Jakee_NB

步骤一：配置各路由器的IP地址，并使用ping命令确认直连接口相互可以ping通。

步骤二：在R1上配置到R2的回环接口的静态路由．

R1(config)#ip route 192.168.3.0 255.255.255.0 192.168.1.2
R1(config)#ip route 192.168.3.0 255.255.255.0 192.168.2.2

步骤三：分析：查看R1的路由表

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, 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

C 192.168.1.0/24 is directly connected, FastEthernet0/0
C 192.168.2.0/24 is directly connected, Serial1/1
S 192.168.3.0/24 [1/0] via 192.168.1.2
[1/0] via 192.168.2.2
R1#

步骤三：先删除原先路由，调整静态路由

R1(config)#no ip route 192.168.3.0 255.255.255.0 192.168.2.2
R1(config)#ip route 192.168.3.0 255.255.255.0 192.168.2.2 100

步骤四：再次检查路由表,发现路由器没有做均分负载

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, 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

C 192.168.1.0/24 is directly connected, FastEthernet0/0
C 192.168.2.0/24 is directly connected, Serial1/1
S 192.168.3.0/24 [1/0] via 192.168.1.2

步骤五：将R1的fa0/0的接口shutdown掉．再观察路由表

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, 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

C 192.168.2.0/24 is directly connected, Serial1/1
S 192.168.3.0/24 [100/0] via 192.168.2.2