一、拓扑图
二、设备
1. cisco 3560
2. cisco 2960
vlan 10 192.168.10.0/24
vlan 20 192.168.20.0/24
三、配置步骤
A 交换机上：
conf t
vlan 10
vlan 20
interface Vlan 10
ip address 192.168.10.1 255.255.255.0
interface Vlan 20
ip address 192.168.20.1 255.255.255.0
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
interface FastEthernet0/1
switchport trunk encapsulation dot1q
switchport mode trunk
ip routing
B 交换机上：
conf t
vlan 10
vlan 20
interface FastEthernet0/1
switchport trunk allowed vlan 10,20
switchport mode trunk
interface FastEthernet0/2
switchport access vlan 10
switchport mode access
interface FastEthernet0/3
switchport access vlan 20
switchport mode access
C交换机上： 同B
PC机器上 ，指定网关，其他类似
四、验证
vlan 间相通