This object selects which traffic type's storm-control pass/drop counters should be reset when the clear operation is triggered. An admin sets this to target a specific traffic class -- such as broadcast or unknown unicast -- so that only the counters relevant to a particular troubleshooting session are cleared, leaving history for other traffic types intact. For example, an admin resetting drop counters after tuning the broadcast rate limit would set this to broadcast(1) before setting the clear-counters interface object.