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Hello,
We are comparing Ethernet cards and routing high UDP traffic (500Mbps) over 1GB network. It appears the 219i-V drops packets. We have an application consuming this traffic, and some is being dropped. It is unclear why the 219i-V has such an issue. The 219i-LM works with no problem.
We see this issue for the laptop mainly. If the same version of the card (219i-V) runs on PCIe, we don't see the issue.
I am attaching the Ethernet driver reference
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Hello @mtoumi,
Thank you for posting in Intel Ethernet Communities.
We are sorry to hear about the bad experience with Intel® Ethernet Connection I219-V. Let's see how we can help from here on.
Introduction of Intel® Ethernet Connection I219:
- Intel® Ethernet Connection I219-LM, order code# WGI219LM:
Usually Corporate LAN product with support for Intel® vPro™ technology, Intel® AMT, Energy Efficient Ethernet (802.3az), Intel® SIPP, Server operating system support, ACBS and standard gigabit networking features.
- Intel® Ethernet Connection I219-V, order code# WGI219V:
Consumer LAN product with support for Energy Efficient Ethernet (802.3az), ACBS and standard gigabit networking features.
May I suggest these recommendation:
1) Update the driver and system bios to latest version. Since the issue happens mainly on laptop, the Intel® Ethernet Controller is embedded on Original Equipment Manufacturer (OEM) system, it's best to check with the manufacturer as the software drivers linked from Intel page are generic versions, and can be used for general purposes. To avoid any potential installation incompatibilities on OEM system, Intel recommends checking with the OEM and use the software provided via system manufacturer.
2) Test if the Intel® Ethernet Connection I219-V can reach more than 900Mbps in Safe Mode.
3) Lower the value or turn off interrupt moderation as this is best for handling many small packets so the driver is more responsive to incoming and outgoing packets.
4) You can also try to disable or change the values for mentioned property with the following steps:
a. Open Device Manager.
b. Double-click Network adapter: Intel Ethernet Connection I219-V
c. Click on the "Advanced" tab, change values for following property-
- Energy Efficient Ethernet (EEE) to "Off"
- Ultra Low Power Mode to "Disabled"
- Large Send Offload V2 (IPv4) to "Disabled"
- Large Send Offload V2 (IPv6) to "Disabled"
- TCP Checksum Offload (IPv4) to "Tx Enabled"
- TCP Checksum Offload (IPv6) to "Tx Enabled"
- Flow control to "Disabled"
- Speed & Duplex to "Auto Negotiation"
(Forcing link can result in a speed-duplex mismatch. This is common when one device is set to forced and its link partner is set as Auto-Negotiate.)
5) Disable Allow the computer to turn off this device to save power on advanced properties of the Intel® Ethernet Controller.
6) If the system comes with TurboLAN Cfos, disable the service called cFosSpeed System Service. Closing the program doesn't make any difference, as that service keeps running in the background.
7) Run netsh int tcp set global autotuninglevel=normal on command prompt to check if the issue is bug related to Windows Auto Tuning
-Right click on the network / Wi-Fi icon at system tray.
-Choose Open Network & Internet Settings and navigate to Advanced Network Settings.
-Select Change Adapter Options to view all network cards installed on computer.
-Right click on Intel® Ethernet Connection I219-V and select Properties.
-Find Internet Protocol v6 (TCP/IPv6) from the list under Networking tab, and disable it.
Looking forward to your response.
Best regards,
BY_Intel
Intel Customer Support
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Hello @mtoumi,
I hope this message finds you well. I am just sending a follow up if you have any questions from the previous post. If so, please let us know. Thank you.
Best regards,
BY_Intel
Intel Customer Support
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Hello @mtoumi,
Please be informed that we will now close this request since we haven't received any response from our previous follow ups. Just feel free to post a new question if you may have any other inquiry in the future as this thread will no longer be monitored.
Best regards,
BY_Intel
Intel Customer Support
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Dear Intel,
We are still working out the details of the original request. We should have more information soon. Thank you!

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