实验：
01
拓扑：
02
解决方法：
- 多进程双向重分布
- 创建tunnel通道，宣告到区域0
- 创建虚链接
03
实验过程
1.方法1：多进程双向重分布
(1)重新启动另一个OSPF进程
(2)在2个OSPF进程中宣告不连续的网段
(3)双向发布OSPF进程：redistribute ospf 进程号 subnets
R1:
int s1/0
ip add 1.1.1.1 255.255.255.0
no shutdown
exit
router ospf 110
router-id 1.1.1.1
network 1.1.1.0 0.0.0.255 area 0
R2:
int s1/0
ip add 1.1.1.2 255.255.255.0
no shutdown
int s1/1
ip add 2.2.2.1 255.255.255.0
no shutdown
router ospf 110
router-id 2.2.2.2
network 2.2.2.0 0.0.0.255 area 1
network 1.1.1.0 0.0.0.255 area 0
R3:
int s1/1
ip add 2.2.2.2 255.255.255.0
no shutdown
int s1/0
ip add 3.3.3.1 255.255.255.0
no shutdown
router ospf 110
router-id 3.3.3.3
network 2.2.2.0 0.0.0.255 area 1
redistribute ospf 120 subnets
router ospf 120
ruoter-id 3.3.3.5
network 3.3.3.0 0.0.0.255 area 2
redistribute ospf 110 subnets
R4:
int s1/0
ip add 3.3.3.2 255.255.255.0
no shutdown
router ospf 120
router-id 4.4.4.4
network 3.3.3.0 0.0.0.255 area 2
验证：
R1上查看路由表：
R4上查看路由表情况：
ping测试：
2.创建tunnel通道宣告到区域0
R1:
int s1/0
ip add 1.1.1.1 255.255.255.0
no shutdown
exit
router ospf 110
router-id 1.1.1.1
network 1.1.1.0 0.0.0.255 area 0
R2:
int s1/0
ip add 1.1.1.2 255.255.255.0
no shutdown
int s1/1
ip add 2.2.2.1 255.255.255.0
no shutdown
int tunnel 1
tunnel source 2.2.2.1
tunnel destination 2.2.2.2
ip add 172.16.1.1 255.255.255.0
no shutdown
router ospf 110
router-id 2.2.2.2
network 2.2.2.0 0.0.0.255 area 1
network 1.1.1.0 0.0.0.255 area 0
network 172.16.1.0 0.0.0.255 area 0
R3:
int s1/1
ip add 2.2.2.2 255.255.255.0
no shutdown
int s1/0
ip add 3.3.3.1 255.255.255.0
no shutdown
int tunnel 1
tunnel source 2.2.2.2
tunnel destination 2.2.2.1
ip add 172.16.1.2 255.255.255.0
no shut
router ospf 110
router-id 3.3.3.3
network 2.2.2.0 0.0.0.255 area 1
network 3.3.3.0 0.0.0.255 area 2
network 172.16.1.0 0.0.0.255 area 0
R4:
int s1/0
ip add 3.3.3.2 255.255.255.0
no shutdown
router ospf 110
router-id 4.4.4.4
network 3.3.3.0 0.0.0.255 area 2
验证：
R1上查看路由表：
R4上查看路由表：
ping测试：
3.创建虚链路
R1:
int s1/0
ip add 1.1.1.1 255.255.255.0
no shutdown
exit
router ospf 110
router-id 1.1.1.1
network 1.1.1.0 0.0.0.255 area 0
R2:
int s1/0
ip add 1.1.1.2 255.255.255.0
no shutdown
int s1/1
ip add 2.2.2.1 255.255.255.0
no shutdown
router ospf 110
router-id 2.2.2.2
network 2.2.2.0 0.0.0.255 area 1
network 1.1.1.0 0.0.0.255 area 0
area 1 virtual-link 3.3.3.3
R3:
int s1/1
ip add 2.2.2.2 255.255.255.0
no shutdown
int s1/0
ip add 3.3.3.1 255.255.255.0
no shutdown
router ospf 110
router-id 3.3.3.3
network 2.2.2.0 0.0.0.255 area 1
network 3.3.3.0 0.0.0.255 area 2
area 1 virtual-link 2.2.2.2
R4:
int s1/0
ip add 3.3.3.2 255.255.255.0
no shutdown
router ospf 110
router-id 4.4.4.4
network 3.3.3.0 0.0.0.255 area 2
验证：
R1上查看路由表：
R4上查看路由表：
ping 测试：
至此实验完成，大家可以通过实验验证效果，有什么问题可以加群多交流。
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