int range fa 0/1 - 47
#switchport mode access
#switchport access vlan 200
#switchport protected
#switchport port-security
#switchport port-security maximum 1

#switchport port-security violation shutdown
eller (beroende på dagsform :P)
#switchport port-security violation protect


int fa 0/48
#switchport mode trunk
#switchport trunk encapsulation dot1Q
#switchport trunk allowed vlan 200