Examples
- Port that connect to other switch
- Port Uplink
- Port that connect to router (Router traffic between VLAN)
(config-if)#switchport trunk encapsulation [isl | dot1q]
(config-if)#switchport mode trunk
#switchport trunk allow vlan 10-15
#show interface giga0/1 switchport (View Trunk port status)
#show interface trunk (trunks port status)