Huawei equipment is configured with cross domain virtual private network

1. Configure interface IP Address
   [ASBR-PE1-LoopBack0]ip add 1.1.1.1 32
   [ASBR-PE1-GigabitEthernet0/0/0]ip add 12.1.1.1 24
   [ASBR-PE1-GigabitEthernet0/0/1]ip add 20.1.1.1 24
   [ASBR-PE2-LoopBack0]ip add 2.2.2.2 32
   [ASBR-PE2-GigabitEthernet0/0/0]ip add 12.1.1.2 24
   [ASBR-PE2-GigabitEthernet0/0/1]ip add 30.1.1.2 24
   [PE1-LoopBack0]ip add 3.3.3.3 32
   [PE1-GigabitEthernet0/0/0]ip add 20.1.1.3 24
   [PE1-GigabitEthernet0/0/1]ip add 10.1.1.3 24
   [PE2-LoopBack0]ip add 4.4.4.4 32
   [PE2-GigabitEthernet0/0/0]ip add 30.1.1.4 24
   [PE2-GigabitEthernet0/0/1]ip add 10.2.1.4 24
   [CE1-GigabitEthernet0/0/0]ip add 10.1.1.5 24
   [CE2-GigabitEthernet0/0/0]ip add 10.2.1.6 24

2. stay AS100 and AS200 Of MPLS The backbone network is configured separately OSPF agreement , Realize respective backbone network ASBR-PE and PE Interworking between
   [ASBR-PE1]ospf 1
   [ASBR-PE1-ospf-1]area 0
   [ASBR-PE1-ospf-1-area-0.0.0.0]network 12.1.1.0 0.0.0.255
   [ASBR-PE1-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
   [ASBR-PE1-ospf-1-area-0.0.0.0]network 1.1.1.1 0.0.0.0
   [ASBR-PE2]ospf 1
   [ASBR-PE2-ospf-1]area 0
   [ASBR-PE2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
   [ASBR-PE2-ospf-1-area-0.0.0.0]network 30.1.1.0 0.0.0.255
   [ASBR-PE2-ospf-1-area-0.0.0.0]network 12.1.1.0 0.0.0.255
   [PE1]ospf 1
   [PE1-ospf-1]area 0
   [PE1-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
   [PE1-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
   [PE2]ospf 1
   [PE2-ospf-1]area 0
   [PE2-ospf-1-area-0.0.0.0]network 4.4.4.4 0.0.0.0
   [PE2-ospf-1-area-0.0.0.0]network 30.1.1.0 0.0.0.255

3. stay AS100 and AS200 Of MPLS The backbone network is configured separately MPLS Basic abilities and MPLS LDP, establish LDP LSP
   [ASBR-PE1]mpls lsr-id 1.1.1.1
   [ASBR-PE1]mpls
   [ASBR-PE1-mpls]label advertise non-null
   [ASBR-PE1]mpls ldp
   [ASBR-PE1-GigabitEthernet0/0/1]mpls
   [ASBR-PE1-GigabitEthernet0/0/1]mpls ldp
   [ASBR-PE2]mpls lsr-id 2.2.2.2
   [ASBR-PE2]mpls
   [ASBR-PE2-mpls]label advertise non-null
   [ASBR-PE2]mpls ldp
   [ASBR-PE2-GigabitEthernet0/0/1]mpls
   [ASBR-PE2-GigabitEthernet0/0/1]mpls ldp
   [PE1]mpls lsr-id 3.3.3.3
   [PE1]mpls
   [PE1-mpls]label advertise non-null
   [PE1]mpls ldp
   [PE1-GigabitEthernet0/0/0]mpls
   [PE1-GigabitEthernet0/0/0]mpls ldp
   [PE2]mpls lsr-id 4.4.4.4
   [PE2]mpls
   [PE2-mpls]label advertise non-null
   [PE2]mpls ldp
   [PE2-GigabitEthernet0/0/0]mpls
   [PE2-GigabitEthernet0/0/0]mpls ldp
   
   

4. PE And ASBR-PE Establish between MP-IBGP Peer relationship , In exchange for VPN Routing information
   [ASBR-PE1]bgp 100
   [ASBR-PE1-bgp]peer 3.3.3.3 as-number 100
   [ASBR-PE1-bgp]peer 3.3.3.3 connect-interface LoopBack 0
   [ASBR-PE1-bgp]ipv4-family vpnv4
   [ASBR-PE1-bgp-af-vpnv4]peer 3.3.3.3 enable
   [PE1]bgp 100
   [PE1-bgp]peer 1.1.1.1 as-number 100
   [PE1-bgp]peer 1.1.1.1 connect-interface LoopBack 0
   [PE1-bgp]ipv4-family vpnv4
   [PE1-bgp-af-vpnv4]peer 1.1.1.1 enable
   [ASBR-PE2]bgp 200
   [ASBR-PE2-bgp]peer 4.4.4.4 as-number 200
   [ASBR-PE2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
   [ASBR-PE2-bgp]ipv4-family vpnv4
   [ASBR-PE2-bgp-af-vpnv4]peer 4.4.4.4 enable
   [PE2]bgp 200
   [PE2-bgp]peer 2.2.2.2 as-number 200
   [PE2-bgp]peer 2.2.2.2 connect-interface LoopBack 0
   [PE2-bgp]ipv4-family vpnv4
   [PE2-bgp-af-vpnv4]peer 2.2.2.2 enable

5. stay PE Configure enable on the device IPv4 Address family VPN example , take CE Access PE
   [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 both
   [PE1-GigabitEthernet0/0/1]ip binding vpn-instance vpn1
   [PE1-GigabitEthernet0/0/1]ip add 10.1.1.3 24
   [PE2]ip vpn-instance vpn1
   [PE2-vpn-instance-vpn1]ipv4-family
   [PE2-vpn-instance-vpn1-af-ipv4]route-distinguisher 200:1
   [PE2-vpn-instance-vpn1-af-ipv4]vpn-target 2:2 both
   [PE2-GigabitEthernet0/0/1]ip binding vpn-instance vpn1
   [PE2-GigabitEthernet0/0/1]ip add 10.2.1.4 24

6. To configure PE And CE establish EBGP Peer relationship , In exchange for VPN route
   [CE1]bgp 65001
   [CE1-bgp]peer 10.1.1.3 as-number 100
   [CE1-bgp]import-route direct
   [PE1]bgp 100
   [PE1-bgp]ipv4-family vpn-instance vpn1
   [PE1-bgp]peer 10.1.1.5 as-number 65001
   [PE1-bgp]import-route direct
   

[CE2]bgp 65002
[CE2-bgp]peer 10.2.1.4 as-number 200
[CE2-bgp]import-route direct
[PE2]bgp 200
[PE2-bgp]ipv4-family vpn-instance vpn1
[PE2-bgp-vpn1]peer 10.2.1.6 as-number 65002
[PE2-bgp-vpn1]import-route direct

7. To configure OptionA The way of cross domain VPN
   [ASBR-PE1]ip vpn-instance vpn1
   [ASBR-PE1-vpn-instance-vpn1]ipv4-family
   [ASBR-PE1-vpn-instance-vpn1-af-ipv4]route-distinguisher 100:2
   [ASBR-PE1-vpn-instance-vpn1-af-ipv4]vpn-target 1:1 both
   [ASBR-PE1-GigabitEthernet0/0/0]ip binding vpn-instance vpn1
   [ASBR-PE1-GigabitEthernet0/0/0]ip add 12.1.1.1 24
   [ASBR-PE2]ip vpn-instance vpn1
   [ASBR-PE2-vpn-instance-vpn1]ipv4-family
   [ASBR-PE2-vpn-instance-vpn1-af-ipv4]route-distinguisher 200:2
   [ASBR-PE2-vpn-instance-vpn1-af-ipv4]vpn-target 2:2
   [ASBR-PE2-GigabitEthernet0/0/0]ip binding vpn-instance vpn1
   [ASBR-PE2-GigabitEthernet0/0/0]ip add 12.1.1.2 24
   [ASBR-PE1]bgp 100
   [ASBR-PE1-bgp]ipv4-family vpn-instance vpn1
   [ASBR-PE1-bgp-vpn1]peer 12.1.1.2 as-number 200
   [ASBR-PE1-bgp-vpn1]import-route direct
   [ASBR-PE2]bgp 200
   [ASBR-PE2-bgp]ipv4-family vpn-instance vpn1
   [ASBR-PE2-bgp-vpn1]peer 12.1.1.1 as-number 100
   [ASBR-PE2-bgp-vpn1]import-route direct
8. Check the configuration