After the immigration procedure you have to re-check in your luggage. Air New Zealand has a counter next to immigration exit in the Arrival Hall. If you fly by one of the other airlines (Qantas, Pacific Blue, etc.) you have to get your luggage to the Domestic Terminal and check it in there.
The Domestic Terminal is a 10 minute walk ? along a blue line - from the International Terminal. Only walk in good weather conditions as most sections of the footpath are open air.
Especially from spring to January it is very nice to walk because the walkway is like a pohutukawa alley, and with the trees in red flowers you get a great welcome feeling ;-)
If the weather is rubbish or you are tired you can use the free shuttle bus that runs every some minutes between the terminals from 6am to 10.30pm.

