1.配置IP地址

R1:

[r1]interface g0/0/0
[r1-GigabitEthernet0/0/0]ip add
[r1-GigabitEthernet0/0/0]ip address 12.1.1.1 24
[r1-GigabitEthernet0/0/0]q
[r1]interface g0/0/1
[r1-GigabitEthernet0/0/1]ip address 14.1.1.1 24
[r1-GigabitEthernet0/0/1]q
[r1]interface LoopBack 0
[r1-LoopBack0]ip address 1.1.1.1 24

R2:

[r2]interface g0/0/0
[r2-GigabitEthernet0/0/0]ip address 12.1.1.2 24

R3:

[r3]interface g0/0/0
[r3-GigabitEthernet0/0/0]ip address 23.1.1.2 24
[r3-GigabitEthernet0/0/0]q
[r3]interface g0/0/1
[r3-GigabitEthernet0/0/1]ip address 34.1.1.1 24

R4:
[r4]interface g0/0/0
[r4-GigabitEthernet0/0/0]ip address 14.1.1.2 24
[r4-GigabitEthernet0/0/0]q
[r4]interface g0/0/1
[r4-GigabitEthernet0/0/1]ip address 34.1.1.2 24
[r4-GigabitEthernet0/0/1]q
[r4]interface LoopBack 0
[r4-LoopBack0]ip address 4.4.4.4 24

2.啟用協議

R1：

[r1]rip 1
[r1-rip-1]version 2
[r1-rip-1]undo summary
[r1-rip-1]network 12.0.0.0
[r1-rip-1]network 14.0.0.0
[r1-rip-1]network 1.0.0.0

R2:

[r2]rip 1
[r2-rip-1]version 2
[r2-rip-1]undo summary
[r2-rip-1]network 12.0.0.0
[r2-rip-1]network 2.0.0.0
[r2-rip-1]q
[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]area 0
[r2-ospf-1-area-0.0.0.0]network 23.1.1.0 0.0.0.255

R3：

[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 23.1.1.0 0.0.0.255
[r3-ospf-1-area-0.0.0.0]network 34.1.1.0 0.0.0.255
[r3-ospf-1-area-0.0.0.0]network 3.3.3.3 0.0.0.0

R4：

[r4]rip 1
[r4-rip-1]version 2
[r4-rip-1]undo summary
[r4-rip-1]network 14.0.0.0
[r4-rip-1]q
[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]area 0
[r4-ospf-1-area-0.0.0.0]network 34.1.1.0 0.0.0.255
[r4-ospf-1-area-0.0.0.0]network 4.4.4.4 0.0

3.雙點雙向重發布

R2:

[r2]rip 1
[r2-rip-1]import-route ospf 1
[r2-rip-1]q
[r2]ospf 1
[r2-ospf-1]import-route rip

R3:

[r3]interface LoopBack 0
[r3-LoopBack0]ospf network-type broadcast

R4:

[r4]rip 1
[r4-rip-1]import-route ospf 1
[r4-rip-1]q
[r4]ospf 1
[r4-ospf-1]import-route rip
[r4-ospf-1]q
[r4]interface LoopBack 0
[r4-LoopBack0]ospf network-type broadcast

4.路由策略

R2:

[r2]acl 2000
[r2-acl-basic-2000]rule permit source 4.4.4.0 0.0.0.0
[r2-acl-basic-2000]acl 2001
[r2-acl-basic-2001]rule permit source 34.1.1.0 0.0.0.0
[r2-acl-basic-2001]q
[r2]route-policy xx permit node 10
[r2-route-policy]if-match acl 2000
[r2-route-policy]apply cost 4
[r2-route-policy]q
[r2]route-policy xx permit node 20
[r2-route-policy]if-match acl 2001
[r2-route-policy]apply cost 4
[r2-route-policy]q
[r2]route-policy xx permit node 30
[r2-route-policy]rip 1
[r2-rip-1]import-route ospf route-policy xx

[r2]ip ip-prefix a permit 14.1.1.0 24
[r2]route-policy aa permit node 10
[r2-route-policy]if-match ip
[r2-route-policy]if-match ip-prefix a
[r2-route-policy]apply cost 5
[r2-route-policy]q
[r2]route-policy aa permit node 20
[r2-route-policy]q
[r2]ospf 1
[r2-ospf-1]import-route rip route-policy aa

R4：

[r4]ip ip-prefix a permit 12.1.1.0 24
[r4]ip ip-prefix a permit 2.2.2.0 24
[r4]route-policy ww permit node 10
[r4-route-policy]if-match ip-prefix a
[r4-route-policy]apply cost 5
[r4-route-policy]q
[r4]route-policy ww permit node 20
[r4-route-policy]if-match ip-prefix b
[r4-route-policy]apply cost 5
[r4-route-policy]q
[r4]route-policy ww permit node 30
[r4-route-policy]q
[r4]acl 2000
[r4-acl-basic-2000]rule permit source 23.1.1.0 0.0.0.0
[r4-acl-basic-2000]q
[r4]route-policy ww permit node 15
[r4-route-policy]if-match acl 2000
[r4-route-policy]apply cost 4
[r4-route-policy]ospf 1
[r4-ospf-1]import-route rip route-policy ww

5.檢驗備份路由

[r1]interface g0/0/0
[r1-GigabitEthernet0/0/0]shutdown