[mrtg] Re: How to monitor assymetric serial lines?

[John McKay]

i'm doing something very similar... i have two as5300's belonging to one
application (8 t1's), and i wanted to show the total modem calls for both in
one graph.  i'll send you the perl script.  all you will need to do is
change two mib values, and some simple math maybe. at least it is a start.
also will throw in another script that is retrieving input errors and crc
errors.

----- Original Message -----
From: Dan Wentzel <danw at bas.army.mil>
To: 'MRTG' <mrtg at list.ee.ethz.ch>
Sent: Monday, January 10, 2000 11:03 AM
Subject: [mrtg] How to monitor assymetric serial lines?


> Hello,
>
> We have a couple of assymetric serial lines that we monitor using
mrtg2.5.1.  The
> problem with assymetric lines is that the %utilization shown for
ifInOctets is wrong (Maxbytes
> is derived from the OUTPUT side of the interface).
> I have looked at the docs to find out how
> to do simple math on the targets, but the math is done to both ifInOctets
AND ifOutOctets.  That
> won't get me the correction factor I need for the INPUT side without
messing up the other side...
> I have read thru the docs that came with mrtg, looked at the contrib
directory and looked at what was
> offered on the mrtg web page, but I can't find either a way to do the
multiplication or a hack that
> will allow it (I'm not a perl guy...)
>
> Any suggestions short of graphing both sides independently?  Is there a
perl script out
> there that will do simple arithmetic to the column in the log file that
represents the input side?  Would
> that work?
>
> DJW
>
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