3.2.1 - Interface utilization question

Hi,

So I've been getting some odd alerts on interface utilization on some interfaces. For example, I have a trunk that is just a single 1Gbps Ethernet link, and the alert is telling me that I'm over on input utilization with a value of 4345028072.53. This calculates out to be 34,760,224,580.24 bps... 34 Gbps! This got me wondering how the heck Zenoss reads the IfInOctets value and figures out the delta between the current read and the previous read... unless it doesn't do that at all and just looks at the value of IfInOctets and does a calculation, which I think is incorrect since that's just a counter of the total octets in or out of an interface, right

Anyway, I'm obviously very confused and would love it if someone smarter than I out there could set the record straight for me.

Thanks,
Paul

References: "How To Calculate Bandwidth Utilization Using SNMP" http://www.cisco.com/c/en/us/support/docs/ip/simple-network-management-p...