H3C Technologies H3C S6800 Series Switches - Manual (Page 275)

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[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] ip vpn-instance vpn1
[PE2-bgp-vpn1] address-family ipv4 unicast
[PE2-bgp-ipv4-vpn1] import-route ospf 100
[PE2-bgp-ipv4-vpn1] import-route direct
[PE2-bgp-ipv4-vpn1] quit
[PE2-bgp-vpn1] quit
[PE2-bgp] quit
# Execute the display ip routing-table vpn-instance command on the PEs to verify that the path to
the peer CE is along the OSPF route across the customer networks, instead of the BGP route across
the backbone. (Details not shown.)
4. Configure a sham link:
# Configure PE 1.
[PE1] interface loopback 1
[PE1-LoopBack1] ip binding vpn-instance vpn1
[PE1-LoopBack1] ip address 3.3.3.3 32
[PE1-LoopBack1] quit
[PE1] ospf 100
[PE1-ospf-100] area 1
[PE1-ospf-100-area-0.0.0.1] sham-link 3.3.3.3 5.5.5.5 cost 10
[PE1-ospf-100-area-0.0.0.1] quit
[PE1-ospf-100] quit
# Configure PE 2.
[PE2] interface loopback 1
[PE2-LoopBack1] ip binding vpn-instance vpn1
[PE2-LoopBack1] ip address 5.5.5.5 32
[PE2-LoopBack1] quit
[PE2] ospf 100
[PE2-ospf-100] area 1
[PE2-ospf-100-area-0.0.0.1] sham-link 5.5.5.5 3.3.3.3 cost 10
[PE2-ospf-100-area-0.0.0.1] quit
[PE2-ospf-100] quit
Verifying the configuration
# Execute the display ip routing-table vpn-instance command on the PEs to verify the following results:
(Details not shown.)
• The path to the peer CE is now along the BGP route across the backbone.
• A route to the sham link destination address is present.
# Execute the display ip routing-table command on the CEs to verify that the next hop of the OSPF route
to the peer CE is the VLAN interface 11 connected to the PE. The VPN traffic to the peer is forwarded over
the backbone. (Details not shown.)
# Verify that a sham link has been established on PEs, for example, on PE 1.
[PE1] display ospf sham-link