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这次单臂路由的配置实验算是比较简单的了，所以拓扑图就不给出来了。下面只列出交换机、PC1和PC2的配置命令。最后通过Ping命令的返回值来确定实验成功。
路由器（router）的配置：
Router>
Router>
Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#int f0/0
Router(config-if)#no shutdown
Router(config-if)#int f0/0.2
Router(config-subif)#encapsulation dot1Q 2
Router(config-subif)#ip address 192.168.2.1 255.255.255.0
Router(config-subif)#no shutdown
Router(config-subif)#int f0/0.3
Router(config-subif)#en
Router(config-subif)#encapsulation d
Router(config-subif)#encapsulation dot1Q 3
Router(config-subif)#ip address 192.168.3.1 255.255.255.0
Router(config-subif)#no shutdown
Router(config-subif)#exit
Router(config)#
交换机（switc）的配置：
switch>
switch>en
switch#vlan data
switch(vlan)#vlan 2 name vlan002
VLAN 2 modified:
Name: vlan002
switch(vlan)#vlan 3 name vlan003
VLAN 3 added:
Name: vlan003
switch(config)#int f0/2
switch(config-if)#switchport mode access
switch(config-if)#switchport access vlan 2
switch(config-if)#no shutdown
switch(config-if)#int f0/3
switch(config-if)#switchport mode access
switch(config-if)#switchport access vlan 3
switch(config-if)#no shutdown
switch(config-if)#int f0/0
switch(config-if)#switchport mode trunk
switch(config-if)#no shutdown
PC1的配置：
ip address 192.168.2.2 255.255.255.0
ip default-gateway 192.168.2.1
PC2的配置：
ip address 192.168.3.2 255.255.255.0
ip default-gateway 192.168.3.1
主机PC1 ping 主机PC2：
PC1#
PC1#
PC1#ping 192.168.3.2
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.3.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/36/60 ms
PC1# | 
