1、工作原理
1.1加封裝過程
1.2解封裝過程
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interface GigabitEthernet0/0/0
ip address 10.0.12.1 255.255.255.0
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interface GigabitEthernet0/0/1
ip address 10.0.1.1 255.255.255.0
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interface Tunnel0/0/0
ip address unnumbered interface GigabitEthernet0/0/0//將接口的IP地址直接分配給tunnel,也可以自己手動創建IP地址
tunnel-protocol gre
source GigabitEthernet0/0/0
destination 10.0.23.3//此處注意不要將destination誤寫爲description
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ip route-static 0.0.0.0 0.0.0.0 10.0.12.2
ip route-static 10.0.3.0 255.255.255.0 Tunnel0/0/0
R2:
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interface GigabitEthernet0/0/0
ip address 10.0.12.2 255.255.255.0
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interface GigabitEthernet0/0/1
ip address 10.0.23.2 255.255.255.0
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ip route-static 10.0.1.0 255.255.255.0 10.0.12.1
ip route-static 10.0.3.0 255.255.255.0 10.0.23.3
R3:
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interface GigabitEthernet0/0/0
ip address 10.0.23.3 255.255.255.0
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interface GigabitEthernet0/0/1
ip address 10.0.3.3 255.255.255.0
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interface Tunnel0/0/0
ip address unnumbered interface GigabitEthernet0/0/0
tunnel-protocol gre
source GigabitEthernet0/0/0
destination 10.0.12.1
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ip route-static 0.0.0.0 0.0.0.0 10.0.23.2