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
