路由策略3_Distribute-list5

拓扑图：

没配置分发列表前：

R2:

router ospf 1

redistribute connected metric 10 subnets

 redistribute rip metric 30 subnets

 network 192.168.23.0 0.0.0.255 area 0

!

router rip

 version 2

 redistribute connected metric 2

 redistribute ospf 1 metric 4

 network 192.168.12.0

 no auto-summary

查看各路由器的路由表：

r1#sh ip rou

C    192.168.12.0/24 is directly connected, Serial0/0

     1.0.0.0/24 is subnetted, 1 subnets

C       1.1.1.0 is directly connected, Loopback0

     2.0.0.0/24 is subnetted, 1 subnets

R       2.2.2.0 [120/2] via 192.168.12.2, 00:00:17, Serial0/0

     10.0.0.0/24 is subnetted, 1 subnets

C       10.10.10.0 is directly connected, Loopback1

R    192.168.23.0/24 [120/2] via 192.168.12.2, 00:00:17, Serial0/0

r1#

r2#sh ip rou

C    192.168.12.0/24 is directly connected, Serial0/0

     1.0.0.0/24 is subnetted, 1 subnets

R       1.1.1.0 [120/1] via 192.168.12.1, 00:00:11, Serial0/0

     2.0.0.0/24 is subnetted, 1 subnets

C       2.2.2.0 is directly connected, Loopback0

     10.0.0.0/24 is subnetted, 1 subnets

R       10.10.10.0 [120/1] via 192.168.12.1, 00:00:11, Serial0/0

C    192.168.23.0/24 is directly connected, Serial0/1

r2#

r3#sh ip rou

O E2 192.168.12.0/24 [110/10] via 192.168.23.1, 00:00:22, Serial0/0

     1.0.0.0/24 is subnetted, 1 subnets

O E2    1.1.1.0 [110/30] via 192.168.23.1, 00:00:22, Serial0/0

     2.0.0.0/24 is subnetted, 1 subnets

O E2    2.2.2.0 [110/10] via 192.168.23.1, 00:00:22, Serial0/0

     10.0.0.0/24 is subnetted, 1 subnets

O E2    10.10.10.0 [110/30] via 192.168.23.1, 00:00:09, Serial0/0

C    192.168.23.0/24 is directly connected, Serial0/0r3#

可以看到各路由器都学习到了全网的路由！

下面配置分发列表：

R2：

access-list 1 permit 1.1.1.0 0.0.0.255

router ospf 1

distribute-list 1 out rip //配置分发列表，关联ACL序号1，应用在出接口，协议为RIP；这里的RIP是指重发布的来源为RIP协议（过渡从RIP网络重发布过来的，其它路由协议的路由不受影响，如下，R2的直连路由2.2.2.2/24没有被过渡掉）

S注意：distribute-list 1 后面如何要加协议的话只能在OUT方向，IN方向无此功能！！！

查看R3的路由表：

r3#sh ip rou

O E2 192.168.12.0/24 [110/10] via 192.168.23.1, 00:01:03, Serial0/0

     1.0.0.0/24 is subnetted, 1 subnets

O E2    1.1.1.0 [110/30] via 192.168.23.1, 00:01:03, Serial0/0

     2.0.0.0/24 is subnetted, 1 subnets

O E2    2.2.2.0 [110/10] via 192.168.23.1, 00:01:03, Serial0/0

C    192.168.23.0/24 is directly connected, Serial0/0

r3#

可以看出R3只学习到了RIP网络的1.1.1.1/24，那为什么2.2.2.0/24还在呢？因为它是R2的直连路由而不是RIP网络的路由！！！

      本文转自810105851 51CTO博客，原文链接http://blog.51cto.com/4708948/1131442：，如需转载请自行联系原作者