LabVIEW Idea Exchange

About LabVIEW Idea Exchange

Have a LabVIEW Idea?

  1. Browse by label or search in the LabVIEW Idea Exchange to see if your idea has previously been submitted. If your idea exists be sure to vote for the idea by giving it kudos to indicate your approval!
  2. If your idea has not been submitted click Post New Idea to submit a product idea to the LabVIEW Idea Exchange. Be sure to submit a separate post for each idea.
  3. Watch as the community gives your idea kudos and adds their input.
  4. As NI R&D considers the idea, they will change the idea status.
  5. Give kudos to other ideas that you would like to see in a future version of LabVIEW!
Top Kudoed Authors
Showing results for 
Search instead for 
Did you mean: 

Ability to select interface for UDP writes

I would like to see the ability to select which network interface UDP writes are written to. Presently the UDP method in labview allows you to select interface for reads but writes automatically go out the "default interface" having a system consisting of a wired card, wireless card and a virtual interface is bringing about this need. I can manually turn off the virtual in the network control panel but there should be a way to just output to the device one wants to


I believe the UDP Write selects the network interface based on the routing table. In most cases this is enough to get it right but virtual interfaces in particular VMware have caused problems for me in the past. The issue is that Vmware directs all link-local (169.x.x.x) traffic to its virtual adapter by adding to the routing table.


I have never tracked down whether this behaviour by VMWare violates any standards or conventions but if it does not then any number of other applications could be doing this and we need more flexibility in UDP Write.

Active Participant
May be a duplicate idea. See:

Now is the right time to use %^<%Y-%m-%dT%H:%M:%S%3uZ>T
If you don't hate time zones, you're not a real programmer.

"You are what you don't automate"
Inplaceness is synonymous with insidiousness


interesting point here.  I decided to wire "net address" into the UDP open function and it DOES work for write as well.  I have a feeling maybe the function was updated but the help was not.  I have verified this functionality with wireshark

Proven Zealot

I have asked a tech writer to review the documentation for the function.

Active Participant
Status changed to: Declined
Tech writer was alerted of documentation issue.