Dublin's early dominance helped them brush Louth aside in Drogheda and qualify for the Bord na Mona O'Byrne Cup final.

Castleknock College, last year's runners-up, improved out of all recognition, as the game wore on, to put six tries past a valiant St Gerard's School in a 38-13 win in the quarter-final of the Leinster Schools Section C Junior Cup at Donnybrook.