Beckhoff CU2508 Documentation page 61

Fig. 82: Publisher settings - UDP/IP
UDP/IP settings - the addressing technique of the IP network layer with IP addresses is used. UDP is a
connection-less protocol without feedback.
• Broadcast: Sent to all device with destination IP (v4) 255.255.255.255
• Multicast: The destination IP must be specified, see notes on MAC multicast
• Unicast: Specify the target device (e.g.: 192.168.0.1), making sure that it can be reached through the
subnet mask
Use of broadcast and multicast
Network variables sent as broadcast or multicast at MAC or IP level can generate high network load
(depending on the cycle time), since they are multiplied into the whole connected network. This may
cause simple network devices such as printers to crash. With short cycle times all network traffic
may become blocked.
We strongly recommend using unicast addressing, taking into account variable identification, as de-
scribed above.
Real-time Ethernet port multiplier Version: 2.6
Commissioning
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