Huawei equipment configuration BGP as number replacement

1. P、PE Configuration between OSPF, Realize the backbone network IP Connectivity
   [PE1-LoopBack1]ip add 1.1.1.1 32
   [PE1-GigabitEthernet0/0/0]ip add 20.1.1.1 24
   [PE1]ospf 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
   [PE2-LoopBack1]ip add 3.3.3.3 32
   [PE2-GigabitEthernet0/0/0]ip add 30.1.1.3 24
   [PE2]ospf 1
   [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
   [P-LoopBack1]ip add 2.2.2.2 32
   [P-GigabitEthernet0/0/0]ip add 20.1.1.2 24
   [P-GigabitEthernet0/0/1]ip add 30.1.1.2 24
   [P]ospf 1
   [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 20.1.1.0 0.0.0.255
   [P-ospf-1-area-0.0.0.0]network 30.1.1.0 0.0.0.255
2. PE、P On the configuration MPLS Basic abilities and MPLS LDP, establish MPLS LSP Public network tunnel , transmission VPN data
   [PE1]mpls lsr-id 1.1.1.1
   [PE1]mpls
   [PE1]mpls ldp
   [PE1-GigabitEthernet0/0/0]mpls
   [PE1-GigabitEthernet0/0/0]mpls ldp
   [PE2]mpls lsr-id 3.3.3.3
   [PE2]mpls
   [PE2]mpls ldp
   [PE2-GigabitEthernet0/0/0]mpls
   [PE2-GigabitEthernet0/0/0]mpls ldp
   [P]mpls lsr-id 2.2.2.2
   [P]mpls
   [P]mpls ldp
   [P-GigabitEthernet0/0/0]mpls
   [P-GigabitEthernet0/0/0]mpls ldp
   [P-GigabitEthernet0/0/1]mpls
   [P-GigabitEthernet0/0/1]mpls ldp
3. PE Establish between MP-IBGP Peer relationship , Release VPNv4 route
   [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
   [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
4. PE1 and PE2 On the configuration VPN example ,VPN-target Attributes are all 1:1, In order to realize the VPN Intercommunication . meanwhile , And CE Connected interfaces and corresponding VPN Instance binding , To access VPN user
   [PE1]ip vpn-instance vpn1
   [PE1-vpn-instance-vpn1]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
   [PE2]ip vpn-instance vpn1
   [PE2-vpn-instance-vpn1]route-distinguisher 200:1
   [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
5. PE and CE Establish between EBGP Relationship , take CE Routing is introduced into PE in
   [CE1-GigabitEthernet0/0/0]ip add 10.1.1.4 24
   [CE1-GigabitEthernet0/0/1]ip add 192.168.1.4 24
   [CE1]bgp 600
   [CE1-bgp]peer 10.1.1.1 as-number 100
   [CE1-bgp]import-route direct
   [CE2-GigabitEthernet0/0/0]ip add 10.2.1.5 24
   [CE2-GigabitEthernet0/0/1]ip add 192.168.2.5 24
   [CE2]bgp 600
   [CE2-bgp]peer 10.2.1.3 as-number 100
   [CE2-bgp]import-route direct
   [PE1]bgp 100
   [PE1-bgp]ipv4-family vpn-instance vpn1
   [PE1-bgp-vpn1]peer 10.1.1.4 as-number 600
   [PE1-bgp-vpn1]import-route direct
   [PE2]bgp 100
   [PE2-bgp]ipv4-family vpn-instance vpn1
   [PE2-bgp-vpn1]peer 10.2.1.5 as-number 600
   [PE2-bgp-vpn1]import-route direct
   
   

notice CE2 Be able to learn CE1 Access PE1 The network segment of the interface （10.1.1.0/24） The routing , But it didn't arrive CE1 Inside VPN（192.168.1.0/24） The routing .CE1 The same phenomenon also exists in

notice PE Of VPN The instance has reached the opposite end CE Inside VPN The routing

notice CE2 Did not receive 192.168.1.0/24 The routing
6. PE On the configuration BGP Of AS No. replacement function , To be able to receive AS Route with the same number , complete VPN Routing Exchange
[PE2]bgp 100
[PE2-bgp]ipv4-family vpn-instance vpn1
[PE2-bgp-vpn1]peer 10.2.1.5 substitute-as

notice PE2 towards CE2 Published route ,192.168.1.0/24 Of AS Path information is “100 100”
[PE1]bgp 100
[PE1-bgp]ipv4-family vpn-instance vpn1
[PE1-bgp-vpn1]peer 10.1.1.4 substitute-as
7. Verify configuration