距离矢量在不连续子网中的问题和解决办法

在默认情况下是这样滴：

R1#show ip route

Codes: C - connected, S - static, I - IGRP, 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, E - EGP

       i - IS-IS, 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

 

     172.16.0.0/24 is subnetted, 1 subnets

C       172.16.1.0 is directly connected, Serial0  à 没有学习到任何路由条目

     10.0.0 .0/24 is subnetted, 4 subnets

C       10.1.3 .0 is directly connected, Serial0

C       10.1.1 .0 is directly connected, Loopback0

 

处理完之后是这样滴：

R1#show ip route

Codes: C - connected, S - static, I - IGRP, 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, E - EGP

       i - IS-IS, 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

 

     172.16.0.0/24 is subnetted, 1 subnets

C       172.16.1.0 is directly connected, Serial0

     10.0.0 .0/24 is subnetted, 4 subnets

C       10.1.3 .0 is directly connected, Serial0

R       10.1.2 .0 [120/1] vi a 10.1.3 .2, 00:00:14, Serial0   à 已经学习到了路由

R       10.0.0 .0 [120/1] via 172.16.1.2, 00:00:14 , Serial0

C       10.1.1 .0 is directly connected, Loopback0

 

 

 

 

1、RIP的解决办法：加入第二地址
ip add x.x.x.x v.v.v.v secondary

 

2、EIGRP解决办法：关闭自动汇总

no auto-summary

 

 

自动汇总使距离矢量路由协议的通病。