Leinster and Ulster squared off in a highly anticipated clash at the Aviva Stadium tonight.
First-time Leinster captain Ed Byrne scored the first try early on to mark the occasion and it was converted by Ross Byrne. Two Byrne penalties had Leinster 13-0 after just 20 minutes.
That was the half-time score after a frustrating opening period for Ulster.
They were much improved after the break and the next try came from Rob Herring, converted by John Cooney.
A Cooney penalty then made it 16-10 with 12 minutes left on the clock.
A killer blow arrived with just six minutes left as Leinster scored in the corner through Scott Penny, following a fine cross-field kick from Harry Byrne.
Ulster thought they had responded through a quickfire try from Cooney, but it was ruled for offside.
Another try from Byrne in the last minute sealed the win for Leinster on a 28-10 scoreline.
Leinster: Kearney; Keenan, O’Loughlin, Frawley, C Kelleher; R Byrne, Gibson Park; E Byrne, Cronin, Bent, Toner, Molony; Murphy, Connors, Deegan.
Replacements: Tracy, Milne, Clarkson, Ruddock, Penny, Osborne, H Byrne, O’Brien.
Ulster: Stockdale, Faddes, Hume, McCloskey, Lyttle; Madigan, Cooney; O’Sullivan, Herring, O’Toole, Carter, Treadwell; Rea, Murphy, Coetzee.
Replacements: Andrew, McCall, Moore, O’Connor, Timoney, Shanahan, Johnston, Ludik.