This is for you networking geniuses out there.
We are building a series of identical machines. We are providing a managed switch for each machine and plan to use NAT to translate some private ip addresses to public. On the public side, each machine will be connected to an existing layer 3 switch provided by the customer. There will also be a computer running Wonderware historian and intouch with TopServer Ethernet driver communicating with each machine's PLC.
Network layout attached.
Yesterday I was reading A/B technote and found this statement regarding NAT limitations, “FactoryTalk® View Site Edition (SE) client/server communication may not operate correctly across a NAT boundary because it relies on protocols such as OPC and Domain Name System (DNS). Because of that, it is not recommended to have a distributed HMI network application with NAT between servers and clients. However, an HMI server on the outside network can access controller data from inside a NAT boundary and
service clients in the outside network.”
There was another limitation, "Microsoft® Distributed Component Object Model (DCOM), which is used in Open PlatformCommunication (OPC)"
I really don’t understand this and wonder if I’m going to have issues with my Wonderware and TopServer system? (TopServer is re-badged Kepware provided by my Wonderware distributor.)
We are building a series of identical machines. We are providing a managed switch for each machine and plan to use NAT to translate some private ip addresses to public. On the public side, each machine will be connected to an existing layer 3 switch provided by the customer. There will also be a computer running Wonderware historian and intouch with TopServer Ethernet driver communicating with each machine's PLC.
Network layout attached.
Yesterday I was reading A/B technote and found this statement regarding NAT limitations, “FactoryTalk® View Site Edition (SE) client/server communication may not operate correctly across a NAT boundary because it relies on protocols such as OPC and Domain Name System (DNS). Because of that, it is not recommended to have a distributed HMI network application with NAT between servers and clients. However, an HMI server on the outside network can access controller data from inside a NAT boundary and
service clients in the outside network.”
There was another limitation, "Microsoft® Distributed Component Object Model (DCOM), which is used in Open PlatformCommunication (OPC)"
I really don’t understand this and wonder if I’m going to have issues with my Wonderware and TopServer system? (TopServer is re-badged Kepware provided by my Wonderware distributor.)