Problem with RRD Graph!

[jason-duff]

hallo people, i have a problem.
i use the RRD-tool for Networkanalysis.
I measure the traffic of the Interface etho.
then i graph it with the rrdtool graph funktion.
then i calculate the maximum traffic within the timespan.
I have a 2Mbs Interface.
Now i will calculate the percentage of the maximum traffic to this 2Mbps.
Example: my maximum traffic rate is 1Mbps .this is 50% of 2Mbps.
In sourcecode i try to do this with the VDEF:

Code: Select all

RRDs::graph("/space/mrtg/test/load.png",
     "--vertical-label= traffic in bps",
     "--title=Network Interface $Interface",
     "--width=600",
     "--height=200", 
     "--start=$begin",
     "--end= $end",
     "DEF:eth0r=$DB:ds1:MAX",
     "CDEF:eth0rb=eth0r,8,*",
     "CDEF:eth0tb=eth0t,8,*",
     "VDEF:ethomax=100,2000000,/eth0r,MAXIMUM,*",
     'HRULE:2000000#FF0000:100% bandwidth (2 Mbps)\n',
     'COMMENT:                  Average              Maximum          Current\n',
     "AREA:eth0rb#778899:Receive ",
     'GPRINT:eth0rb:AVERAGE:%12.2lf %sbps',
     'GPRINT:eth0rb:MAX:%12.2lf %sbps',
     'GPRINT:eth0rb:LAST:%12.2lf %sbps\n',) or
         die "graph failed ($RRDs::error)"

but it doesnt work. I make something wrong in the VDEF definition.
an idea????

thanks

[TheWitness]

Is the forward slash in front of the def name correct:

,/eth0r

TheWitness