I need to monitor the traffic with a CAR (Committed Access Rate) applied to an interface in Cisco device.
I have the OID (18.104.22.168.22.214.171.124.126.96.36.199.1.2) of the counter of bytes permitted by this interface in the CAR, but the OID is a Counter, not the traffic in the interface.
When I used the mtrg, I can monitor the CAR because the mrtg do the formula
OID(t) - OID(t-5) = traffic in the period t-5 (5min).
I don't know if PRTG can do this.