The game finished in a 1-1 draw with subsititute Richie Byrne scoring for the Republic in the 65th minute before Scotland equalised through Stephen Howard in the 83rd minute.
Pat Devlin's side had Scunthorpe's Jim Goodwin sent off.
Former City Academy and Reserve team keeper Jonny Tuffey was in goal for Northern Ireland U21's in a 3-0 win against Moldova at Glenavon.