Are you looking for a report that takes the 30-day average availability from 2 interfaces and then subtracts InterfaceB from InterfaceA?
Or are you wanting to see the individual data points for the last month then run some math against them?
The first option would not be too hard, but will really only return something like this:
nodeid interfaceid device interface avg_availability availability_delta
----------- ----------- --------------------------- ------------------------------------------------------------- ----------------- ------------------
2 505 Router1 Intel(R) PRO/1000 MT Network Connection · Internal Network 100 0
19 245 Router2 Intel(R) PRO/1000 MT Network Connection · Classroom 100 0
Returning the delta doesn't really provide too much real data for most people. The VAST majority of your results will typically be 0 or 100, so the deltas would be the same.
However, I have seen several environments where they run a similar report, but exclude any availability = 100; which basically can give you a 'problem interfaces' report.
If you would like some further assistance creating the report, I think I have a basic one lying around somewhere. Just let me know.
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