I was digging through some data for our network team today and discovered a couple of interesting anomalies where graphs did not render on the InterfaceDetails view for specific interface types. I took the time to parse through every interface type that we have recorded in our database and this is the summary of the issue. I've opened a case with support.
For the record we are running NPM 11.0 on Orion 2014.2.0.
1) InterfaceType 32 / InterfaceTypeName FrameRelay does not render when Errors and Discards (in their various states, hourly and daily) in the Interfaces table = 0. None of the other interface types exhibit the same behaviour.
2) Interface types 0, 1, 24, 28, 33, 53, 56 and 555 do not render a utilization graph when the InterfaceSpeed = 0. This is in spite of there being data in the Outbps, InBps, OutPps, InPps, etc. columns.
Has anyone else seen this sort of behaviour before?