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

        mklink $net 0 2 5Mb 2ms right-down
        mklink $net 1 2 5Mb 2ms right-up
        mklink $net 2 3 1.5Mb 10ms right

        $net queue 2 3 0.5
        $net queue 3 2 0.5

        $net color 1 red
        $net color 2 white

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