将端口划分到VLan
[H3C-GigabitEthernet1/0/2]port access vlan 20
归类为trunk口,制定允许通过trunk的VLan号
[H3C-GigabitEthernet1/0/3]port link-type trunk
[H3C-GigabitEthernet1/0/3]port trunk permit vlan 10 20
[H3C-GigabitEthernet1/0/2]port access vlan 20
[H3C-GigabitEthernet1/0/3]port link-type trunk
[H3C-GigabitEthernet1/0/3]port trunk permit vlan 10 20