H3C Technologies H3C S12500-X Series Switches - Manual (Page 156)

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255.255.255.255/32 Direct 0 0 127.0.0.1 InLoop0
# CEs of the same VPN can ping each other, whereas those of different VPNs cannot. For example, CE
1 can ping CE 3 (10.3.1.1) but cannot ping CE 4 (10.4.1.1).
Configuring a hub-spoke network
Network requirements
The Spoke-CEs cannot communicate directly. They can communicate only through Hub-CE.
Configure EBGP between the Spoke-CEs and Spoke-PEs and between Hub-CE and Hub-PE to exchange
VPN routing information.
Configure OSPF between the Spoke-PEs and Hub-PE to implement communication between the PEs, and
configure MP-IBGP between them to exchange VPN routing information.
Figure 48 Network diagram
Device Interface IP address Device Interface IP address
Spoke-CE 1 Vlan-int2 10.1.1.1/24 Hub-CE Vlan-int6 10.3.1.1/24
Spoke-PE 1 Loop0 1.1.1.9/32 Vlan-int7 10.4.1.1/24
Vlan-int2 10.1.1.2/24 Hub-PE Loop0 2.2.2.9/32
Vlan-int4 172.1.1.1/24 Vlan-int4 172.1.1.2/24
Spoke-CE 2 Vlan-int3 10.2.1.1/24 Vlan-int5 172.2.1.2/24
Spoke-PE 2 Loop0 3.3.3.9/32 Vlan-int6 10.3.1.2/24
Vlan-int3 10.2.1.2/24 Vlan-int7 10.4.1.2/24
Vlan-int5 172.2.1.1/24
Configuration procedure
1. Configure an IGP on the MPLS backbone to ensure IP connectivity within the backbone:
# Configure Spoke-PE 1.
<Spoke-PE1> system-view
[Spoke-PE1] interface loopback 0
[Spoke-PE1-LoopBack0] ip address 1.1.1.9 32