Why is my PXIe-7903 Unable to Receive Data from Connected PCs Using the 100 GbE Example?

Updated Nov 4, 2025

Issue Details

When I'm running the PXIe-7903 100 GbE example and using the 7903 for receiving data, it doesn't seem to receive anything from my networked transmitting PC.  If I use a packet sniffing program, I'm able to see an ARP request from the transmitting PC to the 7903, but there is no response from the PXIe card.  What is the issue and how can I resolve it?

Solution

This is a known issue with the PXIe-7903 100 GbE example.  It does not respond to ARP requests sent to it by connected systems.  Generally, this manifests as data not being received as expected.

In order to correct this, manually configure the ARP table of the system connected to the 7903.  On Windows, this can be done with the following command:

arp -s <PXIe-7903 IP> <PXIe-7903 MAC> <IP of sending NIC>

Additional Information

This is published on the FlexRIO Known Issues page, which can be found at the link below.

Related Links

https://www.ni.com/en/support/documentation/bugs/25/flexrio-2025-q4-known-issues.html

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