bayern 5-0 up at half-time as robert lewandowski -lrb- 2 -rrb- , thomas muller , thiago alcantara and jerome boateng scored .
former liverpool and real madrid midfielder xabi alonso scored bayern 's sixth in the closing stages .
porto had gone in to the match with a 3-1 lead from last week 's first leg in portugal .
colombia international jackson martinez scored a consolation for porto with seventeen minutes to go .
porto 's spanish defender ivan marcano was dismissed in the 86th minute after picking up two bookings .