As of CBP 2.4:

For UDP (no AC31 header) configuration add a new object under ETHERNET Interface -> Protocols. In the device tree double-click the new added item to open the configuration:

The following parameters are available:

Parameter	Default	Value	Meaning
Port	0	0…65535	Port that is used for the UDP connection. See note below for further information.
Size of receive buffer	4096	1464…65535	Size of the receive buffer in [Bytes]. The behaviour in case of a full buffer can be determined with parameter Behaviour on receive buffer overflow.
Size of transmit buffer	4096	0…65535	Size of the transmit buffer in [Bytes].
Receive broadcast	Disable	Disable	Reception of broadcast packages is disabled.
		Enable	Reception of broadcast packages is enabled. Broadcast packages will not be ignored by the controller.
Behaviour on receive buffer overflow	Overwrite	Overwrite	Incoming packages will overwrite the oldest packages in case of a full receive buffer.
		Reject	Incoming packages will be rejected in case of a full receive buffer.

Note

The following ports are reserved and will cause a configuration error if selected: 1200, 1201, 123, 80, 24576, 25383.