OSPF作业

1.整个网络IP地址为192.168.1.0 /24 

2.area 0 区域手工设置R1为DR     R2为BDR

3.R3-R5之间使用密文认证方式

4.R1、R2、R5上配置环回接口，但是R5环回接口不能宣告进OSPF

5.全网可达

一、

首先要子网划分 共有6个网段所以需要向或延伸三个

192.168.1.000 00000 /27 0

192.168.1.001 00000 /27 36

192.168.1.010 00000 /27 64

192.168.1.011 00000 /27 96

192.168.1.100 00000 /27 128

192.168.1.101 00000 /27 160

 配置IP地址和环回

[r1]int g 0/0/0
[r1-GigabitEthernet0/0/0]ip add 192.168.1.1 27

[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]ip add 192.168.1.2 27

[r3]int g 0/0/0
[r3-GigabitEthernet0/0/0]ip add 192.168.1.3 27
[r3]int g 0/0/1
[r3-GigabitEthernet0/0/1]ip add 192.168.1.33 27

[r4]int g 0/0/0
[r4-GigabitEthernet0/0/0]ip add 192.168.1.34 27
[r4]int g 0/0/1
[r4-GigabitEthernet0/0/1]ip add 192.168.1.65 27

[r5]int g 0/0/0
[r5-GigabitEthernet0/0/0]ip add 192.168.1.66 27

[r1]int l 1
[r1-LoopBack1]ip add 192.168.1.97 27

[r2]int l 1
[r2-LoopBack1]ip add 192.168.1.129 27

[r5]int l 1
[r5-LoopBack1]ip add 192.168.1.161 27

二.OSPF基础配置

[r1]ospf 1 router-id 192.168.1.1 
[r1-ospf-1]area 0
[r1-ospf-1-area-0.0.0.0]network 192.168.1.1 0.0.0.0
[r1-ospf-1-area-0.0.0.0]network 192.168.1.97 0.0.0.0

[r2]ospf 1 router-id 192.168.1.2
[r2-ospf-1]area 0
[r2-ospf-1-area-0.0.0.0]network 192.168.1.2 0.0.0.0
[r2-ospf-1-area-0.0.0.0]network 192.168.1.129 0.0.0.0

[r3]ospf 1 router-id 192.168.1.3
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 192.168.1.3 0.0.0.0
[r3-ospf-1]area 1
[r3-ospf-1-area-0.0.0.1]network 192.168.1.33 0.0.0.0

[r4]ospf 1 router-id 192.168.1.34
[r4-ospf-1]area 1
[r4-ospf-1-area-0.0.0.1]network 192.168.1.34 0.0.0.0
[r4-ospf-1-area-0.0.0.1]network 192.168.1.65 0.0.0.0

[r5]ospf 1 router-id 192.168.1.66
[r5-ospf-1]area 1
[r5-ospf-1-area-0.0.0.1]network 192.168.1.66 0.0.0.0 
[r5-ospf-1-area-0.0.0.1]network 192.168.1.161 0.0.0.0

三.修改接口优先级 --- 干涉DR选举

[r1]int g 0/0/0
[r1-GigabitEthernet0/0/0]ospf dr-priority 10

[r2]int g 0/0/0
[r2-GigabitEthernet0/0/0]ospf dr-priority 9

四.R3-R5之间使用密文认证方式

[r3]int g 0/0/1
[r3-GigabitEthernet0/0/1]ospf authentication-mode md5 1 cipher 123456

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

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

[r5]int g 0/0/0
[r5-GigabitEthernet0/0/0]ospf authentication-mode md5 1 cipher 123456

五.设置缺省路由

[r5-ospf-1]default-route-advertise always

六.全网可达