interface GigabitEthernet2/13
switchport access vlan 50
no snmp trap link-status !
interface GigabitEthernet2/14
switchport access vlan 50
no snmp trap link-status !
interface GigabitEthernet2/15
switchport access vlan 50
no snmp trap link-status !
interface GigabitEthernet2/16
switchport access vlan 50
no snmp trap link-status !
interface GigabitEthernet2/17
switchport access vlan 50
no snmp trap link-status !
interface GigabitEthernet2/18
switchport access vlan 50
no snmp trap link-status !
interface GigabitEthernet2/19
switchport access vlan 50
no snmp trap link-status !
interface GigabitEthernet2/20
switchport access vlan 50
no snmp trap link-status
!--不将GigabitEthernet2/20～24指定至任何VLAN !
interface GigabitEthernet3/1
switchport trunk encapsulation dot1q
！--启用802.1Q Trunk封装协议，即在该端口创建Trunk
switchport trunk allowed vlan 1-80
！--允许vlan 1-90在该中继线通讯
！--可以拒绝或允许某个VLAN访问该Trunk
！--确保未被授权的VLAN通过该Trunk，实现VLAN的访问安全
switchport mode trunk
！--将该端口设置为Trunk
description netcenter
no snmp trap link-status !
interface GigabitEthernet3/2
switchport access vlan 60
no snmp trap link-status
!--将端口GigabitEthernet3/2指定至VLAN 60 !
interface GigabitEthernet3/3
switchport access vlan 70
