240
PEs use OSPF to communicate with each other and use MP-IBGP to exchange VPN routing
information.
Figure 71 Network diagram
Table 13 Interface and IP address assignment
Device
Interface
IP address
Device
Interface
IP address
CE 1
GE1/1/1
10.1.1.1/24 P Loop0
2.2.2.9/32
PE 1
Loop0
1.1.1.9/32
POS1/1/0 172.1.1.2/24
GE1/1/1
10.1.1.2/24
POS1/1/1 172.2.1.1/24
GE1/1/2
10.2.1.2/24
PE
2 Loop0
3.3.3.9/32
POS1/1/0
172.1.1.1/24
GE1/1/1
10.3.1.2/24
CE 2
GE1/1/1
10.2.1.1/24
GE1/1/2
10.4.1.2/24
CE 3
GE1/1/1
10.3.1.1/24
POS1/1/0
172.2.1.2/24
CE
4
GE1/1/1
10.4.1.1/24
Configuration procedure
1.
Configure OSPF 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
[PE1] interface pos 1/1/0
[PE1-Pos1/1/0] ip address 172.1.1.1 24
[PE1-Pos1/1/0] quit
[PE1] ospf
[PE1-ospf-1] area 0
[PE1-ospf-1-area-0.0.0.0] network 172.1.1.0 0.0.0.255
[PE1-ospf-1-area-0.0.0.0] network 1.1.1.9 0.0.0.0