You are using Collectd 4, which is deprecated by CGP. Graphs like df and interfaces may be incomplete.
ALEP-eV-siemensstr

olsrd

"-l" "0" "-w" "800" "-h" "350" "-t" "olsrd signal_quality (topology)" "-s" "e-86400" "DEF:min_a3432f79_raw=rrd.php?path=ALEP-eV-siemensstr%2Folsrd-topology%2Fsignal_quality-average.rrd:value:MIN" "DEF:avg_a3432f79_raw=rrd.php?path=ALEP-eV-siemensstr%2Folsrd-topology%2Fsignal_quality-average.rrd:value:AVERAGE" "DEF:max_a3432f79_raw=rrd.php?path=ALEP-eV-siemensstr%2Folsrd-topology%2Fsignal_quality-average.rrd:value:MAX" "CDEF:min_a3432f79=min_a3432f79_raw,1,*" "CDEF:avg_a3432f79=avg_a3432f79_raw,1,*" "CDEF:max_a3432f79=max_a3432f79_raw,1,*" "LINE1:avg_a3432f79#ff0000:average" "GPRINT:min_a3432f79:MIN:%5.1lf%s Min," "GPRINT:avg_a3432f79:AVERAGE:%5.1lf%s Avg," "GPRINT:max_a3432f79:MAX:%5.1lf%s Max," "GPRINT:avg_a3432f79:LAST:%5.1lf%s Last\l"