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R1 en conf t int f0/0 ip add 12.1.1.10 255.255.255.0 no sh exit ip route 0.0.0.0 0.0.0.0 f0/0 R2 en conf t int f0/0 ip add 12.1.1.1 255.255.255.0
要求:内部通过NAT上网、设为222.222.222.222 R3模仿内部服务器,静态映射为222.222.222.100 r2 en conf t int f0/0 ip add 192.168.0.100 255.255.255.0 no sh exit ip route 0.0.0.0 0.0.0.0 f0/0 r3
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