[mrtg] Counter Wrap adding multiple interfaces

Steve Rogers steve.rogers at icl.net
Fri Jan 18 11:58:48 MET 2002

Using mrtg 2.9.17 with RRDTool to get in/out on 6 FastEthernet interfaces on
6 different cisco boxes.
The Target looks like this:

ifHCInOctets.1&ifHCOutOctets.1:community at 10.X.X.X:::::2 +
ifHCInOctets.1&ifHCOutOctets.1:community at 10.X.X.X:::::2 +
 #Fa4/0/1:community at 10.X.X.X + #Fa4/0/1:community at 10.X.X.X +
#Fa4/0/1:community at 10.X.X.X + #Fa4/0/1:community at 10.X.X.X

This is collected every 5 minutes and when the in octets rate hits around
115Mbps the graph drops to about 20Mbps. I thought that mrtg handles counter
wraps? Any ideas on why this should happen? Does mrtg handle counter wrap if
the target is an external script?


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