重发布实验

 

步骤一：IP配置

R1：

interface Serial4/0/0
 link-protocol ppp
 ip address 12.1.1.1 255.255.255.0 
interface GigabitEthernet0/0/0
 ip address 14.1.1.1 255.255.255.0 
interface LoopBack0
 ip address 1.1.1.1 255.255.255.0 
R2：

interface Serial4/0/1
 link-protocol ppp
 ip address 12.1.1.2 255.255.255.0 
interface Serial4/0/0
 link-protocol ppp
 ip address 23.1.1.1 255.255.255.0 
interface LoopBack0
 ip address 2.2.2.2 255.255.255.0

R3：

interface Serial4/0/0
 link-protocol ppp
 ip address 23.1.1.2 255.255.255.0 
interface Serial4/0/1
 link-protocol ppp
 ip address 34.1.1.1 255.255.255.0 
interface LoopBack0
 ip address 3.3.3.3  255.255.255.0
R4：

interface Serial4/0/0
 link-protocol ppp
 ip address 34.1.1.2 255.255.255.0 
interface GigabitEthernet0/0/0
 ip address 14.1.1.2 255.255.255.0 
interface LoopBack0
 ip address 4.4.4.4 255.255.255.0

步骤二：发布路由

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]ospf 1 
[R2-ospf-1]area 0    
[R2-ospf-1-area-0.0.0.0]network 23.1.1.0 0.0.0.255
[R2-ospf-1-area-0.0.0.0]q
[R2-ospf-1]q
[R2]rip 1
[R2-rip-1]version 2  
[R2-rip-1]network 12.0.0.0
[R2-rip-1]network 2.0.0.0

R3:

[R3]ospf 1   
[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 3.3.3.0 0.0.0.255

R4:

[R4]ospf 1 
[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
[R4-ospf-1-area-0.0.0.0]q
[R4-ospf-1]q
[R4]rip 1
[R4-rip-1]version 2
[R4-rip-1]network 14.0.0.0

步骤四：双向重发布

R2：

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

R4：

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

检测R1

 

步骤五：遂改开销直选路

择优选择去4.0网段的路径
走14网段，剩余路径设置为备份路径，在R2上修改

[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]q     
[R2]route-policy 1 permit node 20       
[R2-route-policy]q
[R2]rip 1
[R2-rip-1]import-route ospf 1 route-policy 1  

 择优选择去32网段的路径
走12网段，剩余路径设置为备份路径，在R4上修改
[R4]ip ip-prefix 1 index 10 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]q
[R4]route-policy 1 permit node 20
[R4-route-policy]q
[R4]rip 1    
[R4-rip-1]import-route ospf 1 route-policy 1

择优选择去34网段的路径
走14网段，剩余路径设置为备份路径，在R2上修改

[R2]ip ip-prefix 2 permit 34.1.1.0 24
[R2]route-policy 1 permit node 15
Info: New Sequence of this List.
[R2-route-policy]if-match ip-prefix 2
[R2-route-policy]apply cost + 10

检测R3

在R2上修改type类型使除14网段外，其余都走R2

由于type1优于type2因此修改为type1

发现14网段不满足要求，则因对14网段的COS值进行修改，在R4上进行修改

[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]import-route rip 1 route-policy 14