​Known Issues

Known issues for Windows OS and all Intel® Ethernet products can be found in the following locations:

1. ​Known Issues section of the Release Notes, packaged with the Intel® Ethernet Adapter Complete Driver Pack.

   The file is located in the root folder of the software download package.

2. ​Known Issues section of the Intel® Ethernet Adapters and Devices User Guide, Section 9.0.

3. ​Additional Known Issues, specific to the Windows OS and Intel® 700/800 Series devices:

   • ​Intel® Advanced Networking Services (ANS) is supported on Microsoft Windows 2012 R2 and earlier, to configure Adapter Teaming.

     Intel® ANS is not supported on Microsoft Windows Server 2016 and later.

     Mitigation: See ​Adapter Teaming for the steps to configure Adapter Teaming on Windows Server 2016 and later.

   • ​Creating Switch Independent Teaming in a Microsoft Service (GUI) does not support SR-IOV. However, it does spawn a Virtual Machine Queue (VMQ) Virtual Network Interface Card (vNIC) on the VM. This can result in lower VM performance than a configuration that does support SR-IOV to spawn a VF vNIC on the VM. Note:Switch Independent teaming is only supported on Windows VM and is not supported on Linux VM.
   • ​GUI Teaming and SET vSwitch:
     • GUI Teaming is available for both Windows VM and Linux VM. Windows VM supports VMQ and allows the creation of VMQ vNICs within the VM. However, VMQ is not supported in Linux VM. Additionally, GUI teaming does not support SR-IOV, which is a critical feature for Linux VM.
     • ​SET vSwitch is available in Windows Server 2016 and later, and offers advanced teaming capabilities for both Windows VM and Linux VM. It supports SR-IOV, allowing the creation of virtual functions (VF) for the VM vNIC, which is compatible with Linux VM as well. However, it is worth noting that the VMQ is a feature specific to Windows VM and might not be relevant for Linux VM.
   • ​Driver versions i40ea 1.16.130 and later provide low throughput numbers in Windows 2022 Hyper-V VM when vSwitch is set to a Switch Independent Teaming Interface without SR-IOV enabled.

     Mitigation: Use i40ea version 1.18.367.0 (or later).

   • If Hyper-Threading is enabled in BIOS, the driver does not utilize the hyper-threaded cores for RSS, and this can impact performance for applications using both physical and logical (HT) cores.
   • icea drivers provide low throughput numbers in Windows 11 due to the missing registries: RssBaseProcNumber, NumaNodeId, and MaxRssProcessors, in the INF file.