Strange graph behavior

I have an historical chart showing utilization for two WAN circuits. One is 300 meg, the other is 100. These bandwidths are shown correctly on the Edit Properties for each interface. We have noticed that anytime the utilization maxes out, the graph line goes to baseline, i.e bottoms out.

Any ideas on the cause? Thanks.

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ken_cohen

any difference if you use another browser?

borgan

Happens with IE and Chrome.

ken_cohen

Would you be able to post a screenshot? Also, what is the device?

borgan

Its a Cisco ASR 1002 router.

ken_cohen

Not to sound like a jerk here, but are you sure that the graph isn't showing you reality? Can you log into the router while NPM is showing low transmit utilization and query the interface directly? A "show interface" should tell you if it's correct or not...

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