I have a cellular router in the wild and it has a built in 4 port switch. Is there a way to monitor the amount of bandwidth that passes through one or all of these interfaces? I have an alert that this device used 50GB of data, but when I look at my graphs for the past one day, two days, one week, one month, I don’t see any obvious data spikes indicating that a particular day/days/weeks/etc had high, consistent usage.
In this case, I believe the ISP data is correct, but I’m not about to get the data out of librenms. I know that the graphs only monitor every 5 minutes, that should be fine for this request, it would take more than 5 minutes of use to hit 50GB in a 30 day billing cycle.