A controller generates a signal to control network activity-indicator devices based upon activity-level information provided by the central processing unit of a network component. This shifts the significant burden of controlling the indicator device from the central processing unit to the controller. The activity indicator-flashing pattern may change non-linearly relative to changes in the activity level to improve the quality of the information provided to network administrators. In addition, the flashing may also be randomized to provide a perception of actual network traffic patterns, and to reduce any appearance of correlated or synchronized flashing when multiple activity indicators are displayed.