ISP Bandwidth Utilization

I would not recommend doing this type of metering on the F5 directly. Instead, I would use SNMP read monitoring into an external system like Solarwinds, Cacti, or whatever. There you could elegantly graph interface utilization.

The other way would be to use API connections to obtain stats and maybe using something like Python to write to a DB and perform computations with a graphing engine of some sort.