拓扑：

 

 

R4配置：

ip vrf retail

rd 1:1 ! ip vrf trading rd 2:2 ! interface Loopback0 ip address 4.4.4.4 255.255.255.255 ! interface Loopback1 ip vrf forwarding trading ip address 20.1.1.4 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 ip vrf forwarding retail ip address 10.1.1.4 255.255.255.0 duplex auto speed auto ! interface FastEthernet0/1 no ip address duplex auto speed auto ! interface FastEthernet0/1.100 encapsulation dot1Q 100 ip vrf forwarding retail ip address 192.168.14.4 255.255.255.0 ! interface FastEthernet0/1.200 encapsulation dot1Q 200 ip vrf forwarding trading ip address 172.16.14.4 255.255.255.0 ! router ospf 100 vrf retail log-adjacency-changes network 10.1.1.0 0.0.0.255 area 0 network 192.168.14.0 0.0.0.255 area 0 ! router ospf 200 vrf trading log-adjacency-changes network 20.1.1.0 0.0.0.255 area 0 network 172.16.14.0 0.0.0.255 area 0

R5配置：

ip vrf retail

rd 1:1 ! ip vrf trading rd 2:2 ! interface Loopback0 ip address 5.5.5.5 255.255.255.255 ! interface Loopback1 ip vrf forwarding trading ip address 40.1.1.5 255.255.255.0 ip ospf network point-to-point ! interface FastEthernet0/0 no ip address duplex auto speed auto ! interface FastEthernet0/0.100 encapsulation dot1Q 100 ip vrf forwarding retail ip address 192.168.35.5 255.255.255.0 ! interface FastEthernet0/0.200 encapsulation dot1Q 200 ip vrf forwarding trading ip address 172.16.35.5 255.255.255.0 ! interface FastEthernet0/1 ip vrf forwarding retail ip address 30.1.1.5 255.255.255.0 duplex auto speed auto ! router ospf 100 vrf retail log-adjacency-changes network 30.1.1.0 0.0.0.255 area 0 network 192.168.35.0 0.0.0.255 area 0 ! router ospf 200 vrf trading log-adjacency-changes network 40.1.1.0 0.0.0.255 area 0 network 172.16.35.0 0.0.0.255 area 0

R1配置：

ip vrf retail

rd 100:100 route-target export 100:100 route-target import 100:100 ! ip vrf trading rd 100:200 route-target export 100:200 route-target import 100:200 ! mpls label range 100 199 mpls label protocol ldp ! interface Loopback0 ip address 1.1.1.1 255.255.255.255 ! interface FastEthernet0/0 ip address 12.1.1.1 255.255.255.0 duplex auto speed auto mpls ip ! interface FastEthernet0/1 no ip address duplex auto speed auto ! interface FastEthernet0/1.100 encapsulation dot1Q 100 ip vrf forwarding retail ip address 192.168.14.1 255.255.255.0 ! interface FastEthernet0/1.200 encapsulation dot1Q 200 ip vrf forwarding trading ip address 172.16.14.1 255.255.255.0 ! router ospf 110 vrf retail log-adjacency-changes redistribute bgp 100 subnets network 192.168.14.0 0.0.0.255 area 0 ! router ospf 210 vrf trading log-adjacency-changes redistribute bgp 100 subnets network 172.16.14.0 0.0.0.255 area 0 ! router ospf 100 router-id 1.1.1.1 log-adjacency-changes network 1.1.1.1 0.0.0.0 area 0 network 12.1.1.0 0.0.0.255 area 0 ! router bgp 100 bgp router-id 1.1.1.1 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 trading redistribute ospf 210 vrf trading match internal external 1 external 2 nssa-external 1 nssa-external 2 no synchronization exit-address-family ! address-family ipv4 vrf retail redistribute ospf 110 vrf retail match internal external 1 external 2 nssa-external 1 nssa-external 2 no synchronization exit-address-family ! mpls ldp router-id Loopback0

R2配置：

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 address 12.1.1.2 255.255.255.0 duplex auto speed auto mpls ip ! interface FastEthernet0/1 ip address 23.1.1.2 255.255.255.0 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 12.1.1.0 0.0.0.255 area 0 network 23.1.1.0 0.0.0.255 area 0 ! mpls ldp router-id Loopback0

R3配置：

ip vrf retail

rd 100:100 route-target export 100:100 route-target import 100:100 ! ip vrf trading rd 100:200 route-target export 100:200 route-target import 100:200 ! mpls label range 300 399 mpls label protocol ldp interface Loopback0 ip address 3.3.3.3 255.255.255.255 ! interface FastEthernet0/0 no ip address duplex auto speed auto ! interface FastEthernet0/0.100 encapsulation dot1Q 100 ip vrf forwarding retail ip address 192.168.35.3 255.255.255.0 ! interface FastEthernet0/0.200 encapsulation dot1Q 200 ip vrf forwarding trading ip address 172.16.35.3 255.255.255.0 ! interface FastEthernet0/1 ip address 23.1.1.3 255.255.255.0 duplex auto speed auto mpls ip ! router ospf 110 vrf retail log-adjacency-changes redistribute bgp 100 subnets network 192.168.35.0 0.0.0.255 area 0 ! router ospf 210 vrf trading log-adjacency-changes redistribute bgp 100 subnets network 172.16.35.0 0.0.0.255 area 0 ! router ospf 100 router-id 3.3.3.3 log-adjacency-changes network 3.3.3.3 0.0.0.0 area 0 network 23.1.1.0 0.0.0.255 area 0 ! router bgp 100 bgp router-id 3.3.3.3 no bgp default ipv4-unicast bgp log-neighbor-changes neighbor 1.1.1.1 remote-as 100 neighbor 1.1.1.1 update-source Loopback0 ! address-family ***v4 neighbor 1.1.1.1 activate neighbor 1.1.1.1 send-community extended exit-address-family ! address-family ipv4 vrf trading redistribute ospf 210 vrf trading match internal external 1 external 2 nssa-external 1 nssa-external 2 no synchronization exit-address-family ! address-family ipv4 vrf retail redistribute ospf 110 vrf retail match internal external 1 external 2 nssa-external 1 nssa-external 2 no synchronization exit-address-family !

mpls ldp router-id Loopback0

验证：

从上图可以看出并没有收到同一部门的路由，查看OSPF数据库

从上图可以看出路由已经放进了OSPF 的数据库，但是由于设置了down选项，OSPF检查忽略了这些路由。

解决办法：

禁用DOWN检查

验证：