两台路由器通过公网用GRE实现私网互通

【Router A】
interface Ethernet0/0

ip address 192.168.1.1 255.255.255.0

#                                        
  


interface Serial1/0

ip address 202.0.0.1 255.255.255.0

#
  


interface Tunnel0

description 169.0.0.1

ip address 192.168.0.1 255.255.255.252

source 202.0.0.1

#
  


ip route-static 169.0.0.1 255.255.255.0 Serial 0 preference 60公网静态路由

ip route-static 192.168.2.0 255.255.255.0 Tunnel 0 preference 60
私网静态路由

interface Ethernet0/0

ip address 192.168.2.1 255.255.255.0

#                                        
  


interface Serial1/0

ip address 169.0.0.1 255.255.255.0

#
  


interface Tunnel0

description 202.0.0.1

ip address 192.168.0.2 255.255.255.252

source 169.0.0.1

#
  


ip route-static 202.0.0.1 255.255.255.0 Serial 0 preference 60公网静态路由

ip route-static 192.168.1.0 255.255.255.0 Tunnel 0 preference 60
私网静态路由