Adding a router on a stick - liabilityissue/Net-150 GitHub Wiki
This concept is router on a stick. You will need to create sub-interfaces on a router for your VLANS. These are virtual interfaces and on each sub-interface you can configure an IP address.
From our lab:
On 3rd Floor Switch Only:
Go to Config Tab GigabitEthernet0/1 and change to Trunk
Connect Router to GigabitEthernet0/1 on 3rd Floor Switch using a straight-through cable
If all goes well, all PC's should now be able to ping!