Redundancy with three NIC

[amitgolhani]

Hello,

I am planning to use servers with three NIC to prepare WinCC OA redundancy solution. Out of three NIC two will be connected to device network using Ethernet switches and third NIC will be used to connect servers directly. Please let me know whether such configuration is supported by WinCC OA?

Best Regards,
Amit Golhani

[leoknipp]

Hello,

you can use a computer with 3 network devices in a redundant WinCC OA system.
For the connection between the servers you can use the direct connection and of the connections using ethernet switches.
To be able to start the system you have to ensure that one of the network devices used for the redundant connection between the servers refers to the real computer name.

For further details concerning the configuration of redundant network connections please have a look at the WinCC OA online help: Special functions --> Redundant network connections.

Best Regards
Leopold Knipp
Senior Support Specialist

[amitgolhani]

Hello,

Thanks for reply. since configuration with three NIC is not available in online help, I have created small configuration diagram for the same. Please have a look and let me know if configuration is correct.

Best Regards,
Amit Golhani https://www.winccoa.com/fileadmin/image ... 3_NIC.pptx

[leoknipp]

Hello,

you can only use two of them for the connection between redundant servers.
It is not possible to configure 1-n connections between redundant servers.

Best Regards
Leopold Knipp
Senior Support Specialist

[amitgolhani]

Hello Leo,

Please find attached refined architecture with three NIC. Here 2 NICs will be used to connect WinCC OA ( one direct and one shared connection) but this architecture will not provide redundant connection between WinCC OA server and UI Client. Please let me know your view on this.

Please let me know if I missed something.

Best Regards,
Amit Golhani https://www.winccoa.com/fileadmin/image ... 50316.pptx

[Gertjan van Schijndel]

For the clients you can use a different data and event config entries, so they can use other connections.

So the servers use the following config entries for example:

Code: Select all

data  = "server1_direct,server1_switch1$server2_direct,server2_switch1"
event = "server1_direct,server1_switch1$server2_direct,server2_switch1"

And the clients use the following config entries for example:

Code: Select all

data  = "server1_switch1,server1_switch2$server2_switch1,server2_switch2"
event = "server1_switch1,server1_switch2$server2_switch1,server2_switch2"

[amitgolhani]

Hello Gertjan,

Thanks for example. I will try this configuration and will let you know.

Best Regards,
Amit Golhani