要达到两地之间通信，可以用到的技术比较多。常用的如×××，虚拟隧道(Tunnel)实验，虽然在安全性方面比较低，但是还是值得一提、
R0:
Router#show running-config
Building configuration...
Current configuration : 638 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0/0
ip address 202.102.60.2 255.255.255.0
!
interface Serial0/0/1
ip address 218.30.1.1 255.255.255.0
clock rate 64000
!
interface Vlan1
no ip address
shutdown
!
ip classless
ip route 61.177.7.0 255.255.255.0 218.30.1.2
!
!
!
!
!
!
!
line con 0
line vty 0 4
login
!
!
!
end
R1:
Router#show running-config
Building configuration...
Current configuration : 638 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface FastEthernet0/0
no ip address
duplex auto
speed auto
shutdown
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0/0
ip address 61.177.7.1 255.255.255.0
clock rate 64000
!
interface Serial0/0/1
ip address 218.30.1.2 255.255.255.0
!
interface Vlan1
no ip address
shutdown
!
ip classless
ip route 202.102.60.0 255.255.255.0 218.30.1.1
!
!
!
!
!
!
!
line con 0
line vty 0 4
login
!
!
!
end
R2：
Router#show running-config
Building configuration...
Current configuration : 821 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Tunnel0
ip address 192.168.3.1 255.255.255.0
tunnel source Serial0/0/0
tunnel destination 61.177.7.2
!
!
interface FastEthernet0/0
ip address 192.168.1.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
shutdown
!
interface Serial0/0/0
ip address 202.102.60.1 255.255.255.0
clock rate 64000
!
interface Serial0/0/1
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
router rip
network 192.168.1.0
network 192.168.3.0
no auto-summary
!
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0/0/0
!
!
!
!
!
!
!
line con 0
line vty 0 4
login
!
!
!
end
R3：
Router#show running-config
Building configuration...
Current configuration : 793 bytes
!
version 12.4
no service timestamps log datetime msec
no service timestamps debug datetime msec
no service password-encryption
!
hostname Router
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
!
interface Tunnel0
ip address 192.168.3.2 255.255.255.0
tunnel source Serial0/0/0
tunnel destination 202.102.60.1
!
!
interface FastEthernet0/0
ip address 192.168.2.1 255.255.255.0
duplex auto
speed auto
!
interface FastEthernet0/1
no ip address
duplex auto
speed auto
!
interface Serial0/0/0
ip address 61.177.7.2 255.255.255.0
!
interface Serial0/0/1
no ip address
shutdown
!
interface Vlan1
no ip address
shutdown
!
router rip
network 192.168.2.0
network 192.168.3.0
no auto-summary
!
ip classless
ip route 0.0.0.0 0.0.0.0 Serial0/0/0
!
!
!
!
!
!
!
line con 0
line vty 0 4
login
!
!
!
end
