配置eigrp的容错
配置
eigrp
的容错
一、
目标
深入理解
eigrp
的工作原理
,,
掌握容错的原理以及使用方法可用场景条件等
.
二、
拓扑结构
三、
实验步骤
1.
基本配置
见拓扑图
测试联通性
sanjose2#ping 192.168.1.1
sanjose2#ping 192.168.64.6
sanjose1#ping 192.168.64.2
结果链路连接没有问题
2.
配置
eigrp
westaman#show ip route
Gateway of last resort is not set
C 192.168.72.0/24 is directly connected, FastEthernet0/0
192.168.64.0/24 is variably subnetted, 3 subnets, 2 masks
C 192.168.64.0/30 is directly connected, Serial1/2
D 192.168.64.0/24 is a summary, 00:34:18, Null0
C 192.168.64.4/30 is directly connected, Serial1/0
D 192.168.1.0/24 [90/2172416] via 192.168.64.5, 00:00:47, Serial1/0
[90/2172416] via 192.168.64.1, 00:00:47, Serial1/2
sanjose2#sh ip route
D 192.168.72.0/24 [90/2172416] via 192.168.64.6, 00:01:23, Serial1/0
192.168.64.0/24 is variably subnetted, 3 subnets, 2 masks
D 192.168.64.0/30 [90/2681856] via 192.168.64.6, 00:34:34, Serial1/0
D 192.168.64.0/24 is a summary, 00:01:23, Null0
C 192.168.64.4/30 is directly connected, Serial1/0
C 192.168.1.0/24 is directly connected, FastEthernet0/0
sanjose1#show ip route
Gateway of last resort is not set
D 192.168.72.0/24 [90/2172416] via 192.168.64.2, 00:01:57, Serial1/0
192.168.64.0/24 is variably subnetted, 3 subnets, 2 masks
C 192.168.64.0/30 is directly connected, Serial1/0
D 192.168.64.0/24 is a summary, 00:01:57, Null0
D 192.168.64.4/30 [90/2681856] via 192.168.64.2, 00:33:20, Serial1/0
C 192.168.1.0/24 is directly connected, FastEthernet0/0
测试联通性
在不同的路由器上
ping
非直连路由
sanjose1#ping 192.168.72.1
通
westaman#ping 192.168.1.2
通
sanjose2#ping 192.168.72.1
通
给论
路由表没有问题
eigrp
配置正确
sanjose2
的拓扑表
sanjose2#show ip eigrp topology all-
IP-EIGRP Topology Table for AS(100)/ID(192.168.64.5)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
r - reply Status, s - sia Status
P 192.168.72.0/24, 1 successors, FD is 2172416, serno 3
via 192.168.64.6 (2172416/28160), Serial1/0
via 192.168.1.1 (2174976/2172416), FastEthernet0/0
P 192.168.64.0/24, 1 successors, FD is 2169856, serno 5
via Summary (2169856/0), Null0
via 192.168.1.1 (2172416/2169856), FastEthernet0/0
P 192.168.64.0/30, 1 successors, FD is 2681856, serno 2
via 192.168.64.6 (2681856/2169856), Serial1/0
P 192.168.64.4/30, 1 successors, FD is 2169856, serno 1
via Connected, Serial1/0
P 192.168.1.0/24, 1 successors, FD is 28160, serno 4
via Connected, FastEthernet0/0
问题
:
有两条路径到达
192.168.72.0
网络
在前面的路由表中选则的下一跳地址为
192.168.64.6
因为这条路由路径
FD
、
RD
都要小于另一条
3.
如果出现问题
把
s1/0
的接口
shutdown
4.
结果
D 192.168.72.0/24 [90/2174976] via 192.168.1.1, 00:00:00, FastEthernet0/0
192.168.64.0/24 is variably subnetted, 2 subnets, 2 masks
D 192.168.64.0/24 is a summary, 00:10:42, Null0
C 192.168.64.4/30 is directly connected, Serial1/0
C 192.168.1.0/24 is directly connected, FastEthernet0/0
立刻启用
192.168.1.1
这条路由
再把
s1/0
的接口打开
路由表如下
D 192.168.72.0/24 [90/2172416] via 192.168.64.6, 00:00:53, Serial1/0
192.168.64.0/24 is variably subnetted, 3 subnets, 2 masks
D 192.168.64.0/30 [90/2681856] via 192.168.64.6, 00:00:53, Serial1/0
D 192.168.64.0/24 is a summary, 00:00:55, Null0
C 192.168.64.4/30 is directly connected, Serial1/0
C 192.168.1.0/24 is directly conected, FastEthernet0/0
结论
:192.168.1.1
可以起到容错的作用
,
是一条备份路由条目
!
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