OSPF comprehensive experiment (7.12)

Purpose ：

  One 、 First, realize the third requirement

1、 To configure r4 Loopback

[r4]interface LoopBack 0
[r4-LoopBack0]ip address 4.4.4.4 24

2、 be based on 192.168.1. 0 24 Conduct Subnet partition

2 Net segment + Three loops

192.168.1.0 24 For backbone 192.168.1.0 29 192.168.1.8 29

R1 Loopback ：192.168.1.64 26---192.168.1.64 27 192.168.1.80 27

R2 Loopback ：92.168.1.128 26---192.168.1.128 27 192.168.1.144 27

R3 Loopback ：192.168.1.192 26---192.168.1.192 27 192.168.1.208 27

3、 Specifically To configure ip And loopback

R1:

[r1]interface gi 0/0/0
[r1-GigabitEthernet0/0/0]ip address 192.168.1.1 29
[r1-GigabitEthernet0/0/0]q
[r1]interface LoopBack 0
[r1-LoopBack0]ip address 192.168.1.65 26

R2:

[r2]interface GigabitEthernet 0/0/0
[r2-GigabitEthernet0/0/0]ip address 192.168.1.2 29
[r2]interface LoopBack 0
[r2-LoopBack0]ip address 192.168.1.129 26

R3:

[r3]interface GigabitEthernet 0/0/0
[r3-GigabitEthernet0/0/0]ip address 192.168.1.3 29
[r3-GigabitEthernet0/0/1]q
[r3]interface LoopBack 0
[r3-LoopBack0]ip address 192.168.1.193 26

R4:

[r4]interface GigabitEthernet 0/0/0
[r4-GigabitEthernet0/0/0]ip address 192.168.1.9 29

Two 、 Achieve the first requirement

 1、 start-up ospf Protocol and divide the interfaces into corresponding areas

R1: Both interface and loopback are in the area 0

[r1]ospf 1 router-id 1.1.1.1
[r1-ospf-1]area 0
[r1-ospf-1-area-0.0.0.0]network 192.168.1.1 0.0.0.0
[r1-ospf-1-area-0.0.0.0]network 192.168.1.65 0.0.0.0

R2: Both interface and loopback are in the area 0

[r2]ospf 1 router-id 2.2.2.2
[r2-ospf-1]area 0
[r2-ospf-1-area-0.0.0.0]network 192.168.1.2 0.0.0.0
[r2-ospf-1-area-0.0.0.0]network 192.168.1.129 0.0.0.0

R3: Both the left interface and loopback are in the area 0 Right interface · In area 1

[r3]ospf 1 router-id 3.3.3.3
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]network 192.168.1.3 0.0.0.0
[r3-ospf-1-area-0.0.0.0]network 192.168.1.193 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]ne	
[r3-ospf-1-area-0.0.0.1]network 192.168.1.13 0.0.0.0

R4: Both interface and loopback are in the area 1 also r4 Loopback cannot declare

[r4]ospf 1 router-id 4.4.4.4
[r4-ospf-1]area 1
[r4-ospf-1-area-0.0.0.1]network 192.168.1.9 0.0.0.0

3、 ... and 、 Realize the third requirement

R1:                                                        

[r1]interface GigabitEthernet 0/0/0
[r1-GigabitEthernet0/0/0]ospf dr-priority 0

R2:

[r2]interface gi 0/0/0
[r2-GigabitEthernet0/0/0]ospf dr-priority 0

After completion ：：

 

 

  Four 、 Realize the fourth requirement

 1、r4 You can't directly declare （ Default route ）

[r4]ospf
[r4-ospf-1]default-route-advertise always 

2、 test （ping）

<r1>ping 4.4.4.4
  PING 4.4.4.4: 56  data bytes, press CTRL_C to break
    Reply from 4.4.4.4: bytes=56 Sequence=1 ttl=254 time=50 ms
    Reply from 4.4.4.4: bytes=56 Sequence=2 ttl=254 time=60 ms
    Reply from 4.4.4.4: bytes=56 Sequence=3 ttl=254 time=50 ms
    Reply from 4.4.4.4: bytes=56 Sequence=4 ttl=254 time=70 ms
    Reply from 4.4.4.4: bytes=56 Sequence=5 ttl=254 time=50 ms

  --- 4.4.4.4 ping statistics ---
    5 packet(s) transmitted
    5 packet(s) received
    0.00% packet loss
    round-trip min/avg/max = 50/56/70 ms

3、 Keep updates safe （ Manual certification ）

r1~r2~r3

[r1-GigabitEthernet0/0/0]ospf authentication-mode md5 1 cipher 123
[r2-GigabitEthernet0/0/0]ospf authentication-mode md5 1 cipher 123
[r3-GigabitEthernet0/0/0]ospf authentication-mode md5 1 cipher 12

r3~r4

[r3-GigabitEthernet0/0/1]ospf authentication-mode md5 1 cipher 456
[r4-GigabitEthernet0/0/0]ospf authentication-mode md5 1 cipher 456

4、 Avoid loops （ Empty interface routing ） 

r1:[r1]ip route-static 192.168.1.64 26 NULL 0

r2:[r1]ip route-static 192.168.1.128 26 NULL 0

r3:[r1]ip route-static 192.168.1.192 26 NULL 0

r4:[r1]ip route-static 4.4.4.0 NULL 0

5、 Reduce the number of routing entries （ Manual summary ）

[r3]ospf
[r3-ospf-1]area 0
[r3-ospf-1-area-0.0.0.0]abr-summary 192.168.1.0 255.255.255.0