This read-write object sets what the switch does with packets matching the DoS attack type in this table row: drop them outright, or mirror them to a monitoring port. Choosing mirror(2) lets an admin capture suspected attack traffic for analysis, but the mirror action only takes effect once a valid swDoSCtrlMirrorPort is configured; otherwise the switch behaves as if drop(1) were set. For example, an admin investigating repeated smurf-attack hits sets swDoSCtrlActionType to mirror(2) and then configures a mirror port so the flagged packets get copied to a capture port instead of being silently discarded.