The rate-interval parameter specifies the time, in seconds, in which the change in value of a trap's variable (rate of change) is expressed.
If the rate-interval value is set for a trap, the samples of data obtained at the interval points (set using the interval parameter) for a trap variable are used to calculate the rate of change. If the calculated value exceeds the value set for the edge-1 or edge-2 parameter, the trap is fired.
For example, to obtain the number of CIFS operations per hour, you specify a rate-interval of 3600. If rate-interval is set to 0, no sampling at interval points occurs and trap evaluation proceeds as with any other kind of trap. The default value for the rate-interval parameter is 0.