Grab a copy of cacti and add the templates for various BigIP modules (LTM and GTM).
The way of doing it is that SNMP provides the counters. You poll them and divide the difference between the counters in the two polls by the period of polling. That gives you the rate (diff/period). (Having SNMP provide the rate would be meaningly unless you knew exactly what the period it was using to calculate the rates was. And you'd then miss spikes unless you polled at 2x the update freq of the rate gauge.
I prefer cacti to AVR. AVR doesn't include enough detail for me, nor the resolution. And is specific to HTTP only.
H
Nimbostratus
