1、配置环回和ip
r1：
[r1]interface lo0
[r1-LoopBack0]ip add 1.1.1.1 24
[r1-LoopBack0]int gi 0/0/0
[r1-GigabitEthernet0/0/0]ip add 12.1.1.1 24
[r1-GigabitEthernet0/0/0]int gi 0/0/1
[r1-GigabitEthernet0/0/1]ip add 14.1.1.1 24
r2：
[r2]interface lo0
[r2-LoopBack0]ip add 2.2.2.2 24
[r2-LoopBack0]int gi 0/0/0
[r2-GigabitEthernet0/0/0]ip add 12.1.1.2 24
[r2-GigabitEthernet0/0/0]int gi 0/0/1
[r2-GigabitEthernet0/0/1]ip add 23.1.1.1 24
r3：
[r3]int lo0
[r3-LoopBack0]ip add 3.3.3.3 24
[r3-LoopBack0]int gi 0/0/0
[r3-GigabitEthernet0/0/0]ip add 23.1.1.2 24
[r3-GigabitEthernet0/0/0]int gi 0/0/1
[r3-GigabitEthernet0/0/1]ip add 34.1.1.1 24
r4：
[r4]int lo0
[r4-LoopBack0]ip add 4.4.4.4 24
[r4-LoopBack0]int gi 0/0/0
[r4-GigabitEthernet0/0/0]ip add 34.1.1.2 24
[r4-GigabitEthernet0/0/0]int gi 0/0/1
[r4-GigabitEthernet0/0/1]ip add 14.1.1.2 24
2、做RIP和OSPF宣告
r1：
[r1]rip 1
[r1-rip-1]version 2
[r1-rip-1]network 1.0.0.0
[r1-rip-1]network 12.0.0.0
[r1-rip-1]network 14.0.0.0
r2：
[r2]rip 1
[r2-rip-1]version 2
[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 3.3.3.3 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 34.1.1.0 0.0.0.255
r4：
[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 3.3.3.3 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 34.1.1.0 0.0.0.255
3、使用双向重发布让r1学习到OSPF的信息，让r3学习到RIP的信息
r2：
[r2]rip 1
[r2-rip-1]import-route ospf 1
[r2-rip-1]import-route direct
[r2-rip-1]q
[r2]ospf 1
[r2-ospf-1]import-route rip
[r2-ospf-1]import-route direct
r4：
[r4]rip 1
[r4-rip-1]import-route ospf 1
[r4-rip-1]import-route direct
[r4-rip-1]q
[r4]ospf 1
[r4-ospf-1]import-route rip
[r4-ospf-1]import-route direct
4.增加r4往r1发送路由信息时的度量
[r4]ip ip-prefix a permit 1.1.1.0 24
[r4]ip ip-prefix a permit 12.1.1.0 24
[r4]ip ip-prefix a permit 2.2.2.2 24
[r4]rip 1
[r4]interface g 0/0/1
[r4-GigabitEthernet0/0/1]rip metricout ip-prefix a 2
5.调整选路最佳
r1选路最佳：
[r2]ip ip-prefix ww permit 4.4.4.0 24
[r2]ip ip-prefix ww permit 34.1.1.0 24
[r2]int gi 0/0/0
[r2-GigabitEthernet0/0/0]rip metricout ip-prefix ww 10
[r4]ip ip-prefix ww permit 23.1.1.0 24
[r4]int GigabitEthernet 0/0/1
[r4-GigabitEthernet0/0/1]rip metricout ip-prefix ww 10
r3选路最佳：
[r2]ip ip-prefix ll permit 12.1.1.0 24
[r2]ip ip-prefix ll permit 2.2.2.0 24
[r2]route-policy ll permit node 70
[r2-route-policy]apply cost-type type-1
[r2]route-policy ll permit node 80
[r2]ospf 1
[r2-ospf-1]import-route rip route-policy ll
[r4]ip ip-prefix kk permit 14.1.1.0 24
[r4]route-policy kk permit node 90
Info: New Sequence of this List.
[r4-route-policy]if-match ip-prefix kk
[r4-route-policy]apply cost-type type-1
[r4]route-policy kk permit node 100
[r4]ospf 1
[r4-ospf-1]import-route rip route-policy kk
