OSPF static experiment

Complete the following experiment

IP Address planning  

 

In this experiment, six regions need six network segments to borrow three

172.16.0.0/19
172.16.32.0/19
172.16.64.0/19
172.16.96.0/19
172.16.128.0/19
172.16.160.0/19
172.16.192.0/19
172.16.224.0/19

area1：172.16.0.0/19

Borrow two of the four network segments

172.16.0.0/21
172.16.8.0/21
172.16.16.0/21
172.16.24.0/21

area0：172.16.32.0/19

Borrow two of the four network segments

172.16.32.0/21
172.16.40.0/21
172.16.48.0/21
172.16.56.0/21

area2：172.16.64.0/19

Borrow two of the three network segments

172.16.64.0/21
172.16.72.0/21
172.16.80.0/21

area3：172.16.96.0/19

Borrow two of the three network segments

172.16.96.0/21
172.16.104.0/21
172.16.112.0/21

area4：172.16.128.0/19

Borrow two of the three network segments

172.16.128.0/21
172.16.136.0/21
172.16.144.0/21

rip：172.16.160.0/19

Borrow one of the two loopback network segments

172.16.160.0/20
172.16.176.0/20

IP Address configuration
Successfully configured according to the above network segment division IP Address

Default and NAT Address translation

stay R3、R5、R6、R7 There is a default , All point to the corresponding R4 On the interface and used at each outgoing interface nat Conversion address

With R3 For example

 [R3]ip route-static 0.0.0.0 0 34.1.1.4

NAT Address translation

[R3]acl 2000
[R3-acl-basic-2000]rule 1 permit source any 
[R3-acl-basic-2000]int s3/0/0
[R3-Serial3/0/0]nat outbound 2000

MGRE Environment building
 

R3 Central site configuration

[R3]int t0/0/0
[R3-Tunnel0/0/0]ip add 10.1.1.1 24
[R3-Tunnel0/0/0]tunnel-protocol gre p2mp 

[R3-Tunnel0/0/0]source 34.1.1.3
[R3-Tunnel0/0/0]nhrp entry multicast dynamic 
[R3-Tunnel0/0/0]nhrp network-id 100

R5 Branch site configuration

[R5]int t0/0/0
[R5-Tunnel0/0/0]ip add 10.1.1.2 24
[R5-Tunnel0/0/0]tunnel-protocol gre p2mp 
[R5-Tunnel0/0/0]source s4/0/0
[R5-Tunnel0/0/0]nhrp entry 10.1.1.1 34.1.1.3 register 
[R5-Tunnel0/0/0]nhrp network-id 100

R6 And R7 Configuration mode and R5 identical

When it's done r3 Look up ospf Of nhrp Check whether the table is successful

 OSPF Announcement of
stay mgre The interface type in the environment of is changed to broadcast

Modify the interface type

[R3]int t0/0/0

[R3-Tunnel0/0/0]ospf network-type broadcast

Interference in elections ---R5--R7 Give up the election

[R5]int tunnel 0/0/0

[R5-Tunnel0/0/0]ospf dr-priority 0

  Multi process bidirectional republication
area4

[R9]ospf 1

[R9-ospf-1]import-route ospf 2

RIP Area

[R12]ospf 1
[R12-ospf-1]import-route rip 1

Inter domain routing summary
The inter domain routing sink is always ABR In this experiment R3、R6、R7

With r3 For example

[R3]ospf 1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]abr-summary 172.16.0.0 255.255.224.0 

Extraterritorial routing summary
The extraterritorial routing sink is always ASBR On , This experiment is R9、R12

With r9 For example

[R9]ospf 1
[R9-ospf-1]area 4
[R9-ospf-1-area-0.0.0.4]asbr-summary 172.16.128.0 255.255.224.0

Air interface anti ring
Due to the summary above , To prevent loop generation , Configure an empty interface on each summarized router

[r1]ip route-static 1.1.0.0 22 NULL 0

                      （ The summarized network segment ）

  Special area definition

area1

[R1]ospf 1
[R1-ospf-1]area 1
[R1-ospf-1-area-0.0.0.1]stub

R3

[R3]ospf 1
[R3-ospf-1]area 1
[R3-ospf-1-area-0.0.0.1]stub no-summary 

area2,3

[R7]ospf 1
[R7-ospf-1]area 3
[R7-ospf-1-area-0.0.0.3]nssa

R7

[R7]ospf 1
[R7-ospf-1]area 3
[R7-ospf-1-area-0.0.0.3]nssa no-summary