copy running-config startup-config
show version
show run int <ref_interface>
do show run int <ref_interface>
INSWT155(config-if)#authentication port-control force-authorized
INSWT155(config-if)#switchport mode trunk
INSWT155(config-if)#switchport trunk native vlan 229
INSWT155(config-if)#switchport trunk allowed vlan 7,42,84,85,127,220,229