[mrtg] Re: Reboot problems

Neil Calvert ncalvert at cabletron.com
Mon Feb 28 18:27:40 MET 2000

You're right, counters get reset when the box is rebooted.

It depends what you're after - total number of octets/packets that have
passed through an interface, or the rate of passing. Total number of
packets passed isn't often useful unless you're actually billing someone
on that basis rather than the bandwidth they're using.

To answer simply : MRTG graphs the rate rather than the total number -
you will see a dropped rate for a couple polls then it should settle
down. That's been my experience.


-----Original Message-----
From: Tony Nelson <tnelson at techie.com>
To: mrtg at list.ee.ethz.ch <mrtg at list.ee.ethz.ch>
Date: Monday, February 28, 2000 12:18 PM
Subject: [mrtg] Reboot problems

>Hi All,
>  I'm still relatively new to mrtg, but I seem to have a nice system
>  I ran into a problem this weekend when we did our normal system
>that involved monitoring a Sun Solaris 2.7 ethernet card.
>from my config file:
>Target[mail.tisny.com]: 2:public at mail.tisny.com
>MaxBytes[mail.tisny.com]: 1200
>Title[mail.tisny.com]: mail (mail.tisny.com): hme0
>Options[mail.tisny.com]: growright
>PageTop[mail.tisny.com]: <H1>Traffic Analysis for hme0
> </H1>
>   <TR><TD>System:</TD><TD>mail in System administrators
>   <TR><TD>Maintainer:</TD><TD>System administrator</TD></TR>
>   <TR><TD>Interface:</TD><TD>hme0 (2)</TD></TR>
>   <TR><TD>IP:</TD><TD>mail.tisny.com (</TD></TR>
>   <TR><TD>Max Speed:</TD>
>       <TD>1200.0 Bytes/s (Other)</TD></TR>
>  </TABLE>
>Basically, the problem is quite simple, when we rebooted the box, it
>started responding to mrtg's SNMP requests w/ ifInOctet and ifOutOctet
>values that were less than the 'last' value stored in the log file.
>assuming these values were reset to 0 during the reboot.
>Does anyone have a good strategy for dealing w/ this?   Am I just
>an option?  Any help would be greatly appreciated.
>Thanks in advance,
>Tony Nelson
>Tony Nelson        www.gnupg.org keyid 136C5B87
> - Standard Disclaimers Apply -
>     Boycott Amazon!  -  http://www.gnu.org/philosophy/amazon.html
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