OSPF comprehensive experiment

One 、 Experimental topics

The topology and topic requirements of the experiment are shown in the figure below ：

Two 、 The experimental steps

1、 open ensp, Build network topology

2、 Divide network segments and allocate them reasonably IP 

Public network address  

R3

R5

[r5]int Serial 4/0/0
[r5-Serial4/0/0]ip add 45.0.0.1 24

R6

[r6]int Serial 4/0/0
[r6-Serial4/0/0]ip add 46.0.0.1 24

R7

[r7]int g 0/0/0
[r7-GigabitEthernet0/0/0]ip add 47.0.0.1 24

R4

[isp]int Serial 4/0/0
[isp-Serial4/0/0]ip add 34.0.0.2 24
[isp-Serial4/0/0]int  s 4/0/1
[isp-Serial4/0/1]ip add 45.0.0.2 24
[isp-Serial4/0/1]int s 3/0/0
[isp-Serial3/0/0]ip add 46.0.0.2 24
[isp-Serial3/0/0]int g 0/0/0
[isp-GigabitEthernet0/0/0]ip add 47.0.0.2 24
[isp-GigabitEthernet0/0/0]int l0
[isp-LoopBack0]ip add 4.4.4.4 24

Configure default

R3

[r3]ip route-static 0.0.0.0 0 34.0.0.2

R5

[r5]ip route-static 0.0.0.0 0 45.0.0.2

R6

[r6]ip route-static 0.0.0.0 0 46.0.0.2

R7

[r7]ip route-static 0.0.0.0 0 47.0.0.2 

Be careful ：

In order to find problems in time , At this stage, we can check whether there is a problem with the previous configuration , In the public network environment, two people interact with each other ping once

3、 To configure MGRE Environmental Science

R3 For example ：

[r3]int Tunnel 0/0/0
[r3-Tunnel0/0/0]ip add 172.16.1.1 29
[r3-Tunnel0/0/0]tunnel-protocol gre p2mp 
[r3-Tunnel0/0/0]source 34.0.0.1
[r3-Tunnel0/0/0]nhrp network-id 100
[r3-Tunnel0/0/0]nhrp entry multicast dynamic

R5/6/7 Same operation , And so on  

see R3 Neighborhood watch

At the same time, both ping Let's test

4、 To configure OSPF

R1

[r1]ospf 1 router-id 1.1.1.1
[r1-ospf-1]a 1
[r1-ospf-1-area-0.0.0.1]network 172.16.0.0 0.0.255.255

R2

[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]a 1
[r2-ospf-1-area-0.0.0.1]network 172.16.0.0 0.0.255.255

R3

[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]a 1
[r3-ospf-1-area-0.0.0.1]network 172.16.32.0 0.0.7.255

[r3-ospf-1-area-0.0.0.1]a 0
[r3-ospf-1-area-0.0.0.0]net
[r3-ospf-1-area-0.0.0.0]network 172.16.1.1 0.0.0.0

R5

[r5]ospf 1 rout
[r5]ospf 1 router-id 5.5.5.5
[r5-ospf-1]a 0
[r5-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255

R6

[r6]ospf 1 router-id 6.6.6.6
[r6-ospf-1]a 0
[r6-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.3.255
[r6-ospf-1-area-0.0.0.0]a 2
[r6-ospf-1-area-0.0.0.2]network 172.16.64.1 0.0.0.0

R7

[r7]ospf 1 router-id 7.7.7.7
[r7-ospf-1]a 0
[r7-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.7.255
[r7-ospf-1-area-0.0.0.0]a 3
[r7-ospf-1-area-0.0.0.3]network 172.16.96.1 0.0.0.0

Empathy R8/9/10/11/12 And so on ......

5、 Route summary and anti ring

R3

[r3-ospf-1-area-0.0.0.1]abr-summary 172.16.32.0 255.255.224.0
[r3]ip route-static 172.16.32.0 19 NULL 0

Empathy R6/7/9/12 And so on ......

6、R3/6/7 To configure NET, Be able to access R4 Loopback

R3

[r3]acl 2000
[r3-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[r3-Serial4/0/0]nat outbound 2000

Empathy R6/7 And so on ......

7、 Manual certification

R1

[r1]ospf 1
[r1-ospf-1]area 1
[r1-ospf-1-area-0.0.0.1]authentication-mode md5 1 123

R2...R3...