R１:
R１>enable
R１(config)#interface fastEthernet 0/0
R１(config-if)#ip address 192.168.1.254 255.255.255.0
R１(config-if)#no shutdown
R１(config-if)#exit
R１(config)#interface serial 0/1/0
R１(config-if)#ip address 192.168.2.1 255.255.255.0
R１(config-if)#no shutdown
R１(config-if)#clock rate 64000
R２:
R２>en
R２#conf t
R２(config)#int s
R２(config-if)#ip add 192.168.2.2 255.255.255.0
R２r(config-if)#no shutdown
R２(config-if)#clock rate 64000
R２#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
R２(config)#int f0/0
R２(config-if)#ip address 192.168.3.254 255.255.255.0
R２r(config-if)#no shutdown
这时再给PC１和PC２配置ip
PC0:192.168.1.1
PC1:192.168.3.1
配置过ＩＰ以后我们来测试一下连通性：
PC1与网关：
PC２>ping 192.168.3.254
Pinging 192.168.3.254 with 32 bytes of data:
Reply from 192.168.3.254: bytes=32 time=78ms TTL=255
Reply from 192.168.3.254: bytes=32 time=31ms TTL=255
Reply from 192.168.3.254: bytes=32 time=31ms TTL=255
Reply from 192.168.3.254: bytes=32 time=31ms TTL=255
Ping statistics for 192.168.3.254:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 31ms, Maximum = 78ms, Average = 42ms
OK正常
PC1与网关：
PC１>ping 192.168.1.254
Pinging 192.168.1.254 with 32 bytes of data:
Reply from 192.168.1.254: bytes=32 time=62ms TTL=255
Reply from 192.168.1.254: bytes=32 time=31ms TTL=255
Reply from 192.168.1.254: bytes=32 time=32ms TTL=255
Reply from 192.168.1.254: bytes=32 time=31ms TTL=255
Ping statistics for 192.168.1.254:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 31ms, Maximum = 62ms, Average = 39ms
OK正常
两个路由器直接的通讯：
R２#ping 192.168.2.1
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.2.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 16/28/32 ms
ＯＫ正常
PC1与PC2：
PC１>ping 192.168.3.1
Pinging 192.168.3.1 with 32 bytes of data:
Reply from 192.168.1.254: Destination host unreachable.
Reply from 192.168.1.254: Destination host unreachable.
Reply from 192.168.1.254: Destination host unreachable.
Reply from 192.168.1.254: Destination host unreachable.
Ping statistics for 192.168.3.1:
Packets: Sent = 4, Received = 0, Lost = 4 (100% loss),
目标主机不可达
这时为什么呢？因为PC双方根本就不知道对方在哪，所以就无法到达，我们在来看一下路由表：
Ｒ１：
C 192.168.1.0/24 is directly connected, FastEthernet0/0
C 192.168.2.0/24 is directly connected, Serial0/1/0
这个路由表里根本就没有记录192.168.3.0网段的地址，我们在来看一下Ｒ２的路由表：
C 192.168.2.0/24 is directly connected, Serial
C 192.168.3.0/24 is directly connected, FastEthernet0/0
这里也没有192.168.1.0网段的地址；所以嘛，这两个网段就没有办法访问，那怎么才能访问呢？
这就用到要设置静态路由了
Ｒ１：
Router(config)#ip route 192.168.3.0 255.255.255.0 192.168.2.2
192.168.3.0是R1需要学习的目标网络地址，192.168.2.2为下一跳地址或者接这个路由信息出去的接口
Ｒ２：
Router(config)#ip route 192.168.1.0 255.255.255.0 192.168.2.1
同上
这时我们再分别看R1和R2的路由表里有没有对方的网段信息：
Ｒ１：
Router#show ip route
C 192.168.1.0/24 is directly connected, FastEthernet0/0
C 192.168.2.0/24 is directly connected, Serial0/1/0
S 192.168.3.0/24 [1/0] via 192.168.2.2
Ｒ２：Router#show ip route
Router#show ip route
S 192.168.1.0/24 [1/0] via 192.168.2.1
C 192.168.2.0/24 is directly connected, Serial
C 192.168.3.0/24 is directly connected, FastEthernet0/0
这时彼此都有对方的网段信息了，这时我们再来测试一下PC1和PC2能否正常通讯：
PC１>ping 192.168.3.1
Pinging 192.168.3.1 with 32 bytes of data:
Reply from 192.168.3.1: bytes=32 time=93ms TTL=126
Reply from 192.168.3.1: bytes=32 time=94ms TTL=126
Reply from 192.168.3.1: bytes=32 time=94ms TTL=126
Reply from 192.168.3.1: bytes=32 time=93ms TTL=126
Ping statistics for 192.168.3.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 93ms, Maximum = 94ms, Average = 93ms
ＯＫ。
好了，谢谢大家，实验做到这里就完成了，谢谢观看，下次再见。