[mrtg] Re: Weird Graphs

[Koelstra, J. (Jan)]

Hakan,

To monitor 64 bit counters you need the following:
1. A snmp device that is capable of anwering SNMPv2 requests
2. The 64 bit rateup.exe
3. Tell snmp to use the SNMPv2 counters. To do so your target lines will
look like: Target[name]: <community>@x.x.x.x:::::2

HTH,

Jan.

-----Original Message-----
From: Hakan M. Durgut [mailto:hakandurgut at bnet.net.tr] 
Sent: Tuesday, December 31, 2002 2:06 PM
To: mrtg at list.ee.ethz.ch
Subject: [mrtg] Re: Weird Graphs


I did the upgrade, and I am using 64-bit rateup but I still get the same
thing.. 

Please see the image attached...

Can anybody use MRTG for high bandwidths ? I mean higer than 100 - 150
Mbps ? 


-----Original Message-----
From: Brander, Eric [mailto:Eric.Brander at ACS-INC.com] 
Sent: Thursday, December 19, 2002 3:06 PM
To: 'Hakan Durgut'; mrtg at list.ee.ethz.ch
Subject: RE: [mrtg] Weird Graphs

You are probably encountering false readings because of counter wrap. If
you are polling the 32-bit snmp counter on your device, the counter will
reset back to 0 multiple times in a 5 minute period at high bandwidth
utilization.  Try polling the 64-bit counter (if any... check your mib).
Also... I've had problems with MRTG properly dealing with numbers larger
than 32-bit in its calculations.  The latest version has a 64-bit rateup
that may solve those problems as well, but I understand its not quite a
stable release yet. /shrug

Eric

 -----Original Message-----
From: 	Hakan Durgut [mailto:hakandurgut at bnet.net.tr] 
Sent:	Thursday, December 19, 2002 5:23 AM
To:	mrtg at list.ee.ethz.ch
Subject:	[mrtg] Weird Graphs

Content-Type: text/plain;
	charset="us-ascii"
Content-Transfer-Encoding: 7bit

I am monitoring my Lucent CBX ATM Switch's STM4 ( OC12 ) physical port's
IN/OUT traffic via MRTG, 
 

 
the blue lines ( OUT ) sometimes decrease and increase back to the
normal traffic, 
 
with some other SNMP tools, I get the right values, for example in the
graph, in between 9 and 19:30 the traffic is really high, but I get
wrong values. 
 
Any Idea ? I guess my MRTG does it with the values higer than 110 Mbps,
my other example is my Total Border traffic ( upstreams + satelite +
peerings ) 
 
PS : I run mrtg-2.9.17 
 
Thanks. ,
Hakan
 
 



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