Hi lscom,
Please update the firmware and driver of the XL710 Card. You may download the firmware and driver below:
1. Intel Ethernet Drivers and Utilities - Browse /i40e stable/1.3.39.1 at SourceForge.net
2. Download NVM Update Utility for Intel® Ethernet Converged Network Adapter XL710 & X710 Series
Try to re-configure your network and in case you still experience the same issue, please provide us your adapter's details - ethtool -i
Sincerely,
Sandy