H3C Technologies H3C S7500E Series Switches - Manual (Page 326)

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[PE2-ospf-1-area-0.0.0.0]network 2.2.2.9 0.0.0.0
[PE2-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
[PE2-ospf-1-area-0.0.0.0]quit
[PE2-ospf-1]quit
3) Configure PEs to allow CEs to access the network
# Configure PE 1 to allow CE 1 to access the network.
[PE1] ip vpn-instance vpn1
[PE1-vpn-instance-vpn1] route-distinguisher 100:1
[PE1-vpn-instance-vpn1] vpn-target 1:1
[PE1-vpn-instance-vpn1] quit
[PE1] interface vlan-interface 12
[PE1-Vlan-interface12] ip binding vpn-instance vpn1
[PE1-Vlan-interface12] ip address 100.1.1.2 24
[PE1-Vlan-interface12] quit
[PE1] ospf 100 vpn-instance vpn1
[PE1-ospf-100] domain-id 10
[PE1-ospf-100] area 1
[PE1-ospf-100-area-0.0.0.1] network 100.1.1.0 0.0.0.255
[PE1-ospf-100-area-0.0.0.1] quit
[PE1-ospf-100] quit
[PE2] bgp 100
[PE1-bgp] ipv4-family vpn-instance vpn1
[PE1-bgp-vpn1] import-route ospf 100
[PE1-bgp-vpn1] import-route direct
[PE1-bgp-vpn1] quit
[PE1-bgp] quit
# Configure PE 2 to allow CE 2 to access the network.
[PE2] ip vpn-instance vpn1
[PE2-vpn-instance-vpn1] route-distinguisher 100:2
[PE2-vpn-instance-vpn1] vpn-target 1:1
[PE2-vpn-instance-vpn1] quit
[PE2] interface vlan-interface 11
[PE2-Vlan-interface11] ip binding vpn-instance vpn1
[PE2-Vlan-interface11] ip address 120.1.1.2 24
[PE2-Vlan-interface11] quit
[PE2] ospf 100 vpn-instance vpn1
[PE2-ospf-100] domain-id 10
[PE2-ospf-100] area 1
[PE2-ospf-100-area-0.0.0.1] network 120.1.1.0 0.0.0.255
[PE2-ospf-100-area-0.0.0.1] quit
[PE2-ospf-100] quit
[PE2] bgp 100
[PE2-bgp] ipv4-family vpn-instance vpn1
[PE2-bgp-vpn1] import-route ospf 100
[PE2-bgp-vpn1] import-route direct
[PE2-bgp-vpn1] quit
[PE2-bgp] quit
After completing the above configurations, if you issue the display ip routing-table vpn-instance
command on the PEs, you should see that the path to the peer CE is along the OSPF route across the
customer networks, instead of the BGP route across the backbone. Take PE 1 as an example: