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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Almost certainly counter rollover. Make sure
you are using SNMPv2 (add :::::2 to the end of the Target definition) to use
the HC counters, else you’ll get it dropped in chunks of ~140Mb, which would
tally with what you’re seeing.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>In the time of a 5-min poll, 32-bit
counters will roll over if network throughput is over about 140Mbps. Therefore
you need to use 64bit counters if your link is >100Mbps. 64 bit counters
are only available using SNMPv2 or higher.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Steve<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span lang=EN-US
style='font-size:10.0pt;font-family:Tahoma;font-weight:bold'>From:</span></font></b><font
size=2 face=Tahoma><span lang=EN-US style='font-size:10.0pt;font-family:Tahoma'>
mrtg-bounces@lists.oetiker.ch [mailto:mrtg-bounces@lists.oetiker.ch] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Doug Lessans<br>
<b><span style='font-weight:bold'>Sent:</span></b> Tuesday, 19 August 2008
07:23<br>
<b><span style='font-weight:bold'>To:</span></b> mrtg@lists.oetiker.ch<br>
<b><span style='font-weight:bold'>Subject:</span></b> [mrtg] gigabit links not
graphing properly</span></font><font size=3 face="Times New Roman"><span
lang=EN-US style='font-size:12.0pt;font-family:"Times New Roman"'><o:p></o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Calibri><span style='font-size:11.0pt'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 face=Calibri><span lang=EN-US style='font-size:
11.0pt'>Gigabit link on Cisco 6506 switch does not indicate correct
bandwidth utilization. I “show interface” for the interface
and see ~400 mb/s, but the graph indicates ~90mb/s. Any help would
be appreciated. Thank you. Doug<o:p></o:p></span></font></p>
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