Re: SNMP - Interface statistics query + In/Out bits with Total Bandwidth graph type + traffic over 113something Mbps = graph rollover

Please read:
http://docs.cacti.net/faq#my_traffic_graphs_won_t_exceed_114_mbit_s

Paul

On 07-02-13 12:50, Lukasz Sokol wrote:
> Hi,
> using Cacti 0.8.7i;
> 
> the topic more or less summarizes what I am experiencing;
> 
> The SNMP query of Interface Statistics used came from the Generic SNMP-enabled Host
> Host Template.
> 
> Whether I select the In/Out Bits with Total Bandwidth as normal or with 64bit counters,
> it doesn't change what the graphs show: when the (5 min avg) throughput goes over 
> about 113 Mbps, the aforementioned 113Mbps is being substracted from the value returned
> and so the graph never shows more than 113Mbps.
> That wouldn't have bothered me much... before the link this is supposed to graph, got
> upgraded to 400Mbps (it was 185Mbps before, so it was clearly visible, where the rollover
> had happened...) Now it can rollover twice or thrice, it is itching...
> 
> What I tried to do, was to cause the graphs to not use rigid boundaries and 
> set Upper Limit to 1000000 (not using per-graph value) while still Auto-scale being on;
> (in graph templates);
> 
> Also made the data template for Interface-traffic data source, Maximum Value to 'U',
> both on traffic_in and traffic_out;
> 
> I don't know maybe there was some action required upon these changes?
> Still I accept that the historical data will not be amended that way, but the real question,
> is - how can I find out the values being graphed, starting from result of SNMP query, through
> data source, to what's fed into graph/rrdtool? To find the most likely culprit.
> 
> Could it be, that the queried device returns 32bit values and that is the real problem ?
> 
> Kind Regards,
> Lukasz
> 
> 
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