[mrtg] Graph Pitfalls

[jon.hartman at verizon.com]

I'm getting some errors that are really skewing my graphs. I'm measuring
the interface traffic on an alteon 180e and during the busier times of
day, I'm presented with the following:
 
Rateup WARNING: /usr/bin/rateup could not read the primary log file for
dfwaceres1_9
Rateup ERROR: /usr/bin/rateup found alteon1_9's log file was corrupt or
not in sorted order: time: 1060011000.
Rateup WARNING: /usr/bin/rateup The backup log file for alteon1_9 was
invalid as well
WARNING: rateup died from Signal 0 with Exit Value 1 when doing router
'alteon1_9' Signal was 0, Returncode was 1

What causes this sort of thing? Is it a question of the counters flipping
over, hence MRTG assuming the logfile is invalid? Here's a sample from the
log file:
 
1067287202 646758083 3036935658
1067287202 3577947 13147772 3577947 13147772
1067286902 3577947 13147772 3577947 13147772
1067286900 3578046 13147772 3592941 13147772
1067286600 3591516 13147772 3592941 13147772
1067286300 3400999 13148829 4469388 13200632
1067286000 4469388 13200632 4469388 13200632
1067285700 4459151 13200632 4469388 13200632
1067285400 2936727 13200632 3347950 13200632
1067285100 3345278 13200632 3347950 13200632
1067284800 2947211 13200632 2947211 13200632
1067284500 2947809 13200632 3036923 13200632
1067284200 3037810 13200632 3170010 13200632
1067283900 3169568 13200632 3170010 13200632

Thanks in advance,

Jon Hartman

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