The Senegalese forward worked with the Rangers managerial target at Panathinaikos.
HITC Sport understands Canaries want Senegalese forward.
The Ecuadorian international is a target for the Turkish side, with the former Sunderland and Hull star potentially on his way in exchange.
Sunderland are reportedly keen on Sion striker Moussa Konate.
Jermaine Jenas has had his say on Sunderland's fight against relegation.
Sunderland could look to sign Dame N’Doye on a permanent deal.
Sunderland's new signing Dame N'Doye was left on the bench against Bournemouth.
The pair are expected to fire Sunderland to safety.
N'Doye could make his Sunderland debut against Bournemouth this weekend.
The striker recently joined Sunderland from Trabzonspor.