[mrtg-developers] Re: cfgmaker reports wrong Max Speed with SNMPv2 (2.10.15)

Larry Fahnoe fahnoe at FahnoeTech.com
Tue Nov 23 14:50:57 MET 2004


I pointed out what I was observing and where I thought the problem
was.  As I see it, when using SNMPv2 against a bunch of cisco routers
here, some interface speeds are being reported incorrectly by mrtg,
and yes, I consider this a bug.  I see that cfgmaker seeks to make a
bunch of decisions about what the correct values should be, and I see
that there is some attempt in the code to adjust to improper values.
My assertion is that it is not handling this particular case, and that
I do not see an obvious fix for the problem, thus my attempt to
document what I'm observing so that someone who is more familiar with
the code can offer either a fix or advice.

Given the number of cisco routers out there, what is your opinion of
the problem that I've reported?  Are my observations and judgment off


On Tue, Nov 23, 2004 at 10:00:19AM +0100, Alex van den Goaded wrote:
> On Mon, Nov 22, 2004 at 03:44:23PM -0600, Larry Fahnoe wrote:
> > Recently I started using SNMPv2 queries to talk to some of my routers
> > by passing --snmp-options=:::::2 to cfgmaker (2.10.15), and while this
> > works well for many interfaces, on some I'm getting speeds that are
> > too high.  It looks like cfgmaker is being too trusting of the value
> > it gets from ifHighSpeed.
> So to summarize:
> The device is reporting a wrong value and you blame cfgmaker ?
> Alex

Larry Fahnoe, Fahnoe Technology Consulting, fahnoe at FahnoeTech.com
952/925-0744      Minneapolis, Minnesota       www.FahnoeTech.com 

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