从上面开始，配置交换机
Enable
Switch(vlan)#
Switch(vlan)#vlan database
Switch(vlan)#vtp server
Switch(vlan)#vtp domain cisco
Switch(vlan)#vtp password123
Switch(vlan)#vlan2
Switch(vlan)#vlan3
Switch(vlan)#exit
Switch#configure terminal
Switch(config)#interface range fastEthetnet0/1-3 Switch(config-if-range)#shutdown
Switch(config-if-range)#switchport mode trunk Switch(config-if-range)#no shutdown
Switch(config-if-range)#exit
Switch(config)#interface fastEthernet0/24 Switch(config-if)#switchport mode trunk Switch(config)#no shutdown
Switch(config)#End
Switch(config)#line con0
Switch(config-line)#logging synchronous Switch(config-line)#no exec-timeout Switch(config)#exit
Switch(config)#no ip domain lookup Switch(config)#no cdp run
Switch(config)#end
Switch#vlan brief fa0/4在vlan1上
第二台交换机配置。

Switch#configure ter
Switch(config)#no ip domain lookup Switch(config)#no cdp run
Switch(config)#line con0
Switch(config-line)#no exec-timeout Switch(config-line)#logging synchronous Switch(config)#end
Switch(config)#interface fa0/24
Switch(config-if)#shutdown
Switch(config-if)#switchport mode trunk Switch(config-if)#no shutdown
Switch#vlan database
Switch(vlan)#vtp domain cisco
Switch(vlan)#vtp password123
Switch(vlan)exit
Switch#show vlan brief
Switch#configure te
Switch(config)#interface fa0/1
Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan2 Switch(config-if)#interface fa0/2
Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan3 Switch(config-if)#end
另一台
Switch#configure ter
Switch(config)#no ip domain lookup Switch(config)#no cdp run
Switch(config)#line con0
Switch(config-line)#no exec-timeout Switch(config-line)#logging synchronous Switch(config)#end
Switch(config)#interface fa0/24
Switch(config-if)#shutdown
Switch(config-if)#switchport mode trunk Switch(config-if)#no shutdown
Switch#vlan database
Switch(vlan)#vtp client
Switch(vlan)#vtp domain cisco
Switch(vlan)#vtp password123
Exit
Switch#show vlan brief
Switch#configure te
Switch(config)#interface fa0/1
Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan2 Switch(config-if)#interface fa0/2
Switch(config-if)#switchport mode access Switch(config-if)#switchport access vlan3 Switch(config-if)#end
第四台交换
Switch#configure ter
Switch(config)#no ip domain lookup Switch(config)#no cdp run
Switch(config)#line con0
Switch(config-line)#no exec-timeout Switch(config-line)#logging synchronous Switch(config)#end
Switch(config)#interface fa0/24
Switch(config-if)#shutdown
Switch(config-if)#switchport mode trunk Switch(config-if)#no shutdown
Switch#vlan database
Switch(vlan)#vtp client
Switch(vlan)#vtp domain cisco
Switch(vlan)#vtp password123
Exit
Switch#show vlan brief
Pc0；192.168.2.1
G:192.168.2.254
D:192.168.1.250
Pc1；192.168.3.1
G:192.168.3.254
D:192.168.1.250
Pc2；192.168.2.2
G:192.168.2.254
D:192.168.1.250
Pc3；192.168.3.2
G:192.168.3.254
D:192.168.1.250
Toute
route#configure ter
route(config)#no ip domain lookup
route(config)#no cdp run
route(config)#line con0
route(config-line)#no exec-timeout
route(config-line)#logging synchronous
route(config)#end
route(config)#interface fastEthernet0/0
route(config-if)#no shutdown
route(config-if)#no ip address
route(config-if)#exit
route(config)#interface fastEthernet0/0.1
route(config-subif)#description vlan1Native VLAN
route(config-subif)#encapsulation dot1Q1native
route(config-subif)#ip address192.168.1.254255.255.255.0 route(config-subif)#no shutdown
route(config-subif)#interface fastEthernet0/0.2
route(config-subif)#encapsulation dot1Q2
route(config-subif)#ip address192.168.2.254255.255.255.0 route(config-subif)#no shutdown
route(config-subif)#interface fastEthernet0/0.3
route(config-subif)#encapsulation dot1Q3
route(config-subif)#ip address192.168.3.254255.255.255.0 route(config-subif)#no shutdown
route#show ip interface brief
route#show ip route
Pc0客户端来ping。