ping結果圖
switch 0上配置：
vlan 10
exit
interface range f0/1-2
switchport access vlan 10
exit
interface gigabitEthernet 1/1
switchport trunk allowed vlan all 允許所有VLAN通過
exit
interface gigabitEthernet 1/1
switchport mode trunk 配置該接口爲trunk模式
exit
switch 1上配置：
vlan 20
exit
interface range f0/1-2
switchport access vlan 20
exit
interface gigabitEthernet 1/1
switchport trunk allowed vlan all 允許所有VLAN通過
exit
interface gigabitEthernet 1/1
switchport mode trunk
exit
核心交換配置：
vlan 10
exit
vlan 20
exit
interface fastEthernet f0/1
switchport trunk allowed vlan all 允許所有VLAN通過
switchport mode trunk
exit
interface fastEthernet f0/2
switchport trunk allowed vlan all 允許所有VLAN通過
switchport mode trunk
exit
ip routing 開啓路由功能
interface vlan 10
ip address 192.168.1.1 255.255.255.0 配置模式虛擬端口
exit
interface vlan 20
ip address 192.168.2.1 255.255.255.0 配置模式虛擬端口
exit