A-A+
	使用4条静态路由实现全网互通的实验
这是一个采用4台路由器组成一个环形网络的默认路由实验,目的是为了实现4条静态路由器,并且全网实现互联互通。下面是拓扑图、简单说明和全部配置:
1:网络拓扑如下
实验要求:使用4条静态路由使得全网互通。
具体配置如下:
R0路由器
- r0#show running-config
 - hostname r0
 - interface Loopback0
 - ip address 5.5.5.5 255.255.255.0
 - !
 - interface FastEthernet0/0
 - no ip address
 - duplex auto
 - speed auto
 - shutdown
 - !
 - interface FastEthernet0/1
 - no ip address
 - duplex auto
 - speed auto
 - shutdown
 - !
 - interface Serial0/0/0
 - ip address 1.1.1.1 255.255.255.252
 - clock rate 9600
 - !
 - interface Serial0/0/1
 - ip address 4.4.4.2 255.255.255.252
 - clock rate 9600
 - !
 - interface Vlan1
 - no ip address
 - shutdown
 - !
 - ip classless
 - ip route 0.0.0.0 0.0.0.0 1.1.1.2
 - line con 0
 - line vty 0 4
 - login
 - r0#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 1.1.1.2 to network 0.0.0.0
 - 1.0.0.0/30 is subnetted, 1 subnets
 - C 1.1.1.0 is directly connected, Serial0/0/0
 - 4.0.0.0/30 is subnetted, 1 subnets
 - C 4.4.4.0 is directly connected, Serial0/0/1
 - 5.0.0.0/24 is subnetted, 1 subnets
 - C 5.5.5.0 is directly connected, Loopback0
 - S* 0.0.0.0/0 [1/0] via 1.1.1.2
 - r0#
 
R1路由器
- r1#show running-config
 - hostname r1
 - interface Loopback0
 - ip address 6.6.6.6 255.255.255.0
 - !
 - interface FastEthernet0/0
 - no ip address
 - duplex auto
 - speed auto
 - shutdown
 - !
 - interface FastEthernet0/1
 - no ip address
 - duplex auto
 - speed auto
 - shutdown
 - !
 - interface Serial0/0/0
 - ip address 1.1.1.2 255.255.255.252
 - !
 - interface Serial0/0/1
 - ip address 2.2.2.1 255.255.255.252
 - clock rate 9600
 - !
 - interface Vlan1
 - no ip address
 - shutdown
 - !
 - ip classless
 - ip route 0.0.0.0 0.0.0.0 2.2.2.2
 - line con 0
 - line vty 0 4
 - login
 - !
 - 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 2.2.2.2 to network 0.0.0.0
 - 1.0.0.0/30 is subnetted, 1 subnets
 - C 1.1.1.0 is directly connected, Serial0/0/0
 - 2.0.0.0/30 is subnetted, 1 subnets
 - C 2.2.2.0 is directly connected, Serial0/0/1
 - 6.0.0.0/24 is subnetted, 1 subnets
 - C 6.6.6.0 is directly connected, Loopback0
 - http://www.19216811.la
 - S* 0.0.0.0/0 [1/0] via 2.2.2.2
 - r1#
 
R2路由器
- r2#show running-config
 - hostname r2
 - interface Loopback0
 - ip address 7.7.7.7 255.255.255.0
 - !
 - interface FastEthernet0/0
 - no ip address
 - duplex auto
 - speed auto
 - shutdown
 - !
 - interface FastEthernet0/1
 - no ip address
 - duplex auto
 - speed auto
 - shutdown
 - !
 - interface Serial0/0/0
 - ip address 2.2.2.2 255.255.255.252
 - !
 - interface Serial0/0/1
 - ip address 3.3.3.1 255.255.255.252
 - !
 - interface Vlan1
 - no ip address
 - shutdown
 - !
 - ip classless
 - ip route 0.0.0.0 0.0.0.0 3.3.3.2
 - line con 0
 - line vty 0 4
 - login
 - !
 - !
 - !
 - end
 - r2#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 3.3.3.2 to network 0.0.0.0
 - 2.0.0.0/30 is subnetted, 1 subnets
 - C 2.2.2.0 is directly connected, Serial0/0/0
 - 3.0.0.0/30 is subnetted, 1 subnets
 - C 3.3.3.0 is directly connected, Serial0/0/1
 - 7.0.0.0/24 is subnetted, 1 subnets
 - C 7.7.7.0 is directly connected, Loopback0
 - S* 0.0.0.0/0 [1/0] via 3.3.3.2
 - r2#
 
R3路由器
- r3#show running-config
 - hostname r3
 - interface Loopback0
 - ip address 8.8.8.8 255.255.255.0
 - !
 - interface FastEthernet0/0
 - no ip address
 - duplex auto
 - speed auto
 - shutdown
 - !
 - interface FastEthernet0/1
 - no ip address
 - duplex auto
 - speed auto
 - shutdown
 - !
 - interface Serial0/0/0
 - ip address 4.4.4.1 255.255.255.252
 - !
 - interface Serial0/0/1
 - ip address 3.3.3.2 255.255.255.252
 - clock rate 9600
 - !
 - interface Vlan1
 - no ip address
 - shutdown
 - !
 - ip classless
 - ip route 0.0.0.0 0.0.0.0 4.4.4.2
 - line con 0
 - line vty 0 4
 - login
 - !
 - !
 - !
 - end
 - r3#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 4.4.4.2 to network 0.0.0.0
 - 3.0.0.0/30 is subnetted, 1 subnets
 - C 3.3.3.0 is directly connected, Serial0/0/1
 - 4.0.0.0/30 is subnetted, 1 subnets
 - C 4.4.4.0 is directly connected, Serial0/0/0
 - 8.0.0.0/24 is subnetted, 1 subnets
 - C 8.8.8.0 is directly connected, Loopback0
 - S* 0.0.0.0/0 [1/0] via 4.4.4.2
 
测试:用r0路由器ping r3路由器上的8.8.8.8
- r0#ping 8.8.8.8
 - Type escape sequence to abort.
 - Sending 5, 100-byte ICMP Echos to 8.8.8.8, timeout is 2 seconds:
 - !!!!!
 - Success rate is 100 percent (5/5), round-trip min/avg/max = 62/62/63 ms
 - r0#traceroute 8.8.8.8//追踪数据包的走向
 - Type escape sequence to abort.
 - Tracing the route to 8.8.8.8
 - 1 1.1.1.2 31 msec 31 msec 32 msec
 - 2 3.3.3.1 63 msec 47 msec 63 msec
 - 3 3.3.3.2 63 msec 62 msec 62 msec
 - r0#
 
实验总结:默认路由会给我们带来意想不到的好处。
