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两台PC主机通过一台思科的3560-24PS三层交换机（Multilayers Switch）连接，拓扑图如下所示：
要实现VLAN间的路由功能，PC主机0的ip地址的设置如下图：
PC主机1的IP地址、子网掩码、默认网关和DNS服务器如下图：
下面是交换机上的配置命令：
Switch>en
Switch>enable
Switch#conf
Switch#configure
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#vl
Switch(config)#vlan 2
Switch(config-vlan)#exit
Switch(config)#in f0/1
Switch(config-if)#sw
Switch(config-if)#switchport m
Switch(config-if)#switchport mode a
Switch(config-if)#switchport mode access
Switch(config-if)#sw
Switch(config-if)#switchport a
Switch(config-if)#switchport access v
Switch(config-if)#switchport access vlan 1
Switch(config-if)#in f0/2
Switch(config-if)#sw
Switch(config-if)#switchport m
Switch(config-if)#switchport mode a
Switch(config-if)#switchport mode access
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Switch(config-if)#sw
Switch(config-if)#switchport a
Switch(config-if)#switchport access v
Switch(config-if)#switchport access vlan 2
Switch(config-if)#exit
Switch(config)#ip routing
Switch(config)#in vl
Switch(config)#in vlan 1
Switch(config-if)#ip add 172.16.1.1 255.255.255.0
Switch(config-if)#no shu
Switch(config-if)#no shutdown
%LINK-5-CHANGED: Interface Vlan1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan1, changed state to up
Switch(config-if)#exit
Switch(config)#in vl
Switch(config)#in vlan 2
%LINK-5-CHANGED: Interface Vlan2, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to up
Switch(config-if)#ip add 172.16.2.1 255.255.255.0
Switch(config-if)#no shu
Switch(config-if)#no shutdown
Switch(config-if)#exit
Switch(config)#
Switch#
%SYS-5-CONFIG_I: Configured from console by console | 
