首先划分子网以及配置IP
然后先配通公网,也就是在R3,R5,R6,R7上配缺省
[r3]ip route-static 0.0.0.0 0 34.0.0.2
[r5]ip route-static 0.0.0.0 0 45.0.0.2
[r6]ip route-static 0.0.0.0 0 46.0.0.2
[r7]ip route-static 0.0.0.0 0 47.0.0.2
然后配置area0的MGRE环境
[r3] int t 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 entry multicast dynamic
[r5]int t0/0/0
[r5-Tunnel0/0/0]ip address 172.16.1.2 29
[r5-Tunnel0/0/0]tunnel-protocol gre p2mp
[r5-Tunnel0/0/0]source s4/0/0
[r5-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register
[r6]int t0/0/0
[r6-Tunnel0/0/0]ip address 172.16.1.3 29
[r6-Tunnel0/0/0]tunnel-protocol gre p2mp
[r6-Tunnel0/0/0]source s4/0/0
[r6-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register
[r7]int t0/0/0
[r7-Tunnel0/0/0]ip address 172.16.1.4 29
[r7-Tunnel0/0/0]tunnel-protocol gre p2mp
[r7-Tunnel0/0/0]source g0/0/0
[r7-Tunnel0/0/0]nhrp entry 172.16.1.1 34.0.0.1 register
然后配置OSPF
[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]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]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—汇总宣告
[r3-ospf-1-area-0.0.0.1]a 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]a 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]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 172.16.65.1 0.0.0.0
[r11]ospf 1 router-id 11.11.11.11
[r11-ospf-1]a 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]a 2
[r12-ospf-1-area-0.0.0.2]network 172.16.65.10 0.0.0.0
[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 172.16.97.1 0.0.0.0
[r8]ospf 1 router-id 8.8.8.8
[r8-ospf-1]a 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]a 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]a 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]a 4
[r10-ospf-1-area-0.0.0.4]network 172.16.0.0 0.0.255.255
然后配置RIP
[r12]rip
[r12-rip-1]v 2
[r12-rip-1]network 172.16.0.0
发现R3只能和R5建邻，邻居表里没有R6,R7,原因是接口类型不支持广播，所以要改接口类型
[r3]int t0/0/0
[r3-Tunnel0/0/0]ospf network-type p2mp
[r5]int t0/0/0
[r5-Tunnel0/0/0]ospf network-type p2mp
[r6]int t0/0/0
[r6-Tunnel0/0/0]ospf network-type p2mp
[r7]int t0/0/0
[r7-Tunnel0/0/0]ospf network-type p2mp
然后在R12上重发布令OSPF与RIP都能相互学习
[r12]ospf
[r12-ospf-1]import-route rip
因为area4是非法的ospf区域，所以要配置重发布
[r9]ospf 1
[r9-ospf-1]a 4
[r9-ospf-1-area-0.0.0.4]undo network 172.16.128.0 0.0.3.255
[r9-ospf-1-area-0.0.0.4]q
[r9-ospf-1]undo a 4
[r9-ospf-1]q
[r9]ospf 2 router-id 9.9.9.9
[r9-ospf-2]a 4
[r9-ospf-2-area-0.0.0.4]network 172.16.128.0 0.0.3.255
[r9-ospf-2-area-0.0.0.4]q
[r9-ospf-2]q
[r9]ospf 1
[r9-ospf-1]im
[r9-ospf-1]import-route os
[r9-ospf-1]import-route ospf 2
然后做优化
骨干区域汇总
[r3]ospf
[r3-ospf-1]a 1
[r3-ospf-1-area-0.0.0.1]abr-summary 172.16.32.0 255.255.224.0
[r6]ospf
[r6-ospf-1]a 2
[r6-ospf-1-area-0.0.0.2]abr-summary 172.16.64.0 255.255.224.0
[r7]ospf
[r7-ospf-1]a 3
[r7-ospf-1-area-0.0.0.3]abr-summary 172.16.96.0 255.255.224.0
[r9]ospf
[r9-ospf-1]asbr-summary 172.16.128.0 255.255.224.0
非骨干区域汇总
将area1做成完全末梢区域
[r1]ospf
[r1-ospf-1]a 1
[r1-ospf-1-area-0.0.0.1]stub
[r2]ospf
[r2-ospf-1]a 1
[r2-ospf-1-area-0.0.0.1]stub
[r3]ospf
[r3-ospf-1]a 1
[r3-ospf-1-area-0.0.0.1]stub no-summary
将area2做成完全的nssa
[r6]ospf
[r6-ospf-1]a 2
[r6-ospf-1-area-0.0.0.2]nssa no-summary
[r11]ospf
[r11-ospf-1]a 2
[r11-ospf-1-area-0.0.0.2]nssa
[r12]ospf
[r12-ospf-1]a 2
[r12-ospf-1-area-0.0.0.2]nssa
将area3做成完全的nssa
[r7]ospf
[r7-ospf-1]a 3
[r7-ospf-1-area-0.0.0.3]nssa no-summary
[r8]ospf
[r8-ospf-1]a 3
[r8-ospf-1-area-0.0.0.3]nssa
[r9]ospf 1
[r9-ospf-1]a 3
[r9-ospf-1-area-0.0.0.3]nssa
area4本来就很少就不用优化了
最后配置缺省和nat，实现全网可达
[r9]ospf 2
[r9-ospf-2]de
[r9-ospf-2]default
[r9-ospf-2]default-route-advertise
[r3]acl 2000
[r3-acl-basic-2000]rule permit source 172.16.0.0 0.0.255.255
[r3-acl-basic-2000]q
[r3]int s4/0/0
[r3-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]q
[r6]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]q
[r7]int g0/0/0
[r7-GigabitEthernet0/0/0]nat outbound 2000