The additional 3,400 troops are on high alert in what we call the “NATO Response Force”. That's a force that's available to NATO's Supreme Allied Commander Europe, the highest commander in NATO, to draw from when he activates new plans. No decision has been made on activating these plans. What you see now deploying into the NATO area of responsibility are additional troops that are voluntary contributions from the country.
To quickly answer the question, no additional troops have been deployed as part of those 3,400, and there's been no request from NATO at this point to dispatch any additional troops.