Cisco(config-if)#switchport trunk encapsulation dot1q //指定trunk封装协议
Cisco(config-if)#switchport mode trunk //配置端口为trunk模式
Cisco(config-if)#switchport trunk native vlan 10 //配置native vlan
Cisco(config)#vlan dot1q tag native //对native vlan打标签，默认时vlan 1，native vlan所属vlan在经过trunk时不打标签
Cisco(config-if)#switchport nonegotiate //关闭接口DTP模式
Cisco(config-if)#switchport trunk allowed vlan remove 10 //不放行vlan 10，默认放行vlan 1-4094
Cisco(config)#vtp mode server //配置vtp模式为服务器
Cisco(config)#vtp mode client //配置vtp模式为客户端
Cisco(config)#vtp domain abc123 //配置vtp域
Cisco(config)#vtp password abc123 //配置vtp密码
