配置vlan

给主机配置IP地址，然后分别给两个交换机创建vlan 10 和vlan 20，接着进入接口模式（interface gi），把主机配置成vlan 10和vlan 20（access），接着两个交换机都用trunk模式

左边：主机1：IP地址192.168.10.1子网掩码255.255.255.0

          主机2：IP地址192.168.10.2子网掩码255.255.255.0

          主机3：IP地址192.168.20.1子网掩码255.255.255.0

          主机4：IP地址192.168.20.2子网掩码255.255.255.0

右边：主机1：IP地址192.168.10.3子网掩码255.255.255.0

           主机2：IP地址192.168.20.3子网掩码255.255.255.0

左边交换机：

sys

vlan 10

vlan 20

interface gi 1/0/1

port link-type access

port access vlan 10

interface gi 1/0/2

port link-type access

port access vlan 10

interface gi 1/0/3

port link-type access

port access vlan 20

interface gi 1/0/4

port link-type access 

port access vlan 20

qu

interface gi 1/0/48

port link-type trunk

port trunk permit vlan 10 20 

右边交换机:

sys

vlan 10

vlan 20

interface gi 1/0/1

port link-type access

port access vlan 10

interface gi 1/0/2

port link-type access

port access vlan 20

qu

interface gi 1/0/48

port link-type trunk 

port trunk permit vlan 10 20