Australia A 312 for 9 dec (Smith 133, Sorensen 5-50) and 174 for 0 dec (Maddinson 113*) beat Ireland 186 for 4 dec (Stirling 115) and 207 (Poynter 63, Henriques 4-22) by 93 runs
After three competitive days, Ireland were overturned on the final day in Belfast as Moises Henriques' four wickets bowled Australia A to a 93-run victory.
The margin of victory threatened to be much wider as Ireland slipped to 112 for 7 chasing 301 to win but Stuart Poynter made 63 at No. 9 to give the scoreboard respectability, which Ireland had earned with a good account of themselves.
Poynter, in-form after 172 for MCC Young Cricketers earlier this month, played with a maturity and confidence which belied his 22 years. He struck nine boundaries in a 79-ball stay and, with his former Ireland Under-19 world cup colleague Stuart Thompson, made the Australians work for the final wickets.
Poynter and Thompson shared an eighth wicket stand of 70 in 17 overs before Thompson became the third of three wickets for offspinner Nathan Lyon when he was trapped lbw for 23.
Lyon had made the initial breakthrough on day four, after the morning session was lost to rain, having Andrew White well caught by Nic Maddinson at short leg off bat and pad.
James Shannon followed in identical fashion just eight runs later, and when Henriques removed John Mooney for a duck and Kevin O'Brien for 10 in quick succession, Ireland had lost four wickets for just 20 runs. But Poynter and Thompson ensured Ireland were not embarrassed.
They might have hoped to get closer to the target but their chase was hampered on the third evening when they slipped to 38 for 3. Shannon and White managed to take the total to 98 for 3 but the introduction of Lyon put paid to their hopes.
Lyon's potential rival for an Ashes spot, legspinner Fawad Ahmed, took his first wicket in Australian colours when Trent Johnston was lbw for 5 and the match was wrapped up when Poynter's cameo ended when he gave wicketkeeper Brad Haddin his fifth catch of the innings - Peter Siddle finally getting the reward that his display deserved.