Unet Local Lan - auto create and join

If i want to auto create a LAN network when a scene loads, what would be the best way to go about that? Any keywords/link for that?

If a LAN doesnt exist on localhost:80, a LAN will auto create by one of the clients when the scene loads. Also if the host drops, a client auto creates a LAN and the clients are reconnected via network migration manager.

Basically looking for resources or examples to research this for implementation

Look up the NetworkDiscovery examples provided by the Unity team.