将两台电脑都设为自动获取IP，然后左边的加入vlan10,右边的加入vlan20

先配置左边交换机

 <H3C>system-view

[H3C]user-interface console 0
[H3C-line-console0]idle-timeout 0 0
[H3C-line-console0]exit
[H3C]vlan 10
[H3C-vlan10]port GigabitEthernet 1/0/9
[H3C-vlan10]exit
[H3C]interface Vlan-interface 10
[H3C-Vlan-interface10]ip address 192.168.10.1 24
[H3C-Vlan-interface10]exit
[H3C]dhcp enable
[H3C]vlan 20
[H3C-vlan20]exit
[H3C]interface Vlan-interface 20
[H3C-Vlan-interface20]ip address 192.168.20.1 24
[H3C-Vlan-interface20]exit
[H3C]dhcp server ip-pool 10
[H3C-dhcp-pool-10]network 192.168.10.0 mask 255.255.255.0
[H3C-dhcp-pool-10]dns-list 114.114.114.114 8.8.8.8
[H3C-dhcp-pool-10]gateway-list 192.168.10.1
[H3C-dhcp-pool-10]expired day 1
[H3C-dhcp-pool-10]quit

[H3C]dhcp server ip-pool 20
[H3C-dhcp-pool-20]network 192.168.20.0 mask 255.255.255.0
[H3C-dhcp-pool-20]dns-list 114.114.114.114 8.8.8.8
[H3C-dhcp-pool-20]gateway-list 192.168.20.1
[H3C-dhcp-pool-20]expired day 1
[H3C-dhcp-pool-20]quit
[H3C]interface GigabitEthernet 1/0/1
[H3C-GigabitEthernet1/0/1]port link-type trunk
[H3C-GigabitEthernet1/0/1]port trunk permit vlan all
[H3C-GigabitEthernet1/0/1]exit
[H3C]save force

[H3C]dis cur

再配置右边交换机：

<H3C>system-view
System View: return to User View with Ctrl+Z.
[H3C]line console 0
[H3C-line-console0]idle-timeout 0
[H3C-line-console0]save force
[H3C-line-console0]exit
[H3C]vlan 10 to 20
[H3C]interface GigabitEthernet 1/0/1
[H3C-GigabitEthernet1/0/1]port link-type trunk
[H3C-GigabitEthernet1/0/1]port trunk permit vlan all
[H3C-GigabitEthernet1/0/1]exit
[H3C]vlan 20
[H3C-vlan20]exit
[H3C]interface GigabitEthernet 1/0/9
[H3C-GigabitEthernet1/0/9]port access vlan 20
[H3C-GigabitEthernet1/0/9]exit
[H3C]save force

上面就是一个简单的vlan例子