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@ -1170,4 +1170,11 @@ Routing Protocol is “eigrp 150”
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Distance: internal 90 external 170
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```
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该倍数是一个可变的整数, 告诉路由器在那些有着低于最小度量值乘以该倍数的那些路由上,进行负载均衡(The multiplier is a variable integer that tells the router to load share across routes that have a metric that is less than the minimum metric multiplied by the multiplier)。比如,在指定了5的变化时(specifying a variance of 5),就指示路由器在那些度量值低于最小度量值5倍的路由上,进行负载均衡。在使用了`variance`命令,同时指定了除开1之外的倍数时,该路由器就将在这些满足条件的路由上,按照各条路由的度量值,成比例的分配流量。也就是说,对那些有着较低度量值的路由,比起那些有着较高度量值的路由,要经由其发送更多的流量。
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下图36.11演示了一个基本的运行EIGRP的网络。其中的路由器R1和R2,是通过背靠背的串行链路连接起来的(R1 and R2 are connected via back-to-back Serial links)。两台路由器间的链路`150.1.1.0/24`,有着1024Kbps的带宽。两台路由器之间的`150.2.2.0/24`链路,有着768Kpbs的带宽。路由器R1是通过EIGRP将`172.16.100.0/24`前缀,通告给R2的。
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*图 36.11 -- 掌握EIGRP的非等价负载均衡,Understanding EIGRP Variance*
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基于
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