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TalDew-1499 avatar image
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TalDew-1499 asked TalDew-1499 answered

Netstat Segments Retransmitted stuck at zero

Hi,

When I type netstat -s at the command prompt one of the output lines is "Segments Retransmitted".
Lately I noticed that the value is stuck at zero (for both IPv4 and IPv6).

When I run a speed test and open Wireshark I see occasional TCP retransmissions as expected, but I do not see any change in the "Segments Retransmitted" in the netstat output (for both IPv4 and IPv6).
The same behavior occurs in the "Performance Monitor" app.

Note that "Segments Retransmitted" used to work fine for me until a few months ago on the same computer and in the same network.

Will appreciate your help.

Thanks,
Tal.

windows-10-network
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SunnyQi-MSFT avatar image
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SunnyQi-MSFT answered GaryNebbett commented

Hi,

Thanks for posting in Q&A platform.

Before we go further, may I know if we have changed any settings on the problematic device before the issue occurred?

Whether the retransmission TCP segments were sent by the problematic client in Wireshark result?

Best Regards,
Sunny


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Hello @SunnyQi-MSFT,

I have the same problem too - "netstat -s" and "netsh int ipv4 show tcpstats" now seem to always show 0 for retransmitted segments (MIB_TCPSTATS dwRetransSegs), even when there is clear evidence that segments have been retransmitted.

This might be a widespread problem that few people have noticed. I am running 20H2 10.0.19042.928.

Gary

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TalDew-1499 avatar image
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TalDew-1499 answered

Hi @SunnyQi-MSFT

Thanks for the quick response.

I am not aware of any new settings, other than the regular windows updates - the PC is up to date.

Yes, the TCP retransmissions in Wireshark were from the local client to the speed test server.

Thanks,
T.

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