使用distribute-list(分发列表)控制路由更新

1、10. k 1.OZ24f 1/010-1.2. 0/2410_ 1_ 3. 0/24fl/Of2/0使用distribute-list （分发列表）控制路由更新distribute list可以用来控制路由更新，它需要用到access list。一般情况下，access list并不能控制由路由器自己生成的数据流，但是如果将access list应用到distribute list ，则可以用来允许、拒绝路由选择更新。下面是本实例用到的拓扑：在R4上过港掉1 丁跟16. 0, 0/24172- 16- E W24两条路实验操作：R1:in terface LoopbackO ip addre

2、ss 172.16.0.1 255.255.255.0interface Loopback1 ip address 172.16.1.1 255.255.255.0 !interface Loopback2ip address 172.16.2.1 255.255.255.0 !interface Loopback3ip address 172.16.3.1 255.255.255.0 !interface FastEthernet0/0ip address 10.1.1.1 255.255.255.0!router eigrp 1network 10.1.1.0 0.0.0.255netwo

3、rk 172.16.0.0 0.0.0.255network 172.16.1.0 0.0.0.255network 172.16.2.0 0.0.0.255network 172.16.3.0 0.0.0.255no auto-summaryR2:interface FastEthernet0/0 ip address 10.1.1.2 255.255.255.0 !interface FastEthernet1/0ip address 10.1.2.2 255.255.255.0 !interface FastEthernet2/0ip address 10.1.3.2 255.255.2

4、55.0 !router eigrp 1network 10.1.1.0 0.0.0.255network 10.1.2.0 0.0.0.255network 10.1.3.0 0.0.0.255no auto-summaryR3:interface FastEthernet1/0ip address 10.1.2.1 255.255.255.0 !router eigrp 1network 10.1.2.0 0.0.0.255 auto-summaryR4: interface FastEthernet2/0ip address 10.1.3.1 255.255.255.0!router e

5、igrp 1network 10.1.3.0 0.0.0.255distribute-list 1 in FastEthernet2/0auto-summary!access-list 1 deny 172.16.0.0 0.0.1.255access-list 1 permit any，这样比上种方法更另一种方法是在 R2 的 f2/0 接口执行 distribute-list 1 out f2/0好，减少了路由条目在 R2R4 链路上的流动完成之后，在 R4 上查看：R4#sh ip route172.16.0.0/24 is subnetted, 2 subnetsD172.16.2.0

6、 90/158720 via 10.1.3.2, 00:18:52, FastEthernet2/0D172.16.3.0 90/158720 via 10.1.3.2, 00:18:52, FastEthernet2/010.0.0.0/24 is subnetted, 3 subnetsC 10.1.3.0 is directly connected, FastEthernet2/010.1.2.0 90/30720 via 10.1.3.2, 00:25:06, FastEthernet2/0D 10.1.1.0 90/30720 via 10.1.3.2, 00:25:06, Fast

7、Ethernet2/0 而 R3 与 R4 形成对比R3#sh ip route172.16.0.0/24 is subnetted, 4 subnetsD172.16.0.0 90/158720via 10.1.2.2,00:19:04, FastEthernet1/0D172.16.1.0 90/158720via 10.1.2.2,00:19:04, FastEthernet1/0D172.16.2.0 90/158720via 10.1.2.2,00:19:04, FastEthernet1/0D172.16.3.0 90/158720via 10.1.2.2,00:19:04, Fa

8、stEthernet1/010.0.0.0/24 is subnetted, 3 subnetsD 10.1.3.0 90/30720 via 10.1.2.2, 00:25:29, FastEthernet1/0C 10.1.2.0 is directly connected, FastEthernet1/0D 10.1.1.0 90/30720 via 10.1.2.2, 00:25:29, FastEthernet1/0 总结：用分布控制列表过滤路由更新，分布控制列表只抑制某些特定的路由不被发送或接受。 命令格式：A. 应用于进入路由更新(config-router)#distribute-list access-