关于EIGRP非等价负载均衡的问题？

ccnafasttrack

关于这张拓扑，R2和R3用serial线和快速以太网线连接，上面是Serial，2.0网络，下面是F1/0网络，3.0网络。
现在，我们将图上的所有接口都宣告进eigrp 90当中。查看路由表和配置信息：
Gateway of last resort is not set

      1.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        1.1.1.0/24 is directly connected, Loopback1
L        1.1.1.1/32 is directly connected, Loopback1
      3.0.0.0/24 is subnetted, 1 subnets
D        3.3.3.0 [90/2300416] via 192.168.1.2, 00:00:13, Serial2/0
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/24 is directly connected, Serial2/0
L        192.168.1.1/32 is directly connected, Serial2/0
D     192.168.2.0/24 [90/2681856] via 192.168.1.2, 00:00:42, Serial2/0
D     192.168.3.0/24 [90/2172416] via 192.168.1.2, 00:01:04, Serial2/0
R1#      



Gateway of last resort is not set

      1.0.0.0/24 is subnetted, 1 subnets
D        1.1.1.0 [90/2297856] via 192.168.1.1, 00:00:25, Serial2/0
      3.0.0.0/24 is subnetted, 1 subnets
D        3.3.3.0 [90/156160] via 192.168.3.2, 00:00:25, FastEthernet1/0
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/24 is directly connected, Serial2/0
L        192.168.1.2/32 is directly connected, Serial2/0
      192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.2.0/24 is directly connected, Serial2/1
L        192.168.2.1/32 is directly connected, Serial2/1
      192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.3.0/24 is directly connected, FastEthernet1/0
L        192.168.3.1/32 is directly connected, FastEthernet1/0
R2#




Gateway of last resort is not set

      1.0.0.0/24 is subnetted, 1 subnets
D        1.1.1.0 [90/2300416] via 192.168.3.1, 00:05:54, FastEthernet1/0
      3.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C        3.3.3.0/24 is directly connected, Loopback1
L        3.3.3.3/32 is directly connected, Loopback1
D     192.168.1.0/24 [90/2172416] via 192.168.3.1, 00:05:54, FastEthernet1/0
      192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.2.0/24 is directly connected, Serial2/1
L        192.168.2.2/32 is directly connected, Serial2/1
      192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.3.0/24 is directly connected, FastEthernet1/0
L        192.168.3.2/32 is directly connected, FastEthernet1/0
R3#

我们来看R2的路由表，去往R3上的3.3.3.3网络的走的是下面的快速以太网线缆，下一跳为192.168.3.2，但是现在呢我们想要其负载均衡。
我们在R2上show ip eigrp topology 查看可行后继路由条目：
R2#show ip eigrp topology
EIGRP-IPv4 Topology Table for AS(90)/ID(192.168.3.1)
Codes: P - Passive, A - Active, U - Update, Q - Query, R - Reply,
       r - reply Status, s - sia Status

P 192.168.3.0/24, 1 successors, FD is 28160
        via Connected, FastEthernet1/0
P 192.168.2.0/24, 1 successors, FD is 2169856
        via Connected, Serial2/1
P 192.168.1.0/24, 1 successors, FD is 2169856
        via Connected, Serial2/0
P 3.3.3.0/24, 1 successors, FD is 156160
        via 192.168.3.2 (156160/128256), FastEthernet1/0
        via 192.168.2.2 (2297856/128256), Serial2/1
P 1.1.1.0/24, 1 successors, FD is 2297856
        via 192.168.1.1 (2297856/128256), Serial2/0

R2#

发现有一条可行后继路由，通过2.2来走，我们用可行后继的FD去除以后继路由的FD等于14.多，然后取整为15.
router eigrp 90
variance 15
配置了如下命令之后，查看路由表：
Gateway of last resort is not set

      1.0.0.0/24 is subnetted, 1 subnets
D        1.1.1.0 [90/2812416] via 192.168.2.2, 00:00:05, Serial2/1
                 [90/2297856] via 192.168.1.1, 00:00:05, Serial2/0
      3.0.0.0/24 is subnetted, 1 subnets
D        3.3.3.0 [90/156160] via 192.168.3.2, 00:00:05, FastEthernet1/0
                 [90/2297856] via 192.168.2.2, 00:00:05, Serial2/1
      192.168.1.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.1.0/24 is directly connected, Serial2/0
L        192.168.1.2/32 is directly connected, Serial2/0
      192.168.2.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.2.0/24 is directly connected, Serial2/1
L        192.168.2.1/32 is directly connected, Serial2/1
      192.168.3.0/24 is variably subnetted, 2 subnets, 2 masks
C        192.168.3.0/24 is directly connected, FastEthernet1/0
L        192.168.3.1/32 is directly connected, FastEthernet1/0
R2#   

我们发现去往3.3.3.0网络正常的负载均衡了，但是去往1.1.1.0网络呢，怎么也多了一条路由，开始往R3方向走了，下一跳为2.2，这个不正确啊。
大家来看看，帮忙看下是什么原因？

@小蝴蝶

Router# show ve rsi on Router uptime is 20 weeks , 5 days , 33 minutes System returned to ROM by power-on

青春岁月

有收获，

likun

@小蝴蝶

ccnafasttrack

likun 发表于 2016-5-15 16:28

啊哈，那怎么解决？这是怎么回事？

ccnafasttrack

@小蝴蝶 发表于 2016-5-15 16:37

啊哈，那怎么解决？这是怎么回事？

ccnafasttrack

@小蝴蝶 发表于 2016-5-15 16:37
Router# show ve rsi on Router uptime is 20 weeks , 5 days , 33 minutes System returned to ROM by pow ...

啊哈，那怎么解决？这是怎么回事？

ccnafasttrack

@小蝴蝶 发表于 2016-5-15 16:37
Router# show ve rsi on Router uptime is 20 weeks , 5 days , 33 minutes System returned to ROM by pow ...

啊哈，那怎么解决？这是怎么回事？？

shenxian

我用GNS3 IOU做了这个实验，没有出现你这种问题呀。

      2.0.0.0/24 is subnetted, 1 subnets
D        2.2.2.0 [90/13556702] via 12.1.1.2, 00:01:19, Serial1/0
      3.0.0.0/24 is subnetted, 1 subnets
D        3.3.3.0 [90/1024640] via 31.1.1.3, 00:01:19, Ethernet0/1
                 [90/13556702] via 13.1.1.3, 00:01:19, Serial1/1

@小蝴蝶

shenxian 发表于 2016-5-15 19:43
我用GNS3 IOU做了这个实验，没有出现你这种问题呀。

      2.0.0.0/24 is subnetted, 1 subnets

那你现在问题解决了吗？

@小蝴蝶

ccnafasttrack 发表于 2016-5-15 16:48
啊哈，那怎么解决？这是怎么回事？？

你现在问题有解决了吗？

shenxian

@小蝴蝶 发表于 2016-5-18 11:36
那你现在问题解决了吗？

我做的没有出现你的这种问题

@小蝴蝶

那就不一样了

likun