<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40">
<head>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=us-ascii">
<meta name=Generator content="Microsoft Word 11 (filtered medium)">
<!--[if !mso]>
<style>
v\:* {behavior:url(#default#VML);}
o\:* {behavior:url(#default#VML);}
w\:* {behavior:url(#default#VML);}
.shape {behavior:url(#default#VML);}
</style>
<![endif]-->
<title>Bericht</title>
<style>
<!--
/* Font Definitions */
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman";}
a:link, span.MsoHyperlink
{color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{color:purple;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:Arial;
color:windowtext;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:Arial;
color:navy;}
@page Section1
{size:8.5in 11.0in;
margin:1.0in 1.25in 1.0in 1.25in;}
div.Section1
{page:Section1;}
-->
</style>
</head>
<body lang=EN-US link=blue vlink=purple>
<div class=Section1>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>The 64-bit counter rollover is likely the
problem here. I’ve regenerated my config and we’ll see how it goes.
Thank you both Jan and Dan.<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'>Also, thanks for the ifref tip. This helps
me not with this problem, but with another problem I’ve got where my
router re-enumerates interfaces when it reboots. (I know this isn’t the
problem with my switch, as it hasn’t rebooted, and I already tried
regenerating the config, without it being fixed.)<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'><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>
<div>
<div class=MsoNormal align=center style='text-align:center'><font size=3
face="Times New Roman"><span style='font-size:12.0pt'>
<hr size=2 width="100%" align=center tabindex=-1>
</span></font></div>
<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> Koelstra, J.
(Jan) [mailto:JKoelstra@MINSZW.NL] <br>
<b><span style='font-weight:bold'>Sent:</span></b> Friday, March 21, 2008 11:31
AM<br>
<b><span style='font-weight:bold'>To:</span></b> Kettler, Matt;
mrtg@lists.oetiker.ch<br>
<b><span style='font-weight:bold'>Subject:</span></b> RE: [mrtg] cisco
switches, etherchannel,and artificially low graph values?</span></font><o:p></o:p></p>
</div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
style='font-size:10.0pt;color:blue'>Matt,</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
style='font-size:10.0pt;color:blue'>It looks like your config is not using
the 64bit counters but the 32bit counters. At about 114Mbits/s the 32bit
counters roll over once per 5 minutes. MRTG can deal with one roll over per
interval but there is no way to deal with multiple roll overs.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
style='font-size:10.0pt;color:blue'>Resent versions of MRTG detect the
availability of the ifHC* (i.e. 64bit) counters. In the older versions you
need to specify the usage of the 64bit counters in the cfgmaker command:
--snmp-options=:::::2</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
style='font-size:10.0pt;color:blue'>You can also manualy add the :::::2 at the
end of the targetlines in the mrtg cfg file to get the 64bit counters.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
style='font-size:10.0pt;color:blue'>An other possibility is that the ifIndex
for the specific port has changed, and now you are looking at an graph with
figures from an other port. This can easily happen after changes in
the configuration. </span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
style='font-size:10.0pt;color:blue'>To fix an interface to one graph
you can add '--ifref=name' or '--ifref=descr' in the cfgmaker command.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
style='font-size:10.0pt;color:blue'>HTH,</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 color=blue face="Times New Roman"><span
style='font-size:10.0pt;color:blue'>Jan.</span></font><o:p></o:p></p>
</div>
<blockquote style='margin-top:5.0pt;margin-right:0in;margin-bottom:5.0pt'>
<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'><o:p> </o:p></span></font></p>
</blockquote>
</div>
</body>
</html>
<table><tr><td bgcolor=#ffffff><font color=#000000><pre>_________________________________________________________
Dit bericht kan informatie bevatten die niet voor u is bestemd.
Indien u niet de geadresseerde bent of dit bericht abusievelijk aan u is toegezonden,
wordt u verzocht dat aan de afzender te melden en het bericht te verwijderen.
De staat aanvaardt geen aansprakelijkheid voor schade, van welke aard ook,
die verband houdt met risico's verbonden aan het elektronisch verzenden van berichten.
_________________________________________________________
This message may contain information that is not intended for you.
If you are not the addressee or if this message was sent to you by mistake,
you are requested to inform the sender and delete the message.
The state accepts no liability for damage of any kind resulting from the risks
inherent in the electronic transmission of messages.
_________________________________________________________</pre></font></td></tr></table>