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1.划分网段

192.168.1.0/25area1

骨干链路192.168.1.0/27

R1环回192.168.1.32/27

r2环回192.168.1.64/27

192.168.1.128/25area2

骨干链路192.168.1.128/26

r3环回192.168.1.192/26

2.配置ip

如R1

int g0/0/0

IP address 192.168.1.1/29

int loopback0

ip address 192.168.1.33/27

如r3

int g0/0/0

IP address 192.168.1.3/29

int loopback0

ip address 192.168.1.193/26

3.配置ospf

r1

ospf 1 router-id 1.1.1.1

area 0

network 192.168.1.1 0.0.0.0

network 192.168.1.33 0.0.0.0

r4

ospf 1 router-id 4.4.4.4

area 1

network 192.168.1.129 0.0.0.0

4.配置静态

r1   IP route-static 4.4.4.0 24 192.168.1.3

r2  IP route-static 4.4.4.0 24 192.168.1.3

r3  IP route-static 4.4.4.0 24 192.168.1.129

5.汇总以及防还

如r3

ospf 1

area 0

abr-summary 192.168.1.0 255.255.255.128

quit

ip route-static 192.168.1.0 NULL 0