今天做了一下 GRE ×××的实验,分享一下。
R1配置:
R1#show run
Building configuration...
version 12.4
hostname R1
!
interface Loopback0
ip address 172.16.1.1 255.255.255.0
!
interface Tunnel0
ip address 172.16.10.1 255.255.255.0
tunnel source Serial0/0
tunnel destination 210.1.2.1
!
interface Serial0/0
ip address 210.1.1.1 255.255.255.0
serial restart-delay 0
!
router rip
version 2
network 172.16.0.0
no auto-summary
!
ip route 0.0.0.0 0.0.0.0 Serial0/0
!
end
ISP配置就简单了,只要配置IP地址就可以了
ISP#show run
Building configuration...
version 12.4
!
hostname ISP
!
interface Serial0/0
ip address 210.1.1.2 255.255.255.0
serial restart-delay 0
!
interface Serial0/1
ip address 210.1.2.2 255.255.255.0
serial restart-delay 0
end
R2配置:
R2#show run
version 12.4
hostname R2
!
interface Loopback0
ip address 172.16.4.1 255.255.255.0
!
interface Tunnel0
ip address 172.16.10.2 255.255.255.0
tunnel source Serial0/0
tunnel destination 210.1.1.1
!
interface Serial0/0
ip address 210.1.2.1 255.255.255.0
serial restart-delay 0
!
router rip
version 2
network 172.16.0.0
no auto-summary
!
ip http server
no ip http secure-server
!
ip route 0.0.0.0 0.0.0.0 Serial0/0
end
这个实验tunnel网段也是172.16内的,所以做RIP的时候只需要声明172.16.0.0网段的就可以了。但是如果tunnel和内网地址不在一类地址内,那么要记得做RIP的时候要记得生命tunnel端口地址的网段。其实就相当于虚拟出一个端口来,将两端路由连接起来一样。
如果做静态路由
R1 : ip route 172.16.4.0 255.255.255.0 tunnel 0
R2 :ip route 172.16.1.0 255.255.255.0 172.16.10.1