The return fixture six days later at Stade Aime Giral will be refereed by Garner's English colleague JP Doyle who was most recently in charge of Munster's round 1 game against Edinburgh in Murrayfield.
Munster referees George Clancy, Peter Fitzgibbon and John Lacey are all in European action with Clancy and Fitzgibbon kicking off round 3 on Friday December 6th.
George is on duty for Cardiff Blues v Glasgow and Peter will take charge of Castre v Ospreys. John has been appointed to Leicester v Montpellier in round 3 and Toulon v Exeter in round 4.
Heineken Cup Round 3:
Munster v Perpignan, Thomond Park, Sunday December 8th, ko 12.45pm - Greg Garner
Heineken Cup Round 4:
Perpignan v Munster, Stade Aime Giral, Saturday December 14th, ko 4.40pm (3.40pm Irish) - JP Doyle