Ranfurly Shield holders North Harbour were dumped out of the Air New Zealand Cup quarter-finals, just a week after being humiliated by Waikato.
On Sunday Otago set up a semi-final against Waikato in Hamilton with a crushing 56-21 win against Harbour. The fact that Otago won away from home will give them confidence that victory in Hamilton is possible.
The visitors scored seven tries to three and led 36-0 at halftime.
North Harbour: Rudi Wulf, Rua Tipoki, Anthony Tuyitavake tries; Tusi Pisi 3 con.
Otago: Toby Morland, Karne Hesketh, Adam Thomson, Callum Bruce, Matt Saunders, Craig Clare, James Ryan tries; Nick Evans pen 4 con, Callum Bruce 2 pen, 2 con.