What is a Link Aggregate Group (LAG) and does the NI Vision Acquisition Software Support it?

Updated Jun 7, 2018

Reported In


  • NI-IMAQdx

Issue Details

Does the IMAQdx driver support LAG or Dual GigE acquisition format?


There are several ways of combining multiple network connections. One such method is a Link Aggregate Group (LAG). This is sometimes used with GigE Vision cameras and can cause problems with the Vision Acquisition Software.

IMAQdx does not directly support GigE ethernet ports configured as a LAG. In some instances however the camera can still be used in dual GigE mode configured as LAG. Try the following steps:

  1. Make sure to use Intel high performance drivers
  2. Make sure the cameras work on the vendor's software (if available)
  3. Make sure Windows Firewall is disabled (or make sure it is not blocking data from the camera)
  4. Enable Jumbo Frames
  5. Lower the bandwidth and FPS from the camera
  6. If it works but looks like you are losing packets, check your connections

Additional Information

Link Aggregate Group is way of combing two network connections into one. This has several benefits including, but not limited to, increasing the maximum bandwidth and reliability. By having two connections that are interpreted as one the amount of bandwidth is doubled. Since there are two connections, there is built in redundancy because if one connection goes down there is still another available to transmit data.


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