OSPF实验

1.要求

2.拓扑

 

 3.分析

1.各网段ip如图

2.更具要求需要干涉选举，将r1、r2优先级直接设置为0突出选举更加方便

3.需要汇总，认证，设置空接口，缺省

4.配置

1）.接口ip 配置、环回ip。

[r1]int loopb 11
[r1-LoopBack11]ip add 192.168.1.1 27
[r1]int g0/0/0
[r1-GigabitEthernet0/0/0]ip add 192.168.1.97 27

[r2]int loopb 22
[r2-LoopBack22]ip add 192.168.1.33 27
[r2]int g0/0/0
[r2-GigabitEthernet0/0/0]ip add 192.168.1.98 27

[r3]
[r3]int loopb 33
[r3-LoopBack33]ip add 192.168.1.65 27
[r3]int g0/0/0
[r3-GigabitEthernet0/0/0]ip add 192.168.1.99 27
[r3]int g0/0/1
[r3-GigabitEthernet0/0/1]ip add 192.168.1.129 30

[r4]int loopb 44
[r4-LoopBack44]ip add 4.4.4.4 24
[r4]int g0/0/0
[r4-GigabitEthernet0/0/0]ip add 192.168.1.130 30

2）.开启OSPF，宣告 

[r1]ospf 1 route-i	
[r1]ospf 1 router-id 1.1.1.1
[r1-ospf-1]area 0
[r1-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.225

[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]area 0
[r2-ospf-1-area-0.0.0.0]network 192.168.1.0 0.0.0.255

[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]area 0	
[r3-ospf-1-area-0.0.0.0]network 192.168.1.99 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 192.168.1.65 0.0.0.0
[r3-ospf-1-area-0.0.0.0]q	
[r3-ospf-1]area 1	
[r3-ospf-1-area-0.0.0.1]network 192.168.1.129 0.0.0.0

[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]area 1	
[r4-ospf-1-area-0.0.0.1]network 192.168.1.0 0.0.0.255

3）. 干涉选举

[r1]int g0/0/0
[r1-GigabitEthernet0/0/0]ospf dr-priority 0

[r2-]int g0/0/0
[r2-GigabitEthernet0/0/0]ospf dr-priority 0

4）.区域汇总 

[r3-ospf-1]a 0	
[r3-ospf-1-area-0.0.0.0]abr-summary 192.168.1.0 255.255.255.0
[r3-ospf-1-area-0.0.0.0]q
[r3-ospf-1]a 1
[r3-ospf-1-area-0.0.0.1]abr-summary 192.168.1.128 255.255.255.128

5）.认证加密 

[r4]int g0/0/0
[r4-GigabitEthernet0/0/0]ospf authentication-mode md5 1 cipher 123456

 6）.缺省路由

[r3]ospf 1
[r3-ospf-1]default-route-advertise  always 

 7）.空接口防止成环

[r3]ip route-static 192.168.1.0 24 NULL 0
[r3]ip route-static 192.168.1.128 25 NULL 0

5.验证

r3的邻居表：

 r1去ping 4.4.4.4

r3路由表