/usr/local/rrdtool-1.2.15/bin/rrdtool graph - \
--imgformat=PNG \
--start=-86400 \
--end=-300 \
--title="dumpbox - Smoke Ping" \
--base=1000 \
--height=120 \
--width=500 \
--alt-autoscale-max \
--lower-limit=0 \
--vertical-label="milliseconds" \
--slope-mode \
DEF:a="/home/www/cacti/rra/dumpbox_min_370.rrd":avg:AVERAGE \
DEF:b="/home/www/cacti/rra/dumpbox_min_370.rrd":min:AVERAGE \
DEF:c="/home/www/cacti/rra/dumpbox_min_370.rrd":loss:AVERAGE \
DEF:d="/home/www/cacti/rra/dumpbox_min_370.rrd":max:AVERAGE \
CDEF:cdefb=d,a,-,5,/ \
CDEF:cdefh=a,b,-,5,/ \
CDEF:cdefbc=c,0,GT,UNKN,a,IF \
CDEF:cdefbd=c,0,GT,b,UNKN,IF \
CDEF:cdefbe=c,40,GT,b,UNKN,IF \
CDEF:cdefbf=c,80,GT,INF,UNKN,IF \
CDEF:cdefbg=100,c,- \
CDEF:cdefcd=c,UN,INF,UNKN,IF \
AREA:a#FFFFFF:""  \
AREA:cdefb#333333:"":STACK \
AREA:cdefb#555555:"":STACK \
AREA:cdefb#888888:"":STACK \
AREA:cdefb#AAAAAA:"":STACK \
AREA:cdefb#CCCCCC:"":STACK \
AREA:b#FFFFFF:""  \
AREA:cdefh#CCCCCC:"":STACK \
AREA:cdefh#AAAAAA:"":STACK \
AREA:cdefh#888888:"":STACK \
AREA:cdefh#555555:"":STACK \
AREA:cdefh#333333:"":STACK \
LINE1:cdefbc#00CF00:"Up"  \
AREA:cdefbd#4123A1:"Packet loss 1..40 %"  \
AREA:cdefbe#8F005C:"Packet loss 41..80 %"  \
AREA:cdefbf#FF0000:"Down\n"  \
GPRINT:cdefbg:AVERAGE:"Success rate\:%8.2lf %%\n"  \
COMMENT:"Response time"  \
GPRINT:a:LAST:"Current\:%8.2lf ms"  \
GPRINT:c:LAST:"Loss\:%8.2lf %%\n"  \
GPRINT:b:MIN:"Minimum\:%8.2lf ms"  \
GPRINT:a:AVERAGE:"Average\:%8.2lf ms"  \
GPRINT:d:MAX:"Maximum\:%8.2lf ms\n"  \
AREA:cdefcd#C0C0C0:"" 

RRDTool Says:

OK