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

[Larry Fahnoe]

Alex,

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
base?

--Larry

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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