visualisation
	router 172.23.100.1
		position 1430 210

	router 172.23.100.2
		position 1430 750

	router 172.23.100.3
		position 850 110

	router 172.23.100.4
		position 850 330

	router 172.23.100.5
		position 850 660

	router 172.23.100.6
		position 850 880

	router 172.23.100.7
		position 270 750

	router 172.23.100.8
		position 270 220

	router 172.23.100.9
		position 90 620

	router 172.23.100.10
		position 1650 340

	stubnet 172.23.7.0/24
		router 172.23.100.10
		position 1860 480

	network 172.23.1.0/24
		dr 172.23.100.9
		position 280 480

	network 172.23.2.0/24
		dr 172.23.100.8
		position 580 200

	network 172.23.3.0/24
		dr 172.23.100.7
		position 580 780

	network 172.23.4.0/24
		dr 172.23.100.4
		position 1150 200

	network 172.23.5.0/24
		dr 172.23.100.6
		position 1150 780

	network 172.23.6.0/24
		dr 172.23.100.10
		position 1430 480