[AusNOG] Cacti Graphing @ 100MBit

[Joshua D'Alton]

munin specfically says:
>
>  IMPORTANT: On 32-bit systems the data source for this plugin uses 32-bit
> counters, which makes the plugin unreliable and unsuitable for most
> 100-Mb/s (or faster) interfaces, where traffic is expected to exceed 50
> Mb/s over a 5 minute period. This means that this plugin is unsuitable for
> most 32-bit production environments. To avoid this problem, use the ip_
> plugin instead. There should be no problems on 64-bit systems running
> 64-bit kernels.
>

obviously this is cacti, but i'd imagine that the plugins aren't different
in how they measure, and therefore this problem.

just thought i'd throw that in for posterity and google searching :)


On Sun, Nov 17, 2013 at 1:41 PM, matz <matzarah at asiade.net> wrote:

>  It depends on the polling interval.  A 32 bit counter can record a
> maximum of 4,294,967,295 bytes of data transferred on an interface.  At a
> 5 minute polling interval, this is 114 Mbps (4,294 MB * 8 / 300 sec), 1
> minute polling interval this is 572Mbps (4,294 MB * 8 / 60 seconds) before
> it starts to break.
>
> On 16/11/2013 9:30 PM, PRK wrote:
>
> As a slight digression, I've usually seen a 32 bit counter break between
> 200 & 300Mbit (IIRC), not at the 100Mbit boundary you're describing.
>
> prk.
>
>
> On 2013-11-16 21:11, Alex Maclaren wrote:
>
> Hi Daniel,
> We had a problem where cacti couldn't graph speeds of over 100mbit in
> graphs.
> We found you have to set the data query data type to the 64-bit counter
> type when creating the graph.
> Hope this helps.
>
> Regards,
>  Alex Maclaren
>
> On 16/11/2013 7:17 PM, Greg Cockburn wrote:
>
> Hi Daniel,
>
> You might find it is snmpd on the host if it is Linux.
>
> The SNMP daemon doesn't have permissions to get the speed of the interface
> and so defaults to 1000Mbit.
>
> If you add:
> interface eth0 6 1000000000
>
> to your snmpd.local.conf file, this will fix the problem.
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/250549
>
> Of course maybe I am barking up the wrong tree, but this has been a
> problem for me in the past.
>
> Good luck.
> Greg.
>
>
>
> On Fri, Nov 15, 2013 at 11:43 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
>>
>> _______________________________________________
>> AusNOG mailing list
>> AusNOG at lists.ausnog.net
>> http://lists.ausnog.net/mailman/listinfo/ausnog
>>
>>
>
> _______________________________________________
> AusNOG mailing listAusNOG at lists.ausnog.nethttp://lists.ausnog.net/mailman/listinfo/ausnog
>
>
>
> _______________________________________________
> AusNOG mailing listAusNOG at lists.ausnog.nethttp://lists.ausnog.net/mailman/listinfo/ausnog
>
>
>
> _______________________________________________
> AusNOG mailing listAusNOG at lists.ausnog.nethttp://lists.ausnog.net/mailman/listinfo/ausnog
>
>
>
> _______________________________________________
> AusNOG mailing list
> AusNOG at lists.ausnog.net
> http://lists.ausnog.net/mailman/listinfo/ausnog
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ausnog.net/pipermail/ausnog/attachments/20131117/26a284d2/attachment.html>