What exactly is the Ethernet Unit (IP ID)?

A Crestron IP ID is a unique identification number for devices in a Crestron IP-based network. Each device on the network (e.g. touch panel, display, projectors) is assigned its own IP ID, which is used to uniquely identify it on the network and connect it to other devices and the control software.
The Crestron IP ID is an important part of the Crestron network design and allows to manage, configure and control devices connected to a Crestron system.