实验目的
通过本次试验，可以掌握如下技能：
1.DCE端时钟设置
2.路由表的概念
3.ip router命令使用
4.根据需求正确配置将台路由
实验拓扑
实验步骤
我们要使PC0跟PC1网络能够相互通信，按如下所述操作。
步骤1：在各个路由器上配置IP地址，保证直连链路的连通性
R0设置ip地址
Router>en
Router#conf t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#hostname R0
R0(config)#interface f0/0
R0(config-if)#ip add 192.168.1.1 255.255.255.0
R0(config-if)#no shutdown
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
R0(config-if)#exit
R0(config)#interface serial 0/1/0
R0(config-if)#ip add 10.1.0.1 255.255.255.0
R0(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial0/1/0, changed state to down
R0(config-if)#end
R0#show controllers serial0/1/0 （查看DCE端命令）
Interface Serial0/1/0
Hardware is PowerQUICC MPC860
DCE V.35, TX and RX clocks detected （红色表示为DCE端）
idb at 0x81081AC4, driver data structure at 0x81084AC0
SCC Registers:
General [GSMR]=0x2:0x00000000, Protocol-specific [PSMR]=0x8
Events [SCCE]=0x0000, Mask [SCCM]=0x0000, Status [SCCS]=0x00
Transmit on Demand [TODR]=0x0, Data Sync [DSR]=0x7E7E
Interrupt Registers:
......
R0(config)#interface serial 0/1/0
R0(config-if)#clock rate 4800 (在DCE端配置时钟）
R1配置如下
R1(config)#interface serial 0/1/0
R1(config-if)#ip add 10.1.0.2 255.255.255.0
R1(config-if)#no shutdown
R1(config-if)#exit
R1(config)#interface serial 0/1/1
R1(config-if)#ip add 10.2.0.1 255.255.255.0
R1(config-if)#no shutdown
R2配置如下
R2(config)#interface serial 0/1/1
R2(config-if)#ip add 10.2.0.2 255.255.255.0
R2(config-if)#no shutdown
R2(config-if)#exit
R2(config)#interface serial 0/1/0
R2(config-if)#clock rate 4800
R2(config-if)#ip add 192.168.2.1 255.255.255.0
R2(config-if)#no shutdown
步骤2：在R0路由器上配置静态路由
R0(config)#ip route 10.2.0.0 255.255.255.0 10.1.0.2
（这里是指R0路由器访问10.2.0.0网段，下一跳IP地址是10.1.0.2）
R0(config)#ip route 192.168.2.0 255.255.255.0 Serial0/1/0
（这里是指R0路由器访问 192.168.2.0网段，下一跳接口是R0的Serial0/1/0）
步骤3：R1上配置静态路由
R1(config)#ip route 192.168.1.0 255.255.255.0 10.1.0.1
R1(config)#ip route 192.168.2.0 255.255.255.0 10.2.0.2
步骤4：R2上配置静态路由
R2(config)#ip route 10.1.0.0 255.255.255.0 10.2.0.1
R2(config)#ip route 192.168.1.0 255.255.255.0 Serial0/3/0
试验调试
在R2上查看路由表
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 not set
10.0.0.0/24 is subnetted, 2 subnets
S 10.1.0.0 [1/0] via 10.2.0.1 （S表示静态路由，C表示直连网络）
C 10.2.0.0 is directly connected, Serial0/3/0
S 192.168.1.0/24 is directly connected, Serial0/3/0
C 192.168.2.0/24 is directly connected, FastEthernet0/0
在R1上查看路由表
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, 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
10.0.0.0/24 is subnetted, 2 subnets
C 10.1.0.0 is directly connected, Serial0/1/0
C 10.2.0.0 is directly connected, Serial0/1/1
S 192.168.1.0/24 [1/0] via 10.1.0.1
S 192.168.2.0/24 [1/0] via 10.2.0.2
在R0上查看路由表
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 not set
10.0.0.0/24 is subnetted, 2 subnets
C 10.1.0.0 is directly connected, Serial0/1/0
S 10.2.0.0 [1/0] via 10.1.0.2
C 192.168.1.0/24 is directly connected, FastEthernet0/0
S 192.168.2.0/24 is directly connected, Serial0/1/0
从PC0上pingPC1地址192.168.2.2
在PC1上ping PC0地址 192.168.1.1
实验总结
1.在写静态路由时，如果是点对点链路（如PPP封装的链路）采用网关地址和接口都是可以的
2.注意：如果是链路多路访问链路（如以太网）只可采用网关地址，即不能用
R2(config)#ip route 192.168.1.0 255.255.255.0 Serial0/3/0