Configuring OSPF pseudo connection for Huawei devices

1. stay CE1、AR6、CE2 Configure the normal on the OSPF, Publish the network segment address of each interface
   [CE1-GigabitEthernet0/0/0]ip add 10.1.1.4 24
   [CE1-GigabitEthernet0/0/1]ip add 40.1.1.4 24
   [CE1]ospf 1
   [CE1-ospf-1]area 0
   [CE1-ospf-1-area-0.0.0.0]network 10.1.1.0 0.0.0.255
   [CE1-ospf-1-area-0.0.0.0]network 40.1.1.0 0.0.0.255
   [AR6-GigabitEthernet0/0/1]ip add 40.1.1.6 24
   [AR6-GigabitEthernet0/0/2]ip add 50.1.1.6 24
   [AR6]ospf 1
   [AR6-ospf-1]area 0
   [AR6-ospf-1-area-0.0.0.0]network 40.1.1.0 0.0.0.255
   [AR6-ospf-1-area-0.0.0.0]network 50.1.1.0 0.0.0.255
   [CE2-GigabitEthernet0/0/0]ip add 10.2.1.5 24
   [CE2-GigabitEthernet0/0/1]ip add 50.1.1.5 24
   [CE2]ospf 1
   [CE2-ospf-1]area 0
   [CE2-ospf-1-area-0.0.0.0]network 10.2.1.0 0.0.0.255
   [CE2-ospf-1-area-0.0.0.0]network 50.1.1.0 0.0.0.255
2. stay PE、P Configure the basic of the backbone network on BGP/MPLS IP VPN, Include ： Configure the backbone network IGP; Configure the backbone network MPLS and LDP; stay PE Establish between MP-IBGP Peer relationship
   [PE1-LoopBack1]ip add 1.1.1.1 32
   [PE1-LoopBack10]ip add 5.5.5.5 32
   [PE1-GigabitEthernet0/0/0]ip add 20.1.1.1 24
   [PE1]mpls lsr-id 1.1.1.1
   [PE1]mpls
   [PE1]mpls ldp
   [PE1-GigabitEthernet0/0/0]mpls
   [PE1-GigabitEthernet0/0/0]mpls ldp
   [PE1]ospf 1 router-id 1.1.1.1
   [PE1-ospf-1]area 0
   [PE1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0
   [PE1-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
   [PE1]bgp 100
   [PE1-bgp]peer 3.3.3.3 as-number 100
   [PE1-bgp]peer 3.3.3.3 connect-interface LoopBack 1
   [PE1-bgp]ipv4-family vpnv4
   [PE1-bgp-af-vpnv4]peer 3.3.3.3 enable
   [P-LoopBack1]ip add 2.2.2.2 32
   [P]mpls lsr-id 2.2.2.2
   [P]mpls
   [P]mpls ldp
   [P-GigabitEthernet0/0/0]ip add 20.1.1.2 24
   [P-GigabitEthernet0/0/0]mpls
   [P-GigabitEthernet0/0/0]mpls ldp
   [P-GigabitEthernet0/0/1]ip add 30.1.1.2 24
   [P-GigabitEthernet0/0/1]mpls
   [P-GigabitEthernet0/0/1]mpls ldp
   [P]ospf 1 router-id 2.2.2.2
   [P-ospf-1]area 0
   [P-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
   [P-ospf-1-area-0.0.0.0]network 30.1.1.0 0.0.0.255
   [P-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
   [PE2-LoopBack1]ip add 3.3.3.3 32
   [PE2-LoopBack10]ip add 6.6.6.6 32
   [PE2]mpls lsr-id 3.3.3.3
   [PE2]mpls
   [PE2]mpls ldp
   [PE2-GigabitEthernet0/0/0]ip add 30.1.1.3 24
   [PE2-GigabitEthernet0/0/0]mpls
   [PE2-GigabitEthernet0/0/0]mpls ldp
   [PE2]ospf 1 router-id 3.3.3.3
   [PE2-ospf-1]area 0
   [PE2-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
   [PE2-ospf-1-area-0.0.0.0]network 30.1.1.0 0.0.0.255
   [PE2]bgp 100
   [PE2-bgp]peer 1.1.1.1 as-number 100
   [PE2-bgp]peer 1.1.1.1 connect-interface LoopBack 1
   [PE2-bgp]ipv4-family vpnv4
   [PE2-bgp-af-vpnv4]peer 1.1.1.1 enable
3. To configure PE And CE The connection of ：PE And CE Inter operation OSPF
   [PE1]ip vpn-instance vpn1
   [PE1-vpn-instance-vpn1]ipv4-family
   [PE1-vpn-instance-vpn1-af-ipv4]route-distinguisher 100:1
   [PE1-vpn-instance-vpn1-af-ipv4]vpn-target 1:1
   [PE1-GigabitEthernet0/0/1]ip binding vpn-instance vpn1
   [PE1-GigabitEthernet0/0/1]ip add 10.1.1.1 24
   [PE1]ospf 100 router-id 5.5.5.5 vpn-instance vpn1
   [PE1-ospf-100]domain-id 10
   [PE1-ospf-100]import-route bgp
   [PE1-ospf-100]area 0
   [PE1-ospf-100-area-0.0.0.0]network 10.1.1.0 0.0.0.255
   [PE1]bgp 100
   [PE1-bgp]ipv4-family vpn-instance vpn1
   [PE1-bgp-vpn1]import-route direct
   [PE1-bgp-vpn1]import-route ospf 100
   [PE2]ip vpn-instance vpn1
   [PE2-vpn-instance-vpn1]ipv4-family
   [PE2-vpn-instance-vpn1-af-ipv4]route-distinguisher 100:2
   [PE2-vpn-instance-vpn1-af-ipv4]vpn-target 1:1
   [PE2-GigabitEthernet0/0/1]ip binding vpn-instance vpn1
   [PE2-GigabitEthernet0/0/1]ip add 10.2.1.3 24
   [PE2]ospf 100 router-id 6.6.6.6 vpn-instance vpn1
   [PE2-ospf-100]import-route direct
   [PE2-ospf-100]import-route bgp
   [PE2-ospf-100]domain-id 10
   [PE2-ospf-100]area 0
   [PE2-ospf-100-area-0.0.0.0]network 10.2.1.0 0.0.0.255
   [PE2]bgp 100
   [PE2-bgp]ipv4-family vpn-instance vpn1
   [PE2-bgp-vpn1]import-route direct
   [PE2-bgp-vpn1]import-route ospf 100
   

See go to the opposite end CE Is routed through the user network OSPF route , Not through the backbone BGP route
4. Configure pseudo connection
[CE1-GigabitEthernet0/0/1]ospf cost 10
[CE2-GigabitEthernet0/0/1]ospf cost 10
[PE1]int LoopBack 10
[PE1-LoopBack10]ip binding vpn-instance vpn1
[PE1-LoopBack10]ip add 5.5.5.5 32
[PE1]ospf 100
[PE1-ospf-100]area 0
[PE1-ospf-100-area-0.0.0.0]sham-link 5.5.5.5 6.6.6.6 cost 1
[PE2]int LoopBack 10
[PE2-LoopBack10]ip binding vpn-instance vpn1
[PE2-LoopBack10]ip add 6.6.6.6 32
[PE2]ospf 100
[PE2-ospf-100]area 0
[PE2-ospf-100-area-0.0.0.0]sham-link 6.6.6.6 5.5.5.5 cost 1
5. Check the configuration

See go to the opposite end CE The route through the backbone network BGP route , And there are going to sham-link Destination address routing

See go to the opposite end CE Of OSPF The routing overhead becomes 3, The next hop is access PE Of g0/0/1 Interface , namely , Go to the opposite end VPN Traffic will be forwarded through the backbone

You can see the opposite end CE The routing of is as in the area （Intra Area） I learned