Rain brought Australia's innings to a premature close in what was their first match at this level since beating New Zealand in the World Cup final in Melbourne in March.
There was, as yet no decision on the length of the Ireland innings, with an inspection due at 5:00pm local time (1600 GMT), but it promised to be an even contest after a superb comeback by the leading non-Test nation who were forced to go into the game without big-hitting Kevin O'Brien, because of a hamstring injury.
They put on 139 for the first wicket, with both batsman compiling half-centuries, but Ireland hit back with six wickets for 85 runs to give the home crowd plenty to shout about.
The first 10 overs powerplay, though, was dominated by Australia as they scored 80, which included nine fours and two sixes, with Craig Young receiving the harshest treatment, his third over going for 17, including three consecutive fours by Burns.
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Young thought he had the first wicket when Burns, on 61, edged to the wicketkeeper, but the television umpire ruled that it was a no-ball and the new cap's innings continued.
Only for another four overs, however, as Young got his man for the addition of just eight more runs, a mistimed pull going safely into the gloves of Niall O'Brien, getting his chance behind the wicket in place of Gary Wilson.
Ireland claimed the big scalp of Smith, caught behind for 21 and just before the rain arrived Mitchell Marsh found the hands of Murtagh at long-off.