Date: Fri, 26 Aug 2022 10:59:52 +0000 From: bugzilla-noreply@freebsd.org To: bugs@FreeBSD.org Subject: [Bug 266048] [ixgbe] 82599ES reports IPv4 UDP as input errors Message-ID: <bug-266048-227@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D266048 Bug ID: 266048 Summary: [ixgbe] 82599ES reports IPv4 UDP as input errors Product: Base System Version: CURRENT Hardware: Any OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: bugs@FreeBSD.org Reporter: ae@FreeBSD.org After https://reviews.freebsd.org/D27191 ixgbe(4) uses sum of all errors registers in the IFCOUNTER_IERRORS. Especially IXGBE_XEC is now included in this sum. And now we have noticeable input errors rate: % netstat -hw1 -I ix0 input ix0 output packets errs idrops bytes packets errs bytes colls 7.7k 14 0 2.0M 4.3k 0 1.9M 0 16k 20 0 27M 30k 0 29M 0 10k 40 0 18M 20k 0 19M 0 12k 23 0 18M 21k 0 20M 0 ^C % sysctl dev.ix.0 | grep errs dev.ix.0.mac_stats.checksum_errs: 25190176 dev.ix.0.mac_stats.rec_len_errs: 0 dev.ix.0.mac_stats.byte_errs: 0 dev.ix.0.mac_stats.ill_errs: 0 dev.ix.0.mac_stats.crc_errs: 0 dev.ix.0.mac_stats.rx_errs: 25190176 % pciconf -l | grep ^ix0 ix0@pci0:6:0:0: class=3D0x020000 card=3D0x00068086 chip=3D0x10fb8086 rev=3D= 0x01 hdr=3D0x00 I found similar report about OpenSense: https://forum.opnsense.org/index.php?topic=3D27051.0 It looks like 82599ES has errata related to IPv4 UDP packets and zero check= sum: 44. Integrity Error Reported for IPv4/UDP Packets With Zero Checksum Problem:According to the UDP specification =E2=80=9Can all zero transmitte= d checksum value means that the transmitter generated no checksum (for debugging or for hig= her level protocols that don=E2=80=99t care)=E2=80=9D, these packets should be= received without a checksum error notation. The 82599 reports an L4 integrity error if such packets are received. Implication: UDP packets without a checksum will have an L4 integrity error indication in the Rx descriptor. See also: https://bugzilla.redhat.com/show_bug.cgi?id=3D1922430 --=20 You are receiving this mail because: You are the assignee for the bug.=
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