"TCP Window Full" warnings in Windows Wireshark when Win11 ms-nfs41-client talks to FreeBSD NFSD
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Date: Fri, 26 Jun 2026 09:48:26 UTC
We get lots of "TCP Window Full" warnings in Wireshark running Windows 11 when ms-nfs41-client has mounted shares from a FreeBSD 16.0-CURRENT NFSD. The wireshark output looks like this: 69477 1330.696175200 192.168.132.130 192.168.202.239 TCP 14654 [TCP Window Full] 600 → 2049 [ACK] Seq=41611537 Ack=18103445 Win=65279 Len=14600 [TCP PDU reassembled in 69488] Windows has TCP Window scaling enabled, and uses 8MB send/recv TCP buffers. How can I debug, or fix this issue? Aurélien -- Aurélien Couderc <aurelien.couderc2002@gmail.com> Big Data/Data mining expert, chess enthusiast