[AusNOG] Cacti Graphing @ 100MBit

[Dave Lindon]

Hi Daniel,
Without knowing specifics i'd check the following:

The most likely culprit is 32bit counters:
http://forums.cacti.net/viewtopic.php?f=6&t=24526

Whenever a traffic graph is created cacti polls the ifSpeed from IF-MIB, if
you create a graph when a link is operating at 100Mb or down you may need
to perform an rrdtune for the database to accept the input, the command
will look like this "rrdtool tune host_traffic_in_33.rrd --maximum
traffic_in:1000000000000" (http://oss.oetiker.ch/rrdtool/doc/rrdtune.en.html
)

Also if the servers you are polling are windows based, there may be a few
issues with 64 bit counters.

Dave



On Fri, Nov 15, 2013 at 11:13 PM, Daniel Watson <daniel at glovine.com.au>wrote:

> Hey Noggers
>
> We use cacti for our bandwidth monitoring
>
> Recently I have noticed that none of my servers graphs are showing the
> transit peaking over 100mbit which is untrue as all servers are on 1GBit
> ports, I have verified this numerous times, but yet cacti won't graph above
> 100mbit
>
> Can somebody please tell me how I can fix cacti to graph up to 1gbit?
>
> Appreciate the assistance in advance
>
> D.
>
> Sent from my iPad
>
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