静态路由与默认路由的配置（三路由二PC）

验工具：在模拟器中完成CISCO7200路由三台，PC2台
实验目的：PC1能PING同PC2

静态路由：由于需要管理员手动设置，除非管理员干预，静态路由不会发生变化。所以只适用与小型固定的拓扑结构

默认路由：设置默认路由能提高网络性能，一般用于末梢网络，也就是只有一个唯一的路径能够达到的网络。



R1
Router(config)#interface f0/0
Router(config-if)#ip address 192.168.1.1 255.255.255.0 设置IP
Router(config-if)#exit
Router(config)#interface f1/0
Router(config-if)#ip address 192.168.2.1 255.255.255.0
Router(config-if)#exit
Router(config)#ip route 192.168.3.0 255.255.255.0 192.168.2.2 设置静态地址
Router(config)#ip route 192.168.4.0 255.255.255.0 192.168.2.2
Router (config)#ip route 0.0.0.0 0.0.0.0 192.168.2.2 默认路由设置
Router (config)#exit
Router #show 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 192.168.2.2 to network 0.0.0.0 默认路由

S 192.168.4.0/24 [1/0] via 192.168.2.2 静态路由
C 192.168.1.0/24 is directly connected, FastEthernet0/0
C 192.168.2.0/24 is directly connected, FastEthernet1/0
S 192.168.3.0/24 [1/0] via 192.168.2.2 静态路由
S* 0.0.0.0/0 [1/0] via 192.168.2.2

R2
Router>
Router>en
Router#conf t
Router(config)#interface f0/0
Router(config-if)#ip add
Router(config-if)#ip address 192.168.2.2 255.255.255.0
Router(config-if)#exit
Router(config)#interface f1/0
Router(config-if)#ip address 192.168.3.1 255.255.255.0
Router(config-if)#exit
Router(config)#ip route 192.168.1.0 255.255.255.0 192.168.2.1
Router(config)#ip route 192.168.4.0 255.255.255.0 192.168.3.2
Router(config)#exit
Router #show 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

S 192.168.4.0/24 [1/0] via 192.168.3.2
S 192.168.1.0/24 [1/0] via 192.168.2.1
C 192.168.2.0/24 is directly connected, FastEthernet0/0
C 192.168.3.0/24 is directly connected, FastEthernet1/0

R3
Router(config)#interface f0/0
Router(config-if)#ip address 192.168.3.2 255.255.255.0
Router(config-if)#exit
Router(config)#interface f1/0
Router(config-if)#ip address 192.168.4.1 255.255.255.0
Router(config-if)#exit
Router(config)#ip route 192.168.2.0 255.255.255.0 192.168.3.1
Router(config)#ip route 192.168.1.0 255.255.255.0 192.168.3.1
Router (config)#ip route 0.0.0.0 0.0.0.0 192.168.3.1
Router #show 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 192.168.3.1 to network 0.0.0.0

C 192.168.4.0/24 is directly connected, FastEthernet1/0
S 192.168.1.0/24 [1/0] via 192.168.3.1
S 192.168.2.0/24 [1/0] via 192.168.3.1
C 192.168.3.0/24 is directly connected, FastEthernet0/0
S* 0.0.0.0/0 [1/0] via 192.168.3.1

检验



PC2能Ping通PC1证明实验成功。
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