router

#node	city	y	x	
0	NA	60	60	
1	NA	60	40	
2	NA	60	20	
3	NA	60	0	
4	NA	60	-20	
5	NA	80	-40	
6	NA	60	-40	
7	NA	40	-40

link

# from      to	capacity	metric	delay	queue
0	    1	5Mbps		1	10ms	100
1	    2	1Mbps		1	10ms	100
2	    3	1Mbps		1	10ms	100
3	    4	5Mbps		1	10ms	100
4	    5	5Mbps		1	10ms	100
4	    6	5Mbps		1	10ms	100
4	    7	5Mbps		1	10ms	100