Tries either side of half-time from Rob Kearney and Jamie Heaslip set Leinster on their way to victory over Ulster in a fast-paced festive derby at the RDS.
Ulster fielded an under-strength team, with Grand Slam winners Paddy Wallace, Tom Court and Stephen Ferris rested as part of the IRFU Player Management Programme, while Willie Faloon replaced late cry-off David Pollock at openside flanker.
In a frenetic start, Ulster's debutant full-back Jamie Smith took two good early catches to settle his nerves and lock Dan Tuohy carried well for the visitors who were gunning for their first away win over Leinster in ten years.
The European champions however made it ten straight Magners League wins at their base, with the 15 -3 win moving them back to the top of the league table.
© Press Association