Re : Setting up Link Aggregation for NI-IMAQdx

[pfigliozzi]

I have a GigE camera that has two ethernet inputs and I would like to use both of them to send image data to my computer. I wish to aggregate (or team) two of the ethernet ports on my computer so that I can get twice the bandwidth between my camera and my computer. I have an Intel PRO /1000 PT Dual Port Server Adapter installed in the PCI slot of my computer. With the Intel drivers that came with the card, I am able to combine the two ports on ethernet controller but this makes it so the camera doesn't work in MAX. If I install the NI GigE Vision Drivers for my ethernet controller I can get it to work in MAX but I cannot get the maximum performance from it because I cannot aggregate the two ports. Does anyone know how to do port aggregation using the NI GigE Vision Network Drivers?

[toto26]

Maybe you can try to follow the procedure descibed in the manual from SVS Vistek HR cameras wich are dual port.

You will find it on their website: http://www.svs-vistek.com/_products/cameras/svcam/hr/hr.php. Then donwload the pdf Manual_SVCam_HR_GE.pdf and go to page 86.

Hope this helps

Regards

[BlueCheese]

Currently the High Performance GigE Vision drivers do not have the internal ability to support link aggregation. This is something that may come in a future version. However, because link aggregation is basicially transparent to the network stack, IMAQdx natively does support link aggregation if you use Intel's drivers instead. You should be able to diagnose why your cameras weren't working with Intel's drivers. Generally it is due to using jumbo frames when they are not enabled (>1500 byte packets) or having the Windows firewall enabled. Both of these issues are transparently handled automatically if you are using the NI drivers, but must be manually configured when using another vendor's drivers.

Eric

[pfigliozzi]

So it turns out Windows Firewall was the issue. The camera now shows video in MAX at the camera's maximum framerate (63fps) but there are horizontal black lines appearing across the image. Under Ethernet Attributes it is dropping packets. The camera is an AVT Prosilica GX1910 and it is strange because it works fine with the GigE Sample Viewer provided by AVT but it has this packet loss issue in MAX. I have read elsewhere that not having Jumbo Frames enabled could affect this but each of my teamed network ports are set to 9014 bytes for Jumbo Frames. Any other suggestions to fix this problem? Thanks for the help.

[Chartreuse]

Hi,

I am having exactly the same problem with my AVT camera : I am using the Intel PRO/1000 PT Dual Port card with aggregate ports, and there are lots of missing packets with MAX and LabView. Everything works fine with the AVT software and jumbo frame is also set to 9kB. Has anybody managed to get LabView to work properly with the Intel driver?

Thanks for your help!

[toto26]

Hello,

I would say, check your cables, because it's often a cause of bad transmission. Be sure to use Cat5E cables at least.

Try to see the inter packet delay also.

Regards