Odd real time graph behavior
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
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
observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
This is normal some platforms limit counter updating once per 15sec
On 22 авг. 2014 г., at 1:30, Derek dandenoth@gmail.com 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 <realtimegraph.jpg> _______________________________________________ observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
Huh well thanks guys. Is there anyway of doing an override on that or is it set in stone? On Aug 21, 2014 5:20 PM, "Nikolay Shopik" shopik@inblock.ru wrote:
This is normal some platforms limit counter updating once per 15sec
On 22 авг. 2014 г., at 1:30, Derek dandenoth@gmail.com 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 <realtimegraph.jpg> _______________________________________________ observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
Usually this is hardcoded on most platform
On 22 авг. 2014 г., at 2:29, Derek dandenoth@gmail.com wrote:
Huh well thanks guys. Is there anyway of doing an override on that or is it set in stone?
On Aug 21, 2014 5:20 PM, "Nikolay Shopik" shopik@inblock.ru wrote: This is normal some platforms limit counter updating once per 15sec
On 22 авг. 2014 г., at 1:30, Derek dandenoth@gmail.com 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 <realtimegraph.jpg> _______________________________________________ observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
observium mailing list observium@observium.org http://postman.memetic.org/cgi-bin/mailman/listinfo/observium
participants (3)
-
Derek -
Nikolay Shopik -
Tom Laermans