浮动静态路由

浮动静态路由

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我简单地试验拓扑

Router&amp;gt;en

Router#conf t

Enter configuration commands, one per line. End with CNTL/Z.

Router(config)#host ru1

ru1(config)#int s0/0

ru1(config-if)#ip add 192.168.10.1 255.255.255.0

ru1(config-if)#clock rate 64000

ru1(config-if)#no shut

%LINK-5-CHANGED: Interface Serial0/0, changed state to down

ru1(config-if)#exit

ru1(config)#int s0/1

ru1(config-if)#ip add 192.168.11.1 255.255.255.0

%LINK-5-CHANGED: Interface Serial0/1, changed state to down

ru1(config)#int f0/0

ru1(config-if)#ip add 172.16.1.1 255.255.255.0

%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up

ru1(config)#

%LINK-5-CHANGED: Interface Serial0/0, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to up

%LINK-5-CHANGED: Interface Serial0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to up

第一个路由器上的基本配置

这里我把两个接口下 均设置了 时钟频率 不知道有错没有

Router(config)#host ru2

ru2(config)#int s0/0

ru2(config-if)#ip add 192.168.10.2 255.255.255.0

ru2(config-if)#no shut

ru2(config-if)#

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to upexit

ru2(config)#int s0/1

ru2(config-if)#ip add 192.168.11.2 255.255.255.0

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/1, changed state to upexit

ru2(config)#int f0/0

ru2(config-if)#ip add 172.16.2.1 255.255.255.0

ru2(config-if)#exit

ru2(config)#

我第二个路由器上的基本配置

Ru1上的静态路由设置

ru1(config)#ip route 172.16.2.0 255.255.0.0 192.168.10.2

ru1(config)#ip route 172.16.2.0 255.255.0.0 192.168.11.2 50

注意的是这里 目标网段 目标网段的子网掩码 后面可以跟下一跳ip也可以跟接口 在后面跟的就是 管理距离值

ru2(config)#ip route 172.16.1.0 255.255.0.0 192.168.10.1

ru2(config)#ip route 172.16.1.0 255.255.0.0 192.168.11.1 50

这是ru2上的静态路由设置

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ru1&amp;gt;en

ru1#sh ip route

Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP

i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area

* - candidate default, U - per-user static route, o - ODR

P - periodic downloaded static route

Gateway of last resort is not set

172.16.0.0/16 is variably subnetted, 2 subnets, 2 masks

S 172.16.0.0/16 [1/0] via 192.168.10.2

C 172.16.1.0/24 is directly connected, FastEthernet0/0

C 192.168.10.0/24 is directly connected, Serial0/0

C 192.168.11.0/24 is directly connected, Serial0/1

ru1#

这是我ru1上学到的路由信息

这里的S表示是从静态路由协议中学过来的 ，172.16.0.0/16表示目的网段 []内的1表示静态路由默认的管理距离，0 表示度量值 192.168.10.2 表示到达目的网路的下一跳ip地址

ru2&amp;gt;en

ru2#sh ip route

S 172.16.0.0/16 [1/0] via 192.168.10.1

C 172.16.2.0/24 is directly connected, FastEthernet0/0

ru2#

这是我ru2上的路由表信息

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Pc1 上的ip配置

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Pc2 上的ip配置

PC&amp;gt;ping 172.16.1.2

Pinging 172.16.1.2 with 32 bytes of data:

Reply from 172.16.1.2: bytes=32 time=13ms TTL=126

Reply from 172.16.1.2: bytes=32 time=9ms TTL=126

Reply from 172.16.1.2: bytes=32 time=12ms TTL=126

Ping statistics for 172.16.1.2:

Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),

Approximate round trip times in milli-seconds:

Minimum = 9ms, Maximum = 13ms, Average = 11ms

PC&amp;gt;

这是在pc2 上pingpc1 的测试结果

现在我们把链路down掉一条看看变化 如何

ru1#conf t

ru1(config-if)#shut

%LINK-5-CHANGED: Interface Serial0/0, changed state to administratively down

%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0, changed state to down

ru1(config-if)#

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S 172.16.0.0/16 [50/0] via 192.168.11.2

在查看路由表 注意这条信息的变化情况

S 172.16.0.0/16 [50/0] via 192.168.11.1

Reply from 172.16.1.2: bytes=32 time=11ms TTL=126

Minimum = 11ms, Maximum = 13ms, Average = 11ms

再在pc2上测试一下连通性

本文转自 yuzeying1 51CTO博客，原文链接:http://blog.51cto.com/yuzeying/178265