlanif20] quit
[CE1] interface vlanif 50
[CE1-Vlanif50] ip address 100.1.1.1 24
[CE1-Vlanif50] quit
[CE1] ospf
[CE1-ospf-1] area 0
[CE1-ospf-1-area-0.0.0.0] network 20.1.1.0 0.0.0.255
[CE1-ospf-1-area-0.0.0.0] network 100.1.1.0 0.0.0.255
[CE1-ospf-1-area-0.0.0.0] quit
[CE1-ospf-1] quit
# Configure S9300-A.
<Quidway> system-view
[Quidway] sysname S9300-A
[S9300-A] vlan 20 30
3 BGP/MPLS IP VPN Configuration
Quidway S9300 Terabit Routing Switch
Configuration Guide - VPN
3-116 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 03 (2009-08-20)
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