[mrtg] Different values on graph from MRTG & Cricket

Mir Hafeez Ali hafeezali at cyberia.net.sa
Wed Nov 7 06:19:35 CET 2007

Thanks for your reply.  

I have adjusted the polling time accordingly but still there is always the
difference.  I tried other software like CACTI and PRTG also.  PRTG displays
almost equal but CACTI doesn't.

More over I would like to get some help in regards to the history of the
traffic.  I mean the graph for month and year displays the average value of
max traffic.  With WithPeak option I can have the peak value for the month
and year.

With CACTI, I can get the value from specific date and time with in the
range but again I think its an average value that is calculated to display
the graph.

My question is "Is there a way to find out or display the traffic for a
particular day or week from the history or not?"

Thanks in advance and appreciate your efforts in answering the question.

Mir Hafeez Ali 

-----Original Message-----
From: Tobias Oetiker [mailto:tobi at oetiker.ch] 
Sent: Tuesday, November 06, 2007 7:52 PM
To: Mir Hafeez Ali
Cc: mrtg at lists.oetiker.ch
Subject: Re: [mrtg] Different values on graph from MRTG & Cricket

Hi Mir,

the 'problem' may be that you are not polling at exactly the same
time, so the peak traffic is not in exactly the same interval ...

example: cricket measures from 9:08am - 9:13am and
         mrtg measures from    9:06am - 9:11am


Today Mir Hafeez Ali wrote:

> Hi All,
> There is a difference in values of the traffic on either side of the link.
> While I am polling the graphs with MRTG, our ISP has Cricket.  I always
> a difference of around 2% of total traffic.
> For an example if I am seeing the peak value of 1996K from my graph
> on my router interface, the ISP graph shows around 2048K which is polling
> the interface on their side.
> Please if I can know why this behavior happening on the link.  Both ends
> having Cisco Routers and are connected through ATM link.  This is very
> important as we are always claiming our bandwidth not getting as committed
> by the ISP.
> Regards,
> ___________________________________
> Mir Hafeez Ali

Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten
http://it.oetiker.ch tobi at oetiker.ch ++41 62 213 9902

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