Munster will renew their rivalry with Toulouse in next season's Champions Cup.
The two sides have been drawn to play each other in Pool B, while both will also face Northampton.
Toulouse won last season's quarter-final meeting between the teams on penalties.
Ulster, who are also in Pool B, are set to go up against defending champions La Rochelle and Sale.
Leinster will face Racing and Gloucester in Pool A.
In the Challenge Cup, Connacht have been drawn to play Brive and Newcastle.