[mrtg] Re: OID calculation

[Jerry Heidtke]

You need to find some OID which always returns the value 0. 

Then construct your target line like this (OID1 and OID2 are the things
you want to track. OID0 is the "dummy"):

Target[xyz]: OID1&OID0:public at someIP + ( OID0&OID2:public at someIP / 1024
)

Mind the spacing. Math operators need to be surrounded by white space.

Jerry



-----Original Message-----
From: Garth Williams [mailto:garth.williams at acrodex.com] 
Sent: Wednesday, July 30, 2003 11:11 AM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] OID calculation


Hi folx!
I have a situation I wonder if someone could help me with

Given the following:
Target[xyz]: OID1&OID2:public at someIP

An SNMP GET on OID1 gives me a value like so: 3463168
An SNMP GET on OID2 gives me a value like so: 2123456789

Anyone got any ideas how I can scale down OID2 so that the values would
be in the same scal (to something like 2073688 ish) so that they will be
close

I have tried ...

Target[xyz]: OID1:public at someIP&OID2:public at someIP /1024

...which I thought would divide OID2 by 1024, but "no worky pas".

Is it because the result (2073688.2705078125) has a decimal remainder
value?

Help (as always) appreciated!

Garth



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