-v in/out
-t [nas] tap0
--color=BACK#909090
--color=CANVAS#C5C5C5
DEF:in=/var/www/mrtg/rrd/nas.tap0.rrd:ds0:AVERAGE
DEF:out=/var/www/mrtg/rrd/nas.tap0.rrd:ds1:AVERAGE
CDEF:invout=out,-1,*
AREA:in#25679F#7E99B0:Down
AREA:invout#25679F#7E99B0:Up
LINE1:in#040404
LINE1:invout#040404
LINE1:0#000000