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Hello,

I hope everyone is doing fine.

I've been troubleshooting a case where Windows OS(2012,2016,2019) is several times slower on network throughput perspective compared to any Linux distro. Iperf3 was used as a testing tool (1 TCP session for 30 seconds)

I've tried tweaking several driver options and changing ISP, no success.

So I thought I should investigate this issue with WireShark, however, I don't have a Linux dump to share with you, but compared to Windows there are way fewer TCP errors.

Here's a Windows dump

These types of errors are all across the dump, except at the begging of a session (network speed is highest at that point also).

My NIC: Intel(R) Ethernet 10G 4P X520/I350 rNDC

I've even tried several different servers with different NICs(X550).

Has anyone here experienced such an issue with Windows OS?

Hello,

I hope everyone is doing fine.

I've been troubleshooting a case where Windows OS(2012,2016,2019) is several times slower on network throughput perspective compared to any Linux distro. Iperf3 was used as a testing tool (1 TCP session for 30 seconds)

I've tried tweaking several driver options and changing ISP, no success.

So I thought I should investigate this issue with WireShark, however, I don't have a Linux dump to share with you, but compared to Windows there are way fewer TCP errors.

Here's a Windows dump

These types of errors are all across the dump, except at the begging of a session (network speed is highest at that point also).

My NIC: Intel(R) Ethernet 10G 4P X520/I350 rNDC

I've even tried several different servers with different NICs(X550).

Has anyone here experienced such an issue with Windows OS?

EDIT: Attaching a screenshot with TCP handshake options.