If you setup multiple ip addresses on one NIC card, do you also get multiple loopback memory sections??

[unclebump]

I have an application where I use the loopback address (127.0.0.1) to get data out of an opc server program. It is pushed up to the opc program by plc's on an ethernet network. If I assign multiple ip addresses to the same nic card, will I get multiple loopback memory sections?? Or is the loopback memory area only available once per computer?? I wanted to have each plc write to the same register addresses but on different ip address loopback memory section. Does anyone have experience with this type of application??

[AndreOliveira]

I believe the answer for your question depends on which OPC server you are using. I guess most of the OPC Servers are not designed to support such a functionality, however it is definetely something that is dependent on the OPC server you are using.

If you are using the Industrial Automation OPC Server CD provided by National Instruments, the answer will be no, the Drivers containned in this CD will not support what you want to implement, but again, you should check with the OPC Server Provider.

I hope it helps

Regards

Andre Oliveira