The backoff-step parameter specifies the number of seconds by which the trap evaluation interval is increased.
If a trap interval is 10 and its backoff-step is 3590, the trap is evaluated every 10 seconds until it fires the first time and sends data, and once an hour thereafter. The default value for the backoff-step parameter is 0.
The backoff step parameter is not displayed in FilerView during trap creation unless "step" is selected in the Backoff Style field.