单臂路由
http://www.examw.com/cisco/Files/2011-6/16/32461252.jpg 一、配置交换机Switch>en ----进入特权模式
Switch#config t ----进入全局配置模式
Enter configuration commands, one per line. End with CNTL/Z.
Switch（config）#vlan 10 ----配置第一个vlan
Switch（config-vlan）#name 10 ----给vlan命名
Switch（config-vlan）#exit
Switch（config）#vlan 20 ----配置第一个vlan
Switch（config-vlan）#name 20 ----给vlan命名
Switch（config-vlan）#exit
Switch（config）#int f0/1 ----进入f0/1端口
Switch（config-if）#switchport access vlan 10 ----把端口分配给vlan10
Switch（config-if）#exit
Switch（config）#int f0/11
Switch（config-if）#switchport access vlan 20
Switch（config-if）#exit
Switch（config）#int f0/24
Switch（config-if）#switchport mode trunk--配置f0/24为TRUNK模式
Switch（config-if）#exit
二、 配置路由器
Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router（config）#int f0/0 ----进入f0/0端口
Router（config-if）#no ip add ----不配置IP地址
Router（config-if）#no shutdown ----开启端口
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up
Router（config-if）#exit
Router（config）#int f0/0.1 ----配置子接口
%LINK-5-CHANGED: Interface FastEthernet0/0.1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.1, changed state to up
Router（config-subif）#encapsulation dot1Q 10 ----配置dot1Q协议
Router（config-subif）#ip address 192.168.1.254 255.255.255.0
Router（config-subif）#no shutdown
Router（config-subif）#exit
Router（config）#int f0/0.2
%LINK-5-CHANGED: Interface FastEthernet0/0.2, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.2, changed state to up
Router（config-subif）#encapsulation dot1Q 20
Router（config-subif）#ip add 192.168.2.254 255.255.255.0
Router（config-subif）#no shutdown
Router（config-subif）#exit
Router（config）#
三、 验证
P1的IP地址
P2的IP地址
P1能够ping通P2，P2能够ping通P1则配置成功。
http://www.examw.com/cisco/Files/2011-6/16/32462730.jpg
http://www.examw.com/cisco/Files/2011-6/16/32468029.jpg
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