EIGRP 非等价负载均衡

EIGRP 既支持等价负载均衡 也支持非等价负载均衡 下面做非等价负载均衡 

首先要满足的是要有FS 如果只有succeesor 没有FS 那么就不会产生非等价不在均衡 

非等价负载均衡主要是调variance值  variance值*FS的FD>successor的FD就可以了。

从上面的拓扑图很容易看出去往1.1.1.1这个网段肯定是走以太网口 因为以太网的带宽大 

 

R3#show ip eigrp topology all-links 

IP-EIGRP Topology Table for AS(90)/ID(3.3.3.3)

P 1.1.1.1/32, 1 successors, FD is 409600, serno 31

        via 13.1.1.1 (409600/128256), Ethernet1/0

        via 23.1.1.2 (2809856/2297856), Serial0/1 AD<successor的FD 不能成为FS

P 2.2.2.2/32, 1 successors, FD is 2297856, serno 29

        via 23.1.1.2 (2297856/128256), Serial0/1

        via 13.1.1.1 (2323456/2297856), Ethernet1/0

P 3.3.3.3/32, 1 successors, FD is 128256, serno 8

        via Connected, Loopback0

P 12.1.1.0/24, 1 successors, FD is 2195456, serno 32

        via 13.1.1.1 (2195456/2169856), Ethernet1/0

        via 23.1.1.2 (2681856/2169856), Serial0/1

P 13.1.1.0/24, 1 successors, FD is 281600, serno 24

        via Connected, Ethernet1/0

P 23.1.1.0/24, 1 successors, FD is 2169856, serno 1

        via Connected, Serial0/1

我们就要通过调整K值来让它成为FS 我们调整延迟 把以太口的延迟调整为100000

R3(config)#int e1/0

R3(config-if)#delay 10000 

重新查看拓扑表

 

P 1.1.1.1/32, 1 successors, FD is 2809856, serno 45

        via 23.1.1.2 (2809856/2297856), Serial0/1

        via 13.1.1.1 (2944000/128256), Ethernet1/0 AD<successor的FD 成为了FS 

现在我们可以做非等价负载均衡了 只需将variance值调整为2即可

 

R3(config)#router eigrp 90

R3(config-router)#variance 2

查看R3的路由表

 

R3#show ip route 

     1.0.0.0/32 is subnetted, 1 subnets

D       1.1.1.1 [90/2809856] via 23.1.1.2, 00:00:02, Serial0/1

                [90/2944000] via 13.1.1.1, 00:00:02, Ethernet1/0

     2.0.0.0/32 is subnetted, 1 subnets

D       2.2.2.2 [90/2297856] via 23.1.1.2, 00:00:02, Serial0/1

     3.0.0.0/32 is subnetted, 1 subnets

C       3.3.3.3 is directly connected, Loopback0

     23.0.0.0/24 is subnetted, 1 subnets

C       23.1.1.0 is directly connected, Serial0/1

     12.0.0.0/24 is subnetted, 1 subnets

D       12.1.1.0 [90/2681856] via 23.1.1.2, 00:00:02, Serial0/1

                 [90/4729856] via 13.1.1.1, 00:00:02, Ethernet1/0

     13.0.0.0/24 is subnetted, 1 subnets

C       13.1.1.0 is directly connected, Ethernet1/0

 

 

R3#show ip route 1.1.1.1 255.255.255.255

Routing entry for 1.1.1.1/32

  Known via "eigrp 90", distance 90, metric 2809856, type internal

  Redistributing via eigrp 90

  Last update from 13.1.1.1 on Ethernet1/0, 00:00:16 ago

  Routing Descriptor Blocks:

  * 23.1.1.2, from 23.1.1.2, 00:00:16 ago, via Serial0/1

      Route metric is 2809856, traffic share count is 240

      Total delay is 45000 microseconds, minimum bandwidth is 1544 Kbit

      Reliability 255/255, minimum MTU 1500 bytes

      Loading 1/255, Hops 2

    13.1.1.1, from 13.1.1.1, 00:00:16 ago, via Ethernet1/0

      Route metric is 2944000, traffic share count is 229

      Total delay is 105000 microseconds, minimum bandwidth is 10000 Kbit

      Reliability 255/255, minimum MTU 1500 bytes

      Loading 1/255, Hops 1

 

 

可以看出从s0/1发出240个包 e1/0发出229个包