Point-to-point and multi-cast are 100 meters over UTP cable. But if the connection via switches is applied, theoretically, there is no limit distance. It depends on the cables, media type is applied and switch level you use. Gigabit Ethernet switch with IGMP, VLAN support or higher level is recommended. If the switches support different media types, for example, 1000Base-X optic fiber also can be used to extend the wiring distance.