UDP checksum offload does not work in Azure if following conditions are met: - sizeof(IP hdr + UDP hdr + payload) > 1420. - IP_DF is not set in IP hdr Use software checksum for UDP datagrams falling into this category. Add two tunables to disable UDP/IPv4 and UDP/IPv6 checksum offload, in case something unexpected happened. MFC after: 1 week Sponsored by: Microsoft Differential Revision: https://reviews.freebsd.org/D12429 |
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