[mrtg] Re: Problem with Nokia DSLAM RX and TX atm cells

[Jerry Heidtke]

If the numbers really are a gauge, not a counter, than your MaxBytes is way
too low. You have 32000, so mrtg will throw away any values above that, such
as the 870313 and 199079 that are the gauge values shown in the example logs
you provided. You need to set your MaxBytes much higher. By a rough
estimation, a 34Mbps link could carry as many as 72000000+ ATM cells in a 15
minute period.

(bandwidth in bits per second)/424 (bits per ATM cell)*900 (seconds in 15
minutes)

-----Original Message-----
From: Paul Littler [mailto:testsyd01 at iprimus.com.au]
Sent: Wednesday, September 11, 2002 10:36 PM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Problem with Nokia DSLAM RX and TX atm cells


Hello,

I am trying to monitor the ATM cells both incoming and outgoing on a 34m
link
between Nokia DSLAM nodes. My problem is the log only has values for the
last
epoc time MRTG was run. All other log values are zero. see the examples
below
of  the log file after MRTG has been run a few seconds apart on the config 
file:

First Run
1031801467 870313 199079
1031801467 0 0 0 0
1031799231 0 0 0 0
1031799000 0 0 0 0
1031798700 0 0 0 0
1031798400 0 0 0 0
1031798100 0 0 0 0

Second Run
1031801536 870313 199079
1031801536 0 0 0 0
1031801467 0 0 0 0
1031801400 0 0 0 0
1031801100 0 0 0 0
1031800800 0 0 0 0


The MIB OID is guage and only takes a reading every 15 minutes and is known
as Follows:
atmInterval15MinRxCellCnt: .1.3.6.1.4.1.1713.1.1.1.9.2.1.1.2.instance
atmInterval15MinTxCellCnt: .1.3.6.1.4.1.1713.1.1.1.9.2.1.1.3.instance



Following is a sample of my config file:

Target[172.20.20.159.cells]: 
1.3.6.1.4.1.1713.1.1.1.9.2.1.1.3.91.2&1.3.6.1.4.1.1713.1.1.1.9.2.1.1.2.91.2:
public at 172.20.20.159
MaxBytes[172.20.20.159.cells]: 32000
Title[172.20.20.159.cells]: sydmcs01nD50e Dalley trunk ATM Cell Count
YLegend[172.20.20.159.cells]: Dalley Trunk ATM Cell Count
LegendO[172.20.20.159.cells]: Dalley Trunk ATM Cells Transmitted:
LegendI[172.20.20.159.cells]: Dalley ATM Cells Received:
Options[172.20.20.159.cells]: Growright, Gauge, Integer
PageTop[172.20.20.159.cells]: <H1>sydmcs01nD50e Dalley Trunk ATM Cell 
Count</H1>
   <TABLE>
     <TR><TD>System:</TD>     <TD>sydmcs01nD50e</TD></TR>
     <TR><TD>Description:</TD><TD>Dalley Trunk ATM Cell Count </TD></TR>
   </TABLE>

Please note I have also tried inserting a dot (.) in front of the OID to no 
avail.
I have also used the following options  Growright, Absolute, Gauge, Integer.

An snmpwalk gets the following results:
root# snmpwalk 172.20.20.159 public .1.3.6.1.4.1.1713.1.1.1.9.2.1.1.2.91.2
enterprises.1713.1.1.1.9.2.1.1.2.91.2 = Gauge32: 326458
root# snmpwalk 172.20.20.159 public .1.3.6.1.4.1.1713.1.1.1.9.2.1.1.3.91.2
enterprises.1713.1.1.1.9.2.1.1.3.91.2 = Gauge32: 611012
root#

The format in the above config file works ok for graphing a Cisco router 
memory usage.

Can anyone help?

Thanks Paul

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