Huawei equipment is configured with dual reflectors to optimize the backbone layer of the virtual private network

1. To configure IP Address
   [PE1-LoopBack1]ip add 1.1.1.1 32
   [PE1-GigabitEthernet0/0/0]ip add 20.1.1.1 24
   [PE1-GigabitEthernet0/0/2]ip add 50.1.1.1 24
   [RR1-LoopBack1]ip add 2.2.2.2 32
   [RR1-GigabitEthernet0/0/0]ip add 30.1.1.2 24
   [RR1-GigabitEthernet0/0/1]ip add 20.1.1.2 24
   [RR1-GigabitEthernet0/0/2]ip add 60.1.1.2 24
   [RR2-LoopBack1]ip add 3.3.3.3 32
   [RR2-GigabitEthernet0/0/0]ip add 30.1.1.3 24
   [RR2-GigabitEthernet0/0/1]ip add 40.1.1.3 24
   [RR2-GigabitEthernet0/0/2]ip add 50.1.1.3 24
   [PE2-LoopBack1]ip add 4.4.4.4 32
   [PE2-GigabitEthernet0/0/0]ip add 40.1.1.4 24
   [PE2-GigabitEthernet0/0/2]ip add 60.1.1.4 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 MPLS Backbone configuration IGP, Realize the backbone network IP Connectivity
   [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
   [PE1-ospf-1-area-0.0.0.0]network 50.1.1.0 0.0.0.255
   [RR1]ospf 1
   [RR1-ospf-1]area 0
   [RR1-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
   [RR1-ospf-1-area-0.0.0.0]network 30.1.1.0 0.0.0.255
   [RR1-ospf-1-area-0.0.0.0]network 60.1.1.0 0.0.0.255
   [RR1-ospf-1-area-0.0.0.0]network 20.1.1.0 0.0.0.255
   [RR2]ospf 1
   [RR2-ospf-1]area 0
   [RR2-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
   [RR2-ospf-1-area-0.0.0.0]network 40.1.1.0 0.0.0.255
   [RR2-ospf-1-area-0.0.0.0]network 50.1.1.0 0.0.0.255
   [RR2-ospf-1-area-0.0.0.0]network 30.1.1.0 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 40.1.1.0 0.0.0.255
   [PE2-ospf-1-area-0.0.0.0]network 60.1.1.0 0.0.0.255

3. stay MPLS Backbone network configuration MPLS Basic abilities and MPLS LDP, establish LDP LSP
   [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-GigabitEthernet0/0/2]mpls
   [PE1-GigabitEthernet0/0/2]mpls ldp
   [RR1]mpls lsr-id 2.2.2.2
   [RR1]mpls
   [RR1]mpls ldp
   [RR1-GigabitEthernet0/0/0]mpls
   [RR1-GigabitEthernet0/0/0]mpls ldp
   [RR1-GigabitEthernet0/0/1]mpls
   [RR1-GigabitEthernet0/0/1]mpls ldp
   [RR1-GigabitEthernet0/0/2]mpls
   [RR1-GigabitEthernet0/0/2]mpls ldp
   [RR2]mpls lsr-id 3.3.3.3
   [RR2]mpls
   [RR2]mpls ldp
   [RR2-GigabitEthernet0/0/0]mpls
   [RR2-GigabitEthernet0/0/0]mpls ldp
   [RR2-GigabitEthernet0/0/1]mpls
   [RR2-GigabitEthernet0/0/1]mpls ldp
   [RR2-GigabitEthernet0/0/2]mpls
   [RR2-GigabitEthernet0/0/2]mpls ldp
   [PE2]mpls lsr-id 4.4.4.4
   [PE2]mpls
   [PE2]mpls ldp
   [PE2-GigabitEthernet0/0/0]mpls
   [PE2-GigabitEthernet0/0/0]mpls ldp
   [PE2-GigabitEthernet0/0/2]mpls
   [PE2-GigabitEthernet0/0/2]mpls ldp
   

4. stay PE The device is configured with VPN example
   [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
   [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 10.2.1.4 24

5. stay PE And CE Establish between EBGP Peer relationship , introduce VPN route
   [CE1]bgp 65410
   [CE1-bgp]peer 10.1.1.1 as-number 100
   [PE1]bgp 100
   [PE1-bgp]ipv4-family vpn-instance vpn1
   [PE1-bgp-vpn1]peer 10.1.1.5 as-number 65410
   [PE1-bgp-vpn1]import-route direct
   [CE2]bgp 65420
   [CE2-bgp]peer 10.2.1.4 as-number 100
   [PE2]bgp 100
   [PE2-bgp]ipv4-family vpn-instance vpn1
   [PE2-bgp-vpn1]peer 10.2.1.6 as-number 65420
   [PE2-bgp-vpn1]import-route direct

6. establish PE With the reflector MP-IBGP Peer relationship
   [PE1]bgp 100
   [PE1-bgp]peer 2.2.2.2 as-number 100
   [PE1-bgp]peer 2.2.2.2 connect-interface LoopBack 1
   [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 2.2.2.2 enable
   [PE1-bgp-af-vpnv4]peer 3.3.3.3 enable
   [RR1]bgp 100
   [RR1-bgp]group rr1 internal
   [RR1-bgp]peer rr1 connect-interface LoopBack 1
   [RR1-bgp]peer 1.1.1.1 group rr1
   [RR1-bgp]peer 3.3.3.3 group rr1
   [RR1-bgp]peer 4.4.4.4 group rr1
   [RR1-bgp]ipv4-family vpnv4
   [RR1-bgp-af-vpnv4]peer rr1 enable
   [RR1-bgp-af-vpnv4]peer 1.1.1.1 group rr1
   [RR1-bgp-af-vpnv4]peer 3.3.3.3 group rr1
   [RR1-bgp-af-vpnv4]peer 4.4.4.4 group rr1
   [RR2]bgp 100
   [RR2-bgp]group rr2 internal
   [RR2-bgp]peer rr2 connect-interface LoopBack 1
   [RR2-bgp]peer 1.1.1.1 group rr2
   [RR2-bgp]peer 2.2.2.2 group rr2
   [RR2-bgp]peer 4.4.4.4 group rr2
   [RR2-bgp]ipv4-family vpnv4
   [RR2-bgp-af-vpnv4]peer rr2 enable
   [RR2-bgp-af-vpnv4]peer 1.1.1.1 group rr2
   [RR2-bgp-af-vpnv4]peer 2.2.2.2 group rr2
   [RR2-bgp-af-vpnv4]peer 4.4.4.4 group rr2
   [PE2]bgp 100
   [PE2-bgp]peer 2.2.2.2 as-number 100
   [PE2-bgp]peer 2.2.2.2 connect-interface LoopBack 1
   [PE2-bgp]peer 3.3.3.3 as-number 100
   [PE2-bgp]peer 3.3.3.3 connect-interface LoopBack 1
   [PE2-bgp]ipv4-family vpnv4
   [PE2-bgp-af-vpnv4]peer 3.3.3.3 enable
   [PE2-bgp-af-vpnv4]peer 2.2.2.2 enable
   

7. stay RR1 and RR2 Configure reflection function on
   [RR1]bgp 100
   [RR1-bgp]ipv4-family vpnv4
   [RR1-bgp-af-vpnv4]reflector cluster-id 100
   [RR1-bgp-af-vpnv4]peer rr1 reflect-client
   [RR1-bgp-af-vpnv4]undo policy vpn-target
   [RR2]bgp 100
   [RR2-bgp]ipv4-family vpnv4
   [RR2-bgp-af-vpnv4]reflector cluster-id 100
   [RR2-bgp-af-vpnv4]peer rr2 reflect-client
   [RR2-bgp-af-vpnv4]undo policy vpn-target
   8． Verification configuration
   

It is found that there is a remote connection CE The routing