6.4.3设置最大的路径数<?xml:namespace prefix = o ns = "urn:schemas-microsoft-com:office:office" />

最大是16，缺省是4。

在网络中配置并行的路径时应该小心谨慎。太多的并行路径在某个链路失效时会增加EIGRP收敛时间，这是因为邻居路由器的数据也增加了，因此增加了查询范围。

 

路由器都是执行和这两条路径的路两只成反比的负载均衡

 

呜呜~~ 没有现成的图，他丫的我想偷懒！可以不 可以不 可以不

不可以~

不想自己画图

真心的

 

实验

3条链路，2条做负载均衡，一条失效，第三条替代失效的链路

根据计算算出v等于11

Johnson#sh run | be eigrp

router eigrp 100

 variance 11

 network 172.18.0.0

 network 172.20.0.0

auto-summary

这边你可以看到所有的路由表

这边我们可以看到3条链路都在里面了

要满足情况要，只能有2条在链路中这样实现

router eigrp 100

 variance 11

 network 172.18.0.0

 network 172.20.0.0

 maximum-paths 2

 auto-summary

 

再次查看路由表

 
查看3条链路，2条做负载均衡，一条失效，第三条替代失效的链路

Johnson#debug eigrp neighbors

EIGRP Neighbors debugging is on

Johnson#sh ip route          

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static route

       o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

     172.18.0.0/16 is variably subnetted, 2 subnets, 2 masks

D       172.18.0.0/16 is a summary, 00:03:07, Null0

C       172.18.1.0/24 is directly connected, Loopback0

     172.20.0.0/16 is variably subnetted, 5 subnets, 3 masks

C       172.20.15.20/30 is directly connected, Serial1/2

C       172.20.15.16/30 is directly connected, Serial1/1

D       172.20.10.0/24 [90/2297856] via 172.20.15.14, 00:03:07, Serial1/0

                       [90/10639872] via 172.20.15.18, 00:03:07, Serial1/1

D       172.20.0.0/16 is a summary, 00:03:07, Null0

C       172.20.15.12/30 is directly connected, Serial1/0

 

Johnson#conf t

Johnson(config)#int s1/0

Johnson(config-if)#sh

*May  2 21:57:18.203: %DUAL-5-NBRCHANGE: IP-EIGRP(0) 100: Neighbor 172.20.15.14 (Serial1/0) is down: interface down

*May  2 21:57:18.211: EIGRP: Neighbor 172.20.15.14 went down on Serial1/0

*May  2 21:57:20.115: %LINK-5-CHANGED: Interface Serial1/0, changed state to administratively down

*May  2 21:57:21.115: %LINEPROTO-5-UPDOWN: Line protocol on Interface Serial1/0, changed state to down

Johnson#

Johnson#sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

       E1 - OSPF external type 1, E2 - OSPF external type 2

       i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

       ia - IS-IS inter area, * - candidate default, U - per-user static route

       o - ODR, P - periodic downloaded static route

 

Gateway of last resort is not set

 

     172.18.0.0/16 is variably subnetted, 2 subnets, 2 masks

D       172.18.0.0/16 is a summary, 00:03:28, Null0

C       172.18.1.0/24 is directly connected, Loopback0

     172.20.0.0/16 is variably subnetted, 5 subnets, 3 masks

C       172.20.15.20/30 is directly connected, Serial1/2

C       172.20.15.16/30 is directly connected, Serial1/1

D       172.20.10.0/24 [90/10639872] via 172.20.15.18, 00:00:09, Serial1/1

                       [90/20640000] via 172.20.15.22, 00:00:09, Serial1/2

D       172.20.0.0/16 is a summary, 00:00:09, Null0

D       172.20.15.12/30 [90/21024000] via 172.20.15.22, 00:00:09, Serial1/2

                        [90/11023872] via 172.20.15.18, 00:00:09, Serial1/1

Johnson#un all

第一2个做负载均衡

第二替换过来了