Are you using "Managed" or "Web Managed" switches?
Art-Net traffic is sent as broadcast packets by default. Many switches see that much broadcast traffic, interpret it as a malfunction in the network, and cut off the port. You'll have to go into the switch's configuration and turn off broadcast rate limiting. It can also be called Broadcast Storm control, or various other things depending on the particular switch.
Are you using "Managed" or "Web Managed" switches?
Art-Net traffic is sent as broadcast packets by default. Many switches see that much broadcast traffic, interpret it as a malfunction in the network, and cut off the port. You'll have to go into the switch's configuration and turn off broadcast rate limiting. It can also be called Broadcast Storm control, or various other things depending on the particular switch.
