Munster and Leinster have French opposition when the competition starts later this year.
Leinster will begin their Heineken Champions Cup campaign away to Racing next season.
The opening round is scheduled to take place over the second weekend in December.
Munster will welcome Toulouse to Thomond Park, in a repeat of last season's quarter-final tie.
And Ulster are set to travel to England to play Sale.
In the Challenge Cup, Connacht's first fixture is at home to Newcastle.
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