Is it possible to use a second network card for Labview

[Richard Kurvers]

I have a XP system with Labview 7.1 and 2 network cards.
One card is for connecting to our local network and WWW.
The other card I want to use is for communicate with a testtool.
I communicate with this testtool by means of UDP.
When I use the testtool through the local network card, it works fine.
But, when I use a second card for it, it refuses to communicate.
Can someone help me?

[unclebump]

You can also multi-home a network card. You can assign up to ten ip addresses to the same network card. I use this with modbus tcp connections to several modicon momentum plc's. I am not sure if it will work using different protocols at the same time.

[Bob_Y.]

When you say refuses to communicate, what do you mean? Can you ping through it? Can you telnet through it? If you can't, is it installed correctly and configured in the OS? Has a firewall (either SW or HW) blocked communication?

If you can communicate with other applications, just not LabVIEW, you might still check firewall settings. Other than that, I have not tried to use two network cards before, so I don't really know what all you need to change to make LabVIEW use the second.

[Dennis_Knutson]

It's the OS and not LabVIEW that decides which network card to use. The second NIC and the test equipment should be assigned to be on the same subnet and one different than your LAN. As Robert suggested, you should be able to ping the device once the IP's are correct.

[altenbach]

How is the second card configured?

Does it have its own IP on a seperate, unique private subnet shared with the testtool?

Go to a command prompt window and give us the output of the following two commands:

ipconfig /all
route print

Does only LabVIEW fail to communicate, or is the failure at the OS level? Can you ping the testtool?

Do you have any kind of personal firewall software installed?

[Richard Kurvers]

Thank you guys for your reaction on this.
The problem is solved.
It was,of course, not a Labview problem but a setting problem of my second card.