R1（CE）：
interface Loopback0
ip address 1.1.1.1 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.12.1 255.255.255.0
duplex auto
speed auto
!
router rip
version 2
network 1.0.0.0
network 192.168.12.0
no auto-summary
R2（PE1）
ip vrf a
rd 1:1
route-target export 1:1
route-target import 1:1
route-target import 2:2
mpls label range 200 299
mpls label protocol ldp
interface Loopback0
ip address 2.2.2.2 255.255.255.255
!
interface FastEthernet0/0
ip vrf forwarding a
ip address 192.168.12.2 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
ip address 192.168.23.2 255.255.255.0
duplex auto
speed auto
mpls ip
!
router ospf 100
router-id 2.2.2.2
log-adjacency-changes
network 2.2.2.2 0.0.0.0 area 0
network 192.168.23.0 0.0.0.255 area 0
!
router rip
!
address-family ipv4 vrf a
redistribute bgp 100 metric transparent
network 192.168.12.0
no auto-summary
version 2
exit-address-family
!
router bgp 100
no bgp default ipv4-unicast
bgp log-neighbor-changes
neighbor 3.3.3.3 remote-as 100
neighbor 3.3.3.3 update-source Loopback0
!
address-family ***v4
neighbor 3.3.3.3 activate
neighbor 3.3.3.3 send-community extended
exit-address-family
!
address-family ipv4 vrf a
redistribute rip
no synchronization
exit-address-family
mpls ldp router-id Loopback0
R3(RR)：
mpls label range 300 399
mpls label protocol ldp
interface Loopback0
ip address 3.3.3.3 255.255.255.255
!
interface FastEthernet0/0
ip address 192.168.34.3 255.255.255.0
duplex auto
speed auto
mpls ip
!
interface FastEthernet0/1
ip address 192.168.23.3 255.255.255.0
duplex auto
speed auto
mpls ip
!
router ospf 100
router-id 3.3.3.3
log-adjacency-changes
network 3.3.3.3 0.0.0.0 area 0
network 192.168.23.0 0.0.0.255 area 0
network 192.168.34.0 0.0.0.255 area 0
!
router bgp 100
no bgp default ipv4-unicast
bgp log-neighbor-changes
neighbor 2.2.2.2 remote-as 100
neighbor 2.2.2.2 update-source Loopback0
neighbor 6.6.6.6 remote-as 200
neighbor 6.6.6.6 ebgp-multihop 255
neighbor 6.6.6.6 update-source Loopback0
!
address-family ***v4
neighbor 2.2.2.2 activate
neighbor 2.2.2.2 send-community extended
neighbor 2.2.2.2 route-reflector-client
neighbor 6.6.6.6 activate
neighbor 6.6.6.6 send-community extended
neighbor 6.6.6.6 next-hop-unchanged
exit-address-family
!
mpls ldp router-id Loopback0
