三、配置静态路由
    方  法 一：使用直连的下一路由的接口地址
    实验拓扑：
1、ip地址表：
                       R1          S2/0         192.168.10.1/24 
                       R2          S2/0         192.168.10.2/24 
                       R2          S3/0         192.168.20.1/24 
                       R3          S2/0         192.168.20.2/24 
2、
R1的配置：
Router>en
Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#hostname R1
R1(config)#interface serial 2/0//进入S2/0
R1(config-if)#ip address 192.168.10.1 255.255.255.0//接口配置ip
R1(config-if)#no shutdown//激活接口
%LINK-5-CHANGED: Interface Serial2/0, changed state to down
R1(config-if)#exit
R1(config)#ip route 192.168.20.0 255.255.255.0 192.168.10.2//访问20网段的路由指向R2
                                                                                                         S2/0
R1(config)#exit
%SYS-5-CONFIG_I: Configured from console by console
R1#writ
Destination filename [startup-config]?
Building configuration...
[OK]
R1#
 
R2的配置：
Router>en
Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#hostname R2
R2(config)#interface serial 2/0
R2(config-if)#ip address 192.168.10.2 255.255.255.0
R2(config-if)#no shutdown//激活接口，此时本口与对端口处于up状态
%LINK-5-CHANGED: Interface Serial2/0, changed state to up
R2(config-if)#clock rate 64000//设置时钟频率为64000
R2(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to up
R2(config-if)#exit
R2(config)#interface serial 3/0
R2(config-if)#ip address 192.168.20.1 255.255.255.0
R2(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial3/0, changed state to down
R2(config-if)#clock rate 64000
R2(config-if)#exit
R2(config)#exit
%SYS-5-CONFIG_I: Configured from console by console
R2#write
Destination filename [startup-config]?
Building configuration...
[OK]
R2#
 
     R3的配置：
Router>en
Router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
Router(config)#hostname R3
R3(config)#interface serial 2/0
R3(config-if)#ip address 192.168.20.2 255.255.255.0
R3(config-if)#no shutdown
%LINK-5-CHANGED: Interface Serial2/0, changed state to up
R3(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial2/0, changed state to up
R3(config-if)#exit
R3(config)#exit
%SYS-5-CONFIG_I: Configured from console by console
R3#write
Destination filename [startup-config]?
Building configuration...
[OK]
R3#
 
验证配置：
R1#ping 192.168.10.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.10.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 68/79/104 ms
R1#ping 192.168.10.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.10.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 34/39/45 ms
R1#ping 192.168.20.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.20.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 34/37/42 ms
R1#ping 192.168.20.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.20.2, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
R1#
//R1 ping 192.168.20.2 不通，原因是R3上没有设置去192.168.1.0/24网段的路由
 
R3的配置：
R3(config)#ip route 192.168.10.0 255.255.255.0 192.168.20.1
 
验证配置：
R1#ping 192.168.20.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.20.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 69/77/88 ms
R1#
 
不知道写没写清楚，希望大家多提出意见和建议，小弟不胜感激！！！！！