[ Controller ] { label: Controller\n172.30.15.10 } [ vlan1 ] { label: VLAN 1\n172.30.15.0/24 } [ router ] { label: Router\n172.30.15.1 } [ switch ] { label: Switch\n172.30.15.20 } [ Controller ] -- [ vlan1 ] -- [ router ] [ vlan1 ] -- [ switch ]