通过非Vlink方法实现非骨干区域与骨干区域互通
试验拓扑：
R2的配置：
interface Tunnel0/0/0
ip address 1.1.1.1 255.255.255.0
tunnel-protocol gre
source 10.0.23.2
destination 10.0.23.3
ospf 1 router-id 10.0.2.2
area 0.0.0.0
network 10.0.2.2 0.0.0.0
network 10.0.12.0 0.0.0.255
network 1.1.1.0 0.0.0.255
area 0.0.0.1
network 10.0.23.0 0.0.0.255
vlink-peer 10.0.1.1
vlink-peer 10.0.3.3
R3的配置：
interface Tunnel0/0/1
ip address 1.1.1.2 255.255.255.0
tunnel-protocol gre
source 10.0.23.3
destination 10.0.23.2
ospf 1 router-id 10.0.3.3
area 0.0.0.0
network 1.1.1.0 0.0.0.255
area 0.0.0.1
network 10.0.3.3 0.0.0.0
network 10.0.23.0 0.0.0.255
network 10.0.13.0 0.0.0.255
area 0.0.0.2
network 10.0.34.0 0.0.0.255