proc nam_config {net} {
        $net node 0 circle
        $net node 1 circle
        $net node 2 circle
        $net node 3 circle

        mklink $net 0 1 1.5Mb 10ms right
        mklink $net 1 2 1.5Mb 10ms right-up
        mklink $net 1 3 1.5Mb 10ms right-down

        $net queue 0 1 0.5
        $net queue 1 0 0.5

        $net color 1 red
	# prune/graft packets
        $net color 30 purple
        $net color 31 bisque
	
	# RTCP reports
	$net color 32 green

        # chart utilization from 1 to 2 width 5sec
        # chart avgutilization from 1 to 2 width 5sec
}