The Maritime Union says it wants to avert a waterfront lockout, after reaching a stalemate with Ports of Auckland over a new collective agreement.
The two parties will hold mediation meetings on Tuesday.
Last week, the port issued a notice stating a lockout on 3 December will last for almost 48-hours.
Chief executive Tony Gibson says the lockout is considered crucial to encouraging union members to withdraw the proposed strike and settle a new collective agreement.
Mr Gibson says the lockout will be cancelled if the strike notice is lifted.
Maritime Union president Garry Parsloe says it's a strange move by the port because the lockout will increase the stoppages from two days to four.
The proposed strike involves the complete withdrawal of Maritime Union members within the container handling, road and rail services at Waitamata seaport for two 24-hour periods.