[mrtg] Traffic Analysis graph Zeroing out

Volk,Gregory B greg.volk at edwardjones.com
Thu Apr 16 18:51:24 CEST 2015

Your attachment did not come through (or maybe my email system removed it).
Nonetheless, try increasing the MaxBytes[targetname]: value in the mrtg config file that corresponds to the link you're talking about and restarting the MRTG process.

So if your config target looks like this...

Target[myswitch_FastEthernet1]: \FastEthernet1:public at myswitch:::::2
SetEnv[myswitch_FastEthernet1]: MRTG_INT_IP="" MRTG_INT_DESCR="FastEthernet1"
Directory[myswitch_FastEthernet1]: myswitch
MaxBytes[myswitch_FastEthernet1]: 12500000              <==notice this line!!
Title[myswitch_FastEthernet1]: FastEthernet1 -- myswitch
PageTop[myswitch_FastEthernet1]: <h1>FastEthernet1 -- myswitch</h1>
                <div id="sysdetails">

...change the MaxBytes line to...

MaxBytes[myswitch_FastEthernet1]: 18750000

Note that MaxBytes is in bytes/sec, so 18750000 = 18.75 megabytes/sec = 150 megabits/sec.

From: mrtg [mailto:mrtg-bounces+greg.volk=edwardjones.com at lists.oetiker.ch] On Behalf Of John Shipley
Sent: Thursday, April 16, 2015 11:41 AM
To: mrtg at lists.oetiker.ch
Subject: [mrtg] Traffic Analysis graph Zeroing out

First off Greetings to all!  I have recently been placed in charge of the MRTG system we have and I have no experience with this.  In fact the only person on this team that did, retired recently.  I was brought into this group from another group, so I am kind of in a pickle.

With that little story here is what is happening.  We have graphs that track how much bandwidth a customer is using.  We have one customer who periodically uses a lot of bandwidth so we bumped their bandwidth up to 150MB from 100.  The issue is that the graphs were originally set to monitor up to 100MB.  When this customer goes over 100MB, the graph bottoms out to 0.  I attached the graph.  the area circled in red is where they went over 100.

I have spent days trying to figure out how to increase that graph's Y axis to 150 or 200M but I can't seem to figure it out.  Any suggestions would be very much appreciated.



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