Huawei quidway s7700 - Page 261

Figure 3-12 Networking diagram for configuring the OSPF sham link
CE2
PE1
PE2
CE1
sham link
GE2/0/0
GE2/0/0
GE1/0/0
GE2/0/0 GE2/0/0
GE1/0/0 GE1/0/0
GE1/0/0
Loopback1
1.1.1.9/32
Loopback1
3.3.3.9/32
Loopback10
6.6.6.6/32
GE1/0/0 GE2/0/0
Switch
P
Loopback1
2.2.2.9/32
GE1/0/0
GE2/0/0
backdoor
Loopback10
5.5.5.5/32
Device Interface VLANIF interface IP address
PE1 GigabitEthernet1/0/0 VLANIF 50 100.1.1.2/24
GigabitEthernet2/0/0 VLANIF 10 10.1.1.1/24
PE2 GigabitEthernet1/0/0 VLANIF 60 120.1.1.2/24
GigabitEthernet2/0/0 VLANIF 40 40.1.1.2/24
P GigabitEthernet1/0/0 VLANIF 10 10.1.1.2/24
GigabitEthernet2/0/0 VLANIF 40 40.1.1.1/24
CE1 GigabitEthernet1/0/0 VLANIF 50 100.1.1.1/24
GigabitEthernet2/0/0 VLANIF 20 20.1.1.1/24
CE2 GigabitEthernet1/0/0 VLANIF 60 120.1.1.1/24
GigabitEthernet2/0/0 VLANIF 30 30.1.1.2/24
Switch GigabitEthernet1/0/0 VLANIF 20 20.1.1.2/24
GigabitEthernet2/0/0 VLANIF 30 30.1.1.1/24
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.
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.
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