[mrtg] Problems with MRTG and Windows NT

[Leonardo Rodrigues]

    Dear Friends,

    I'm having a curious problem on monitoring my NT servers. Apparently
with no reasons ( no Dr. Watson errors, no MRTG errors, no Event Viewer
entries logged .. nothing ), mrtg seems to stop getting correct values from
some OIDs on Windows NT. As result, I get a flat line on my graphs. Note
that not all OIDs stop responding. Just some. Please take a look at:

http://burns.persogo.com.br/mrtg.html

Can you see the CPU usage is correct ? And can you see there are some wrong
flat line on my network traffic ? Yes, that's wrong. There was no backup,
and the server doesn't have a constant traffic such this. And even if it
happened, a constant traffic ( exactly the same, look at the .log file at
the end of this email ) is hardly difficult to get on a production server.

Have you ever experienced problems like these ?
The NT Server is: English NT4 with SP5
MRTG running on a RH6 box, mrtg 2.8.8, kernel 2.2.12 if it matters

The mrtg.cfg entry for the ethernet traffic is:

Target[homereth0]: 2:mycommunity at homer.mydomain.com
#10mbit/s network card - 1250000 mbytes/s
MaxBytes[homereth0]: 1250000
Directory[homereth0]: homer
Options[homereth0]: bits
LegendI[homereth0]: Bytes-IN:&nbsp
LegendO[homereth0]: Bytes-Out:&nbsp
Title[homereth0]: homer.mydomain.com - eth0 interface
PageTop[homereth0]: <H1>Network Traffic Analisys</H1>

My log file looks:

937522200 21897 13795 21897 13795
937521900 21897 13795 21897 13795
937521600 21897 13795 21897 13795
937521300 21897 13795 21897 13795
937521000 21897 13795 21897 13795
937520700 21897 13795 21897 13795
937520400 21897 13795 21897 13795
937520100 21897 13795 21897 13795
937519800 21897 13795 21897 13795
937519500 21897 13795 21897 13795
937519200 21897 13795 21897 13795
937518900 21897 13795 21897 13795
937518600 21897 13795 21897 13795
937518300 21897 13795 21897 13795
937518000 21897 13795 21897 13795
937517700 21897 13795 21897 13795
937517400 21897 13795 21897 13795
937517100 21897 13795 21897 13795


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