Leinster completed a 15-match regular-season winning streak with a 28-10 victory over Ulster in the Guinness Pro14 at the Aviva Stadium.
Captaining Leinster for the first time in a competitive game, Ed Byrne led by example with an early try and Ross Byrne kicked the other points for a 13-0 half-time lead.
The provinces were already assured of their semi-final places next week, and Ulster, who travel to Edinburgh in the last four, battled back with a Rob Herring maul try to make it 16-7.
John Cooney's 67th-minute penalty reduced the deficit further but Leinster, despite a fully-changed squad from last week's win over Munster, produced a clinical two-try finish as replacements Scott Penny and Harry Byrne both crossed late on.
Leinster have now 23 games on the spin.
The 'away' team were quickest out of the blocks, with man-of-the-match Ciaran Frawley managing to scramble onto his own grubber kick before prop Byrne, with solid support from Max Deegan and Will Connors, burrowed over for a second-minute converted score.
Costly penalties and turnovers hampered Ulster's progress, although a strong Jacob Stockdale run sparked some quicker ball. Yet entering the second quarter, Leinster were already 13 points up after fly-half Ross Byrne had landed two well-struck penalties.
A fine steal by Ross Molony foiled a five-metre line-out for Ulster, whose talismanic scrum-half John Cooney also endured a couple of frustrating errors.
Leinster were leaving the physical imprint with Connors driving Ian Madigan backwards and Josh Murphy's excellent maul defence thwarting a late Ulster attack.
Successive scrum penalties, either side of the interval, kept Leinster on course with Byrne opening the second half with three more points. Ulster could not profit from a Cooney break, set up by an otherwise well-marshalled Marcell Coetzee.
Things finally clicked for Ulster in the 53rd minute, a penalty kicked to the corner and a well-executed catch-and-drive saw hooker Herring power over for Cooney to convert.
Responding to injuries picked up by Stockdale and Jordi Murphy, Ulster's bench drove on their comeback bid with the fast ruck ball and improved angles of running leading to a Cooney three-pointer for 16-10.
Ross Byrne's younger brother Harry steered Leinster home, though, as they prepare for an Aviva semi-final date with either Munster or Scarlets.
The 21-year-old's inviting cross-field kick found open territory and the fresh-legged Penny finished well past Louis Ludik with 72 minutes gone.
Cooney did all the hard work in running in a terrific intercept try from 65 metres out - only to be caught offside at the ruck on the TMO revie.
And it was left to the younger Byrne to crash over from a few metres out in the 78th minute, adding the conversion himself for an 18-point winning margin.