This is simply your device not updating those counters. Which means they freeze for 5 seconds, which to Observium means there's no traffic.
For example, net-snmp only does it every 15 seconds.
Tom
On 21/08/2014 23:30, Derek wrote:
I'm getting some strange looking graphs on some ports on my routers, where the graph is basically just a bunch of spikes. Set at 1 second intervals, it will register traffic for one tick, then nothing for anywhere from 4-10 ticks, then register traffic again, and so on. This is happening on Cisco 2811's, 2911's, and a 7206VXR, and it happens on the FastEthernet, GigEthernet, and SVI ports on them. If I set the interval to 5 seconds or higher, it looks normal again. Now, these same routers with this problem have no issue doing a 1 second interval on their Serial ports or sub-interfaces. We have several 2960 switches that seem to work just fine.
I've attached an example graph to show you what I see. I happen to know that this port had at least a consistent 1MB connection throughout the time period of the graph.
Thanks,
Derek
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