[mrtg] Re: MRTG SNMPv2c configuration...

Nathan Lax nlax at cisco.com
Mon Nov 13 17:38:29 MET 2000

Hello all,

Thanks, Rainer,  for your prompt reply. I've tried what you suggested, and 
was pleased to learn that MRTG supports the 64 bit counters. However, I'm 
still having a couple of problems:

Here is the my configuration:

#----- begin config ----#

Workdir: (some dir)

Target[]: 18:public at
MaxBytes[]: 2100000000
Title[]: FRSW-1 (No hostname defined for IP address): POS5/0

#----- end config ----#

When I run mrtg with this config, I get the following error:

ott-devtest3:19> mrtg dpawsey.cfg
backoff (:2) must be a number >= 1.0 at SNMP_Session.pm line 117.

Can you help? Is there a newer version of mrtg that I need to install? (I 
am running 2.8.12) Also, what should I set the maxbytes parameter to? When 
I try to set maxbytes to a number that can handle 64 bit counters, I get an 
error message, saying 'Maxbytes must be smaller than maxint', which is a 32 
bit number.

Thanks very much for your help,

At 04:59 AM 11/13/00, you wrote:

>In article < at sword.cisco.com>,
>         nlax at cisco.com (Nathan Lax) writes:
> >
> > I am currently trying to configure MRTG to monitor some of the ifHC*
> > counters, and I found the following section of the MRTG Configuration
> > Reference. However, I can't make heads or tails of it.
> >        Target[ezwf]: 2:public at router1:::::2
> > Could you elaborate a little on this functionality? I have tried entering
> > the OID for the ifHC* mibs directly, but I get an error, as it seems the
> > SNMPGet function is SNMPv1 only. This passage leads me to believe SNMPv2c
> > is supported, however.
>The ":::::2" at the end of the target string selects SNMPv2c. You can
>use any 64bit counter (ifHC*) as long as you set this. If you use the
>target syntax given above (interface:community at host:::::2) it will
>monitor the variables ifHCInOctets and ifHCOutOctets.
>Rainer.Bawidamann at rz.uni-ulm.de
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