在交换机上划分vlan
vlan10
vlan20
interface f0/2
switchport mode access
switchport access vlan 10
interface f0/3
switchport mode access
switchport access vlan 10
interface f0/1
switchport mode trunk
interface f0/1
no sh
interface f0/1.10
encapsulation dot1Q 10
ip address 172.16.10.1 255.255.255.0
然后配置pc的主机地址
