重发布路由策略实验

实验要求：

1、使用双点双向重发布
2、所有路由器进行最佳选路
3、存在备份路径，不得出现环路，和路由回馈 

实验步骤：

第一步：规划IP地址

设备	接口	IP地址
R1	g0/0/0  LoopBack0 s4/0/0	14.1.1.1/24 1.1.1.1/24 12.1.1.1/24
R2	LoopBack0 s4/0/0 s4/0/1	2.2.2.2/24 12.1.1.2/24 23.1.1.2/24
R3	LoopBack0     Serial4/0/0       Serial4/0/1	3.3.3.3/24 23.1.1.3/24 34.1.1.3/24
R4	g0/0/0 LoopBack0 s4/0/0	14.1.1.4/24 4.4.4.4/24 34.1.1.4/24

第二步：配置IP地址

R1

[R1]int l 0
[R1-LoopBack0]ip ad 1.1.1.1 24
[R1]int s 4/0/0
[R1-Serial4/0/0]ip ad 12.1.1.1 24
[R1]int g 0/0/0
[R1-GigabitEthernet0/0/0]ip ad 14.1.1.1 24

R2

[R2]int s4/0/0
[R2-Serial4/0/0]ip ad 12.1.1.2 24
[R2-Serial4/0/0]int s4/0/1
[R2-Serial4/0/1]ip ad 23.1.1.2 24
[R2]int l 0
[R2-LoopBack0]ip ad 2.2.2.2 24

R3

[R3]int s4/0/0
[R3-Serial4/0/0]ip ad 23.1.1.3 24
[R3-Serial4/0/0]int s 4/0/1
[R3-Serial4/0/1]ip ad 34.1.1.3 24
[R3-Serial4/0/1]int l 0
[R3-LoopBack0]ip ad 3.3.3.3 24

R4

[R4]int s 4/0/0
[R4-Serial4/0/0]ip ad 34.1.1.4 24
[R4-Serial4/0/0]int l 0
[R4-LoopBack0]ip ad 4.4.4.4 24
[R4-LoopBack0]int g 0/0/0
[R4-GigabitEthernet0/0/0]ip ad 14.1.1.4 24

第三步：配置RIP 和OSPF协议

说明：R2和R4处于中间连接部分所以要配置RIP和OSPF

RIP:

R1

[R1]rip 1
[R1-rip-1]version 2 
[R1-rip-1]network 14.0.0.0 
[R1-rip-1]network 12.0.0.0
[R1-rip-1]network 1.0.0.0

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

R4

[R4]rip 1  
[R4-rip-1]version 2
[R4-rip-1]network 14.0.0.0

OSPF

R2

[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 0.0.0.255

R4

[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 4.4.4.0 0.0.0.255

第四步：双向重发布

R2

[R2]rip 1
[R2-rip-1]import-route ospf 1 
[R2]ospf 1
[R2-ospf-1]import-route rip 1

R4

[R4]rip 1 
[R4-rip-1]import-route ospf 1
[R4]ospf 1
[R4-ospf-1]import-route rip 1

第五步：更改业务网段的ospf下的环回为broadcast

[R3]int  l0
[R3-LoopBack0]ospf network-type broadcast

[R4]int l 0
[R4-LoopBack0]ospf network-type broadcast 

第六步：实现备份路径

[R2]ip ip    
[R2]ip ip-prefix 1 permit 4.4.4.0 24
[R2]route-policy 1 permit node 10
[R2-route-policy]if-match ip-prefix 1
[R2-route-policy]apply cost + 10 
[R2]route-policy 1 permit node 20
[R2]rip 1
[R2-rip-1]import-route ospf 1 route-policy 1                 //重发布调用

[R4]ip ip-prefix 1 permit 23.1.1.0 24
[R4]route-policy 1 permit node 10
[R4-route-policy]if-match ip-prefix 1
[R4-route-policy]apply cost + 10
[R4]route-policy 1 permit node 20                 //建立空表

[R4]rip 1
[R4-rip-1]import-route ospf 1 route-policy 1

[R2]ip ip-prefix 2 permit 34.1.1.0 24    
[R2]route-policy 1 permit node 15
[R2-route-policy]if-match ip-prefix 2
[R2-route-policy]apply cost + 10

 第六步：全局修改

[R2]ospf 1  
[R2-ospf-1]import-route rip 1 type 1

[R4]ip ip-prefix 14 permit 14.1.1.0 24
[R4]route-policy 14 permit node 10  
[R4-route-policy]if-match ip-prefix 14
[R4-route-policy]apply cost-type type-1   
[R4-route-policy]apply cost - 10
[R4]route-policy 14 permit node 20
[R4]ospf 1
[R4-ospf-1]import-route rip 1 route-policy 14

到次本次实验基本完成！