From the GT6 manual:
Fixed Room Ownership (star type network model)
If room ownership is fixed, the race will be suspended if the current owner suffers connection problems or leaves the race. However, the fixed room ownership model means that a race can take place as long as there is a connection between each player and the room owner. Races are therefore less likely to be disrupted by individual players' network environments or network equipment. (Compatibility problems with network equipment such as routers will only occur between each player and the room owner.)
This is known as a star type network model. In this model, the player who created the room is the owner, and they host up to 15 other players. If your network's NAT type has been determined as 3, please play in rooms with fixed ownership.
In the star type network model, the room owner is required to have high network bandwidth. This means that not all players can become room owners. In the event of a player with low bandwidth becoming a room owner, cars may display signs of unnatural movement during online races.
I think this setup will suit hosts with NBN, like @stucar17.
Last edited: Sep 18, 2015