Editing Artist Help:Art-Net (section)

=== Connecting Interfaces ===

Connect all your interfaces to a Ethernet Switcher via CAT 5 cabling. You cannot daisy chain CAT 5 systems and each branch is limited to 100 metres. 

For longer runs use Fibre Optic cabling. This can be daisy chained and is often the preferred choice. Each run of fibre can be over 1 kilometre in length.

You also have to decide what network IP address range your interfaces will listen on. In general Artnet uses a subnet mask of 255.0.0.0 meaning that there is a huge range of available addresses. There are two common IP settings 2.x.x.x and 10.x.x.x. The first is preferred and is referred to as the primary IP address.