R2511-HP MSR Router Series MPLS Configuration Guide(V5)

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Configuring MPLS L3VPNs using IBGP between a PE and a CE
Network requirements
CE 1 and CE 3 belong to VPN 1. CE 2 and CE 4 belong to VPN 2.
VPN 1 uses route target attribute 111:1. VPN 2 uses route target attribute 222:2. Users of different VPNs
cannot access each other.
IBGP is used to exchange VPN routing information between CE and PE.
PEs use OSPF to communicate with each other and use MP-IBGP to exchange VPN routing information.
Figure 58 Network diagram
Device Interface IP address Device Interface IP address
PE 1 Loop0 1.1.1.9/32 PE 2 Loop0 3.3.3.9/32
Eth1/1 10.1.1.2/24 Eth1/1 10.3.1.2/24
Eth1/2 10.2.1.2/24 Eth1/2 10.4.1.2/24
POS5/0 172.1.1.1/24 POS5/0 172.2.1.2/24
CE 1 Loop0 4.4.4.9/32 P Loop0 2.2.2.9/32
Eth1/1 10.1.1.1/24 POS5/0 172.1.1.2/24
CE 2 Loop0 5.5.5.9/32 POS5/1 172.2.1.1/24
Eth1/1 10.2.1.1/24 CE 4 Loop0 7.7.7.9/32
CE 3 Loop0 6.6.6.9/32 Eth1/1 10.4.1.1/24
Eth1/1 10.3.1.1/24
Configuration procedure
1. Configure an IGP on the MPLS backbone to ensure IP connectivity within the backbone:
# Configure PE 1.
<PE1> system-view
[PE1] interface loopback 0
[PE1-LoopBack0] ip address 1.1.1.9 32
[PE1-LoopBack0] quit
CE 1
Loop0
Loop0 Loop0
PE 1
PE 2
Eth1/1
Eth1/1
Eth1/2
Eth1/1
POS5/0
Eth1/1
Eth1/2
Eth1/1
Eth1/1
CE 3
CE 2
CE 4
POS5/0 POS5/1
POS5/0
VPN 1
VPN 1
VPN 2
VPN 2
MPLS backbone
AS 100 AS 100
AS 100
AS 100
P
Loop0
Loop0 Loop0
Loop0