AR1
#
interface GigabitEthernet0/0/0
ip address 172.16.1.254 255.255.255.0
#
interface GigabitEthernet0/0/1
ip address 100.100.100.1 255.255.255.252
ip route-static 0.0.0.0 0.0.0.0 100.100.100.2 //默认路由
配置gre隧道
#
interface Tunnel0/0/1 //建立隧道接口
ip address 1.1.1.1 255.255.255.252
tunnel-protocol gre // 配置隧道协议:gre
source 100.100.100.1 //源地址
destination 200.200.200.1 //目标地址
#
ip route-static 192.168.1.0 255.255.255.0 Tunnel0/0/1
AR2
#
interface GigabitEthernet0/0/0
ip address 100.100.100.2 255.255.255.252
#
interface GigabitEthernet0/0/1
ip address 200.200.200.2 255.255.255.252
AR3
#
interface GigabitEthernet0/0/0