一、实验要求
1,R4为ISP,其上只能配置IP地址;R4与其他所有直连设备间均使用公有IP;
2,R3-R5/6/7为MGRE环境,R3为中心站点;
3,整个OSPF环境IP基于172.16..8/16划分;
4,所有设备均可访问R4的环回;
5,减少LSA的更新量,加快收敛,保障更新安全;
6,全网可达。

二、实验拓扑
三、实验步骤
1、根据实验要求合理划分网段
172.16.0.0/19 --- A0
172.16.0.0/24 --- P2P骨干
172.16.0.0/30
......
172.16.1.0/24 --- MA骨干
172.16.1.0/29
......
172.16.2.0/24
......
172.16.32.0/19 --- A1
172.16.32.0/24 --- P2P骨干
172.16.32.0/30
......
172.16.33.0/24 --- MA骨干
172.16.33.0/29
......
172.16.34.0/24
......
172.16.64.0/19 --- A2
172.16.64.0/24 --- P2P骨干
172.16.64.0/30
......
172.16.65.0/24 --- MA骨干
172.16.65.0/30
......
172.16.66.0/24
......
172.16.96.0/19 --- A3
172.16.96.0/24 --- P2P骨干
172.16.96.0/30
......
172.16.97.0/24 --- MA骨干
172.16.97.0/29
......
172.16.98.0/24
......
172.16.128.0/19 --- A4
172.16.128.0/24 --- P2P骨干
172.16.128.0/30
......
172.16.129.0/24 --- MA骨干
172.16.129.0/29
......
172.16.130.0/24
......
172.16.160.0/19 --- RIP
172.16.160.0/20
172.16.176.0/20
172.16.192.0/19
172.16.224.0/19
2、对A0区域的设备配置IP,环回及缺省路由
[R3]int Serial 4/0/0
 [R3-Serial4/0/0]ip address 34.0.0.1 24
 [R3-Serial4/0/0]q
 [R3]ip route-static 0.0.0.0 0 34.0.0.2
  
  
 [ISP]int s4/0/0    
 [ISP-Serial4/0/0]ip address 34.0.0.2 24
 [ISP-Serial4/0/0]int s3/0/0
 [ISP-Serial3/0/0]ip address 46.0.0.2 24
 [ISP-Serial3/0/0]int s4/0/1    
 [ISP-Serial4/0/1]ip address 45.0.0.2 24
 [ISP-Serial4/0/1]int g0/0/0
 [ISP-GigabitEthernet0/0/0]ip address 47.0.0.2 24
 [ISP-LoopBack0]ip address 4.4.4.4 24
  
  
 [R5]int s4/0/0
 [R5-Serial4/0/0]ip address 45.0.0.1 24
 [R5-Serial4/0/0]int l0
 [R5-LoopBack0]ip address 172.16.2.1 24
 [R5-LoopBack0]q
 [R5]ip route-static 0.0.0.0 0 45.0.0.2
  
  
 [R6]int s4/0/0    
 [R6-Serial4/0/0]ip address 46.0.0.1 24. 
 [R6-Serial4/0/0]int l0
 [R6-LoopBack0]ip address 172.16.3.1 24
 [R6-LoopBack0]q
 [R6]ip route-static 0.0.0.0 0 46.0.0.2
  
  
 [R7]int g0/0/0    
 [R7-GigabitEthernet0/0/0]ip address 47.0.0.1 24
 [R7-GigabitEthernet0/0/0]int l0
 [R7-LoopBack0]ip address 172.16.4.1 24
 [R7-LoopBack0]q
 [R7]ip route-static 0.0.0.0 0 47.0.0.2
3、配置R3-R5/6/7为MGRE环境,R3为中心站点
[R3]int Tunnel 0/0/0    
 [R3-Tunnel0/0/0]ip address 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  
 *给R3中心开启伪广播
  
  
 [R5]int Tunnel 0/0/0
 [R5-Tunnel0/0/0]ip address 172.16.1.2 29    
 [R5-Tunnel0/0/0]tunnel-protocol gre p2mp     
 [R5-Tunnel0/0/0]source Serial 4/0/0    
 [R5-Tunnel0/0/0]nhrp network-id 100
 [R5-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register
  
  
 [R6]int Tunnel 0/0/0
 [R6-Tunnel0/0/0]ip address 172.16.1.3 29    
 [R6-Tunnel0/0/0]tunnel-protocol gre p2mp     
 [R6-Tunnel0/0/0]source Serial 4/0/0
 [R6-Tunnel0/0/0]nhrp network-id 100    
 [R6-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register 
  
  
 [R7]int Tunnel 0/0/0    
 [R7-Tunnel0/0/0]ip address 172.16.1.4 29    
 [R7-Tunnel0/0/0]tunnel-protocol gre p2mp     
 [R7-Tunnel0/0/0]source GigabitEthernet 0/0/0
 [R7-Tunnel0/0/0]nhrp network-id 100    
 [R7-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register 
4、配置其他路由器接口IP以及环回地址
[R1]int g0/0/0
 [R1-GigabitEthernet0/0/0]ip address 172.16.33.1 29
 [R1-GigabitEthernet0/0/0]int l0    
 [R1-LoopBack0]ip address 172.16.34.1 24
  
  
 [R2]int g0/0/0    
 [R2-GigabitEthernet0/0/0]ip address 172.16.33.2 29
 [R2-GigabitEthernet0/0/0]int l0
 [R2-LoopBack0]ip address 172.16.35.1 24
  
  
 [R3]int g0/0/0
 [R3-GigabitEthernet0/0/0]ip address 172.16.33.3 29
 [R3-GigabitEthernet0/0/0]int l0
 [R3-LoopBack0]ip address 172.16.36.1 24
  
  
 [R6]int g0/0/0
 [R6-GigabitEthernet0/0/0]ip address 172.16.65.1 29
  
  
 [R7]int g0/0/1
 [R7-GigabitEthernet0/0/1]ip address 172.16.97.1 29
  
  
 [R8]int g0/0/0
 [R8-GigabitEthernet0/0/0]ip address 172.16.97.2 29
 [R8-GigabitEthernet0/0/0]int l0
 [R8-LoopBack0]ip address 172.16.98.1 24
 [R8-LoopBack0]int g0/0/1    
 [R8-GigabitEthernet0/0/1]ip address 172.16.97.9 29
  
  
 [R9]int g0/0/0    
 [R9-GigabitEthernet0/0/0]ip address 172.16.97.10 29
 [R9-GigabitEthernet0/0/0]int g0/0/1
 [R9-GigabitEthernet0/0/1]ip address 172.16.129.1 29
 [R9-GigabitEthernet0/0/1]int l0
 [R9-LoopBack0]ip address 172.16.130.1 24
  
  
 [R10]int g0/0/0
 [R10-GigabitEthernet0/0/0]ip address 172.16.129.2 29
 [R10-GigabitEthernet0/0/0]int l0    
 [R10-LoopBack0]ip address 172.16.131.1 24
  
  
 [R11]int g0/0/0
 [R11-GigabitEthernet0/0/0]ip address 172.16.65.2 29 
 [R11-GigabitEthernet0/0/0]int g0/0/1
 [R11-GigabitEthernet0/0/1]ip address 172.16.65.9 29 
 [R11-GigabitEthernet0/0/1]int l0    
 [R11-LoopBack0]ip address 172.16.66.1 24
  
  
 [R12]int g0/0/0
 [R12-GigabitEthernet0/0/0]ip address 172.16.65.10 29
 [R12-GigabitEthernet0/0/0]int l0
 [R12-LoopBack0]ip address 172.16.160.1 20
 [R12-LoopBack0]int l1
 [R12-LoopBack1]ip address 172.16.176.1 20
5、启动OSPF协议以及R12的rip
[R1]ospf 1 router-id 1.1.1.1    
 [R1-ospf-1]area 1
 [R1-ospf-1-area-0.0.0.1]network 172.16.0.0 0.0.255.255
  
  
 [R2]ospf 1 router-id 2.2.2.2    
 [R2-ospf-1]area 1
 [R2-ospf-1-area-0.0.0.1]network 172.16.0.0 0.0.255.255
  
  
 [R3]ospf 1 router-id 3.3.3.3
 [R3-ospf-1]area 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]area 0
 [R3-ospf-1-area-0.0.0.0]network 172.16.1.1 0.0.0.0
  
  
 [R5]ospf 1 router-id 5.5.5.5    
 [R5-ospf-1]area 0
 [R5-ospf-1-area-0.0.0.0]network 172.16.0.0 0.0.255.255
  
  
 [R6]ospf 1 router-id 6.6.6.6    
 [R6-ospf-1]area 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]area 2
 [R6-ospf-1-area-0.0.0.2]network 172.16.65.1 0.0.0.0
  
  
 [R7]ospf 1 router-id 7.7.7.7    
 [R7-ospf-1]area 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]area 3
 [R7-ospf-1-area-0.0.0.3]network 172.16.97.1 0.0.0.0
  
  
 [R8]ospf 1 router-id 8.8.8.8    
 [R8-ospf-1]area 3
 [R8-ospf-1-area-0.0.0.3]network 172.16.0.0 0.0.255.255
  
  
 [R9]ospf 1 router-id 9.9.9.9    
 [R9-ospf-1]area 3
 [R9-ospf-1-area-0.0.0.3]network 172.16.97.10 0.0.0.0
 [R9-ospf-1-area-0.0.0.3]area 4
 [R9-ospf-1-area-0.0.0.4]network 172.16.128.0 0.0.3.255
  
  
 [R10]ospf 1 router-id 10.10.10.10    
 [R10-ospf-1]area 4    
 [R10-ospf-1-area-0.0.0.4]network 172.16.0.0 0.0.255.255
  
  
 [R11]ospf 1 router-id 11.11.11.11    
 [R11-ospf-1]area 2    
 [R11-ospf-1-area-0.0.0.2]network 172.16.0.0 0.0.255.255
  
  
 [R12]ospf 1 router-id 12.12.12.12    
 [R12-ospf-1]area 2
 [R12-ospf-1-area-0.0.0.2]network 172.16.65.10 0.0.0.0
 [R12]rip 1
 [R12-rip-1]version 2
 [R12-rip-1]network 172.16.0.0
6、更改R3,R5,R6,R7的tunnel接口类型
[R3]int Tunnel 0/0/0
 [R3-Tunnel0/0/0]ospf network-type p2mp
  
  
 [R5]int Tunnel 0/0/0
 [R5-Tunnel0/0/0]ospf network-type p2mp
  
  
 [R6]int Tunnel 0/0/0    
 [R6-Tunnel0/0/0]ospf network-type p2mp
  
  
 [R7]int Tunnel 0/0/0
 [R7-Tunnel0/0/0]ospf network-type p2mp
 7、在R12上进行重发布,使得运行OSPF的设备学习到域外路由信息
[R12]ospf 1
 [R12-ospf-1]import-route rip 1
 8、减少路由条目
[R9]ospf 1    
 [R9-ospf-1]area 4    
 [R9-ospf-1-area-0.0.0.4]undo network 172.16.128.0 0.0.3.255
 [R9-ospf-1]undo a    
 [R9-ospf-1]undo area 4    
 [R9]ospf 2 router-id 9.9.9.9    
 [R9-ospf-2]area 4
 [R9-ospf-2-area-0.0.0.4]network 172.168.128.0 0.0.3.255
 [R9-ospf-2-area-0.0.0.4]ospf 1    
 [R9-ospf-1]import-route ospf 2
 [R9-ospf-1]ospf 2
 [R9-ospf-2]default-route-advertise
 9、路由汇总(区域间和区域内)以及配置空接口放环
[R3]ospf 1    
 [R3-ospf-1]area 1
 [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
  
  
 [R6]ospf 1    
 [R6-ospf-1]area 2
 [R6-ospf-1-area-0.0.0.2]abr-summary 172.16.64.0 255.255.224.0
 [R6]ip route-static 172.16.64.0 19 NULL 0
  
  
 [R7]ospf 1    
 [R7-ospf-1]area 3    
 [R7-ospf-1-area-0.0.0.3]abr-summary 172.16.96.0 255.255.224.0
 [R7]ip route-static 172.16.96.0 19 NULL 0
  
  
 [R9]ospf 1
 [R9-ospf-1]asbr-summary 172.16.128.0 255.255.224.0
 [R9]ip route-static 172.16.128.0 19 NULL 0
  
  
 [R12]ospf 1    
 [R12-ospf-1]asbr-summary 172.16.128.0 255.255.224.0
 [R12]ip route-static 172.16.160.0 19 NULL 0
10、做特殊区域减少路由条目
[R1]ospf 1    
 [R1-ospf-1]area 1
 [R1-ospf-1-area-0.0.0.1]stub
  
  
 [R2]ospf 1    
 [R2-ospf-1]area 1    
 [R2-ospf-1-area-0.0.0.1]stub 
  
  
 [R3]ospf 1     
 [R3-ospf-1]area 1    
 [R3-ospf-1-area-0.0.0.1]stub no-summary 
  
  
 [R6]ospf 1    
 [R6-ospf-1]area 2
 [R6-ospf-1-area-0.0.0.2]nssa no-summary
  
  
 [R7]ospf 1    
 [R7-ospf-1]area 3
 [R7-ospf-1-area-0.0.0.3]nssa no-summary
  
  
 [R8]ospf 1    
 [R8-ospf-1]area 3    
 [R8-ospf-1-area-0.0.0.3]nssa
  
  
 [R9]ospf 1    
 [R9-ospf-1]area 3    
 [R9-ospf-1-area-0.0.0.3]nssa
  
  
 [R11]ospf 1    
 [R11-ospf-1]area 2
 [R11-ospf-1-area-0.0.0.2]nssa
  
  
 [R12]ospf 1    
 [R12-ospf-1]area 2    
 [R12-ospf-1-area-0.0.0.2]nssa
11、配置nat,使得可以访问公网
[R3]acl 2000    
 [R3-acl-basic-2000]rule  permit source 172.16.0.0 0.0.255.255
 [R3-acl-basic-2000]int s4/0/0    
 [R3-Serial4/0/0]nat outbound 2000
  
  
 [R5]acl 2000
 [R5-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
 [R5-acl-basic-2000]int s4/0/0    
 [R5-Serial4/0/0]nat outbound 2000
  
  
 [R6]acl 2000
 [R6-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
 [R6-acl-basic-2000]int s4/0/0
 [R6-Serial4/0/0]nat outbound 2000
  
  
 [R7]acl 2000    
 [R7-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
 [R7-acl-basic-2000]int g0/0/0    
 [R7-GigabitEthernet0/0/0]nat outbound 2000
12、进行区域认证保障更新安全
[R1]ospf 1
 [R1-ospf-1]area 1
 [R1-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
  
  
 [R2]ospf 1    
 [R2-ospf-1]area 1    
 [R2-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
  
  
 [R3]ospf 1
 [R3-ospf-1]area 1    
 [R3-ospf-1-area-0.0.0.1]authentication-mode md5 1 cipher 123456
 13、加快收敛,修改hello时间
[R3]int Tunnel 0/0/0
 [R3-Tunnel0/0/0]ospf timer hello 10
  
  
 [R5]int Tunnel 0/0/0    
 [R5-Tunnel0/0/0]ospf timer hello 10
  
  
 [R6]int Tunnel 0/0/0
 [R6-Tunnel0/0/0]ospf timer hello 10
  
  
 [R7]int Tunnel 0/0/0    
 [R7-Tunnel0/0/0]ospf timer hello 10
 14、测试全网可达
 
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                            版权声明:本文为博主原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接和本声明。
                         
 原文链接:https://blog.csdn.net/weixin_50528280/article/details/127950828