[mrtg] Graph displays incorrect data drops

Nate List natelist at blastcomm.com
Wed Nov 15 21:50:44 MET 2006


Hello all, I have had this strange data showing up on my graphs where 
when the bandwidth is above a certain point, I start seeing a single 
read drop to 0 every hour or so.  I have attached a graph that clearly 
shows this, as well as the snip of the config which generates it.  It 
seems that this only shows up on devices that I am reading with SNMP 
V2.  SNMP V1 devices which I am reading do not seem to display this 
dropout.  I was monitoring the circuit at the time when MRTG Displayed 
the dropout, and there was no substantial change in the bandwidth.  I 
have upgraded to the most recent release of MRTG 2.14.7, but it did not 
change this effect.  Does anyone have any ideas of things to watch 
for/check which will help to diagnose the issue?
Thanks,
Nate Burke
Blast Communications

############################################
#Backhaul
############################################

Target[10.10.0.22_1]: 1:public at 10.10.0.22:::::2
SetEnv[10.10.0.22_1]: MRTG_INT_IP="10.10.0.22" MRTG_INT_DESCR="Motorola 
PowerQUICC FEC"
MaxBytes[10.10.0.22_1]: 2500000
Options[10.10.0.22_1]: unknaszero, bits
Title[10.10.0.22_1]: Traffic Analysis for Backhaul
PageTop[10.10.0.22_1]: <H1><A 
Href="http://10.10.0.22"target="_blank">Traffic for Backhaul</A></H1>
Directory[10.10.0.22_1]: 10.10.0.22\Bandwidth


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