交换基础 VLAN TRUNK VTP

两台交换机互连，每台交换机下有两台pc（路由器做交换机添加交换模块，路由器做pc关闭路由功能）
第一台交换机下的pc1 f0/0:ip地址为192.168.10.1 vlan10，pc2 f0/0:192.168.20.1 vlan20，第二天交换机下的pc3 f0/0:ip地址为

192.168.10.2 vlan10，pc4 f0/0:192.168.20.2 vlan20 sw1 

R3(config)#no ip routing
R3(config)#int f0/0
R3(config-if)#ip add 192.168.10.1 255.255.255.0
R3(config-if)#no shut
R3(config-if)#end

R4(config)#no ip routing
R4(config)#int f0/0
R4(config-if)#ip add 192.168.20.1 255.255.255.0
R4(config-if)#no shut
R4(config-if)#end

R5(config)#no ip routing
R5(config)#int f0/0
R5(config-if)#ip add 192.168.20.2 255.255.255.0
R5(config-if)#no shut
R5(config-if)#end

R6(config)#no ip routing
R6(config)#int f0/0
R6(config-if)#ip add 192.168.20.2 255.255.255.0
R6(config-if)#no shut
R6(config-if)#end

R1#vlan database
R1(vlan)#vlan 10
VLAN 10 added:
    Name: VLAN0010
R1(vlan)#vlan 20
VLAN 20 added:
    Name: VLAN0020
R1(vlan)#exit
R1#conf t
R1(config)#int f0/0
R1(config-if)#switchport mode access
R1(config-if)#switchport access vlan 10
R1(config-if)#int f0/1
R1(config-if)#switchport mode access
R1(config-if)#switchport access vlan 20
R1(config-if)#end
R1(config)#int f0/15
R1(config-if)#switchport trunk encapsulation dot1q
R1(config-if)#switchport mode trunk
R1(config-if)#end

R2#vlan database
R2(vlan)#vlan 10
VLAN 10 added:
    Name: VLAN0010
R2(vlan)#vlan 20
VLAN 20 added:
    Name: VLAN0020
R2(vlan)#exit
R2#conf t
R2(config)#int f0/0
R2(config-if)#switchport mode access
R2(config-if)#switchport access vlan 10
R2(config-if)#int f0/1
R2(config-if)#switchport mode access
R2(config-if)#switchport access vlan 20
R2(config-if)#end
R2(config)#int f0/15
R2(config-if)#switchport trunk encapsulation dot1q
R2(config-if)#switchport mode trunk
R2(config-if)#end