cardosocea
Member
1) I've seen a lot of focus in here on multicast traffic. I've heard that's an issue on older EIP equipment, never run into any other scenarios where that's an issue. Possibly security cam type setups?
This depends on setup, but in my experience multicast traffic is the most flexible all around.
The setup I had most experience with was with several independent machines that needed to talk to each other. All machines required some data from each other, but not all.
By having each machine "publish" on a multicast its own data and read from the others it needed data from was quite a nice way to do it. There would be no need for setting up data for each destination as it all left from the same place.
The other great thing about it had to do with the SCADA driver, instead of the driver polling for the tags or DB's, it only had to listen in on the multicasts and always received all the required data from the machine. It was then a matter of whether to map it from the receive driver into the tag database on the SCADA system or not.