The Sinn Féin president, Gerry Adams, has called on the two governments to deal with the outstanding parts of the Good Friday Agreement that still have to be implemented.
He made the comments at a rally for Irish Unity outside the GPO in the centre of Dublin, a day after saying that IRA decommissioning was imminent. Up to 4,000 people attended the rally.
Mr Adams said he hoped the two governments and others would give as much attention to removing all of the guns out of Irish politics, including those of loyalist paramilitaries and the British army, as they did to IRA guns.
He said Irish Republicanism stands on the threshold of the possibility of achieving a united Ireland.
Meanwhile, traffic diversions were in place in Dublin as a result of the march and rally.
The march, which took place ahead of the rally, travelled down O'Connell Street and D'Olier Street, headed anti-clockwise around Trinity College before heading over O'Connell Bridge and back onto O'Connell Street.