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d36-EIGRP.md
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d36-EIGRP.md
@ -1909,4 +1909,40 @@ Sending 5, 100-byte ICMP Echos to 10.2.2.2, timeout is 2 seconds:
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Success rate is 0 percent (0/5)
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```
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而要解决这个问题,则有两种方案,如下:
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- 在两台路由器上手动配置`10.x.x.x/24`的静态路由
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- 关闭EIGRP的自动有类网络汇总,Disable EIGRP automatic classful network summarisation
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第一个选项是相当简单粗暴基础的(very basic)。因此,静态路由配置不具备可伸缩性,且在大型网络中需要大量费时费力的配置。而第二选项,也就是**推荐做法**,除了具备伸缩性,比起第一选项只需较少的时间精力。**通过执行`no auto-summary`命令**,就可将自动汇总予以关闭(**较新版本的IOS中,该特性已被默认关闭了**), 如下所示:
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```
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R1(config)#router eigrp 150
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R1(config-router)#no auto-summary
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R1(config-router)#exit
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R2(config)#router eigrp 150
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R2(config-router)#no auto-summary
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R2(config-router)#exit
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```
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此配置的结果,就是主要网络上的那些具体子网,在两台路由器上都有通告。不会生成汇总路由,如下所示:
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```
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R2#show ip route eigrp
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10.0.0.0/24 is subnetted, 2 subnets
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D 10.1.1.0 [90/2172416] via 150.1.1.1, 00:01:17, Serial0/0
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```
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这些`10.x.x.x/24`子网之间的连通性,可使用一个简单的`ping`操作,加以验证,如下所示:
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```
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R2#ping 10.1.1.1 source 10.2.2.2 repeat 10
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Type escape sequence to abort.
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Sending 10, 100-byte ICMP Echos to 10.1.1.1, timeout is 2 seconds:
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Packet sent with a source address of 10.2.2.2
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!!!!!!!!!!
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Success rate is 100 percent (10/10), round-trip min/avg/max = 1/3/4 ms
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```
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