i'm on a mission to build a report where i hope to identify any mis-matched ports with interface speeds. (has anyone done this type of report?) i have not been successful and may be going about this wrong. or maybe we don't have any mis-matched ports out there and everything is ok out of thousands of ports.
for example i hope to identify a Gigabit Interface plugged into a 100 Mbps port, or a 100 Mbps interface plugged into 10 Mbps port .etc.
also as i started this report and i have noticed some negative values. can anyone explain these to me? thanks.

