拓扑设计
ospf
R2路由器先不要配g0/0/0和g0/0/1 R5不要配g0/0/1和g0/0/2

[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]area 0

[r2-ospf-1-area-0.0.0.0]network 2.2.2.2 0.0.0.0
[r2-ospf-1-area-0.0.0.0]net 23.1.1.1 0.0.0.0
[r2-ospf-1-area-0.0.0.0]

[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]a
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 34.1.1.1 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 23.1.1.2 0.0.0.0

[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]a
[r4-ospf-1]area 0
[r4-ospf-1-area-0.0.0.0]net
[r4-ospf-1-area-0.0.0.0]network 4.4.4.4 0.0.0.0
[r4-ospf-1-area-0.0.0.0]net
[r4-ospf-1-area-0.0.0.0]network 47.1.1.1 0.0.0.0
[r4-ospf-1-area-0.0.0.0]net
[r4-ospf-1-area-0.0.0.0]network 34.1.1.2 0.0.0.0

[r7]ospf 1 router-id 7.7.7.7
[r7-ospf-1]a
[r7-ospf-1]area 0
[r7-ospf-1-area-0.0.0.0]net
[r7-ospf-1-area-0.0.0.0]network 47.1.1.2 0.0.0.0
mpls

[r2]mpls lsr-id 2.2.2.2
[r2-mpls]mpls ldp
[r2-mpls-ldp]q
[r2]int g0/0/2
[r2-GigabitEthernet0/0/2]mpls
[r2-GigabitEthernet0/0/2]mpls ldp

[r3]mpls lsr-id 3.3.3.3
[r3]mpls
[r3-mpls]mpls ldp
[r3-mpls-ldp]q
[r3]int g0/0/0
[r3-GigabitEthernet0/0/0]mpls
[r3-GigabitEthernet0/0/0]mpls ldp
[r3-GigabitEthernet0/0/0]int g0/0/1
[r3-GigabitEthernet0/0/1]mpls
[r3-GigabitEthernet0/0/1]mpls ldp

[r4]mpls lsr-id 4.4.4.4
[r4]mpls
[r4-mpls]mpls ldp
[r4-mpls-ldp]int g0/0/0
[r4-GigabitEthernet0/0/0]mpls
[r4-GigabitEthernet0/0/0]mpls ldp
然后进行MPLS VPN
[r2]ip vpn-instance a
[r2-vpn-instance-a]ipv4-family
[r2-vpn-instance-a-af-ipv4]route-distinguisher 1:1
[r2-vpn-instance-a-af-ipv4]vpn-target 1:1
[r2-vpn-instance-a]int g0/0/0
[r2-GigabitEthernet0/0/0]ip binding vpn-instance a
[r2-GigabitEthernet0/0/0]ip address 192.168.2.2 24

PE与PE间建立MP-BPG邻居关系
[r2]bgp 2
[r2-bgp]router-id 2.2.2.2
[r2-bgp]pe 4.4.4.4 as-number 2
[r2-bgp]peer 4.4.4.4 connect-interface LoopBack 0
[r2-bgp]peer 4.4.4.4 next-hop-local
[r2-bgp]ipv4-family vpnv4
[r2-bgp-af-vpnv4]peer 4.4.4.4 enable

[r4]ip vpn-instance a
[r4-vpn-instance-a]ipv4-family
[r4-vpn-instance-a-af-ipv4]route-distinguisher 1:1
[r4-vpn-instance-a-af-ipv4]vpn-target 1:1
[r4]int g0/0/1
[r4-GigabitEthernet0/0/1]ip binding vpn-instance a
[r4-GigabitEthernet0/0/1]ip add 192.168.3.1 24

[r4]bgp 2
[r4-bgp]router-id 4.4.4.4
[r4-bgp]peer 2.2.2.2 as
[r4-bgp]peer 2.2.2.2 connect-interface lo 0
[r4-bgp]peer 2.2.2.2 next-hop-local
[r4-bgp]ipv4-family vpnv4
[r4-bgp-af-vpnv4]peer 2.2.2.2 enable

[r2]ip vpn
[r2]ip vpn-instance b
[r2-vpn-instance-b]ipv4-family
[r2-vpn-instance-b-af-ipv4]route-distinguisher 2:1
[r2-vpn-instance-b-af-ipv4]vpn-target 2:1
[r2-vpn-instance-b-af-ipv4]int g0/0/1
[r2-GigabitEthernet0/0/1]ip b
[r2-GigabitEthernet0/0/1]ip binding vpn
[r2-GigabitEthernet0/0/1]ip binding vpn-instance b

CE端与PE端交互路由
[r2]ip route-static vpn-instance a 192.168.1.0 24 192.168.2.1
[r2]bgp 2
[r2-bgp]ipv4 vpn-instance a
[r2-bgp-a]import-route direct
[r2-bgp-a]import-route static

[r4]ip route-static vpn-instance a 192.168.4.0 192.168.3.2

[r2]bgp 2
[r4-bgp]ipv4 vpn-instance a
[r4-bgp-a]import-route direct
[r4-bgp-a]import-route static

[r1]ip route-static 192.168.3.0 24 192.168.2.2

[r1]ip route-static 192.168.4.0 24 192.168.2.2

[r5]ip route-static 192.168.1.0 24 192.168.3.1
[r5]ip route-static 192.168.2.0 24 192.168.3.1

R6写rip

[r6-rip-1]version 2
[r6-rip-1]undo summary
[r6-rip-1]network 192.168.1.0
[r6-rip-1]network 192.168.2.0-1]version 2

[r2]rip 1 vpn-instance b
[r2-rip-1]version 2
[r2-rip-1]undo summary
[r2-rip-1]network 192.168.0.0

[r2]bgp 2
[r2-bgp]ipv4
[r2-bgp]ipv4-family vpn-instance b
[r2-bgp-b]import-route rip 1
[r2]rip 1
[r2]rip 1 vpn-instance b
[r2-rip-1]import-route bgp

ospf
[r4]ospf 2 vpn-instance b
[r4-ospf-2]a
[r4-ospf-2]area 0
[r4-ospf-2-area-0.0.0.0]net
[r4-ospf-2-area-0.0.0.0]network 192.168.3.1 0.0.0.0
[r4-ospf-2-area-0.0.0.0]q

[r4]bgp 2

[r4-bgp]ipv4-family vpn-instance a

[r4-bgp-a]import-route ospf 2

[r4]ospf 2 vpn-instance a

[r4-ospf-2]import-route bgp
[r7]ospf 2 router-id 7.7.7.7
[r7-ospf-2]area 0
[r7-ospf-2-area-0.0.0.0]network 192.168.4.2 0.0.0.0
[r7-ospf-2-area-0.0.0.0]network 192.168.3.2 0.0.0.0
测试