rrdtool graph graph.png --title="Test Graph" --height=400 --width=800 --vertical-label="Bits per second" \
DEF:pkt=datafile.rrd:packets:AVERAGE \
LINE1:pkt#ff0000:Packets
rrdtool graph graph.png --title="Test Graph" --height=400 --width=800 --vertical-label="Bits per second" \
DEF:pkt=datafile.rrd:packets:AVERAGE \
AREA:pkt#ff0000:Packets
rrdtool graph graph.png --title="Test Graph" --height=400 --width=800 --vertical-label="Bits per second" \
DEF:pkt=datafile.rrd:packets:AVERAGE \
LINE1:pkt#ff0000:Packets \
STACK:pkt#0000ff:Packets
AREA:x1#FF0000:x1
STACK:x2#0000FF:x2
LINE2:x1#FF0000:x1
STACK:x2#0000FF:x2+x1
LINE2:x1#FF0000:x1
AREA:x2#0000FF:x2:STACK