From owner-freebsd-bugs@freebsd.org Thu Apr 14 15:35:09 2016 Return-Path: Delivered-To: freebsd-bugs@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 58112B10214 for ; Thu, 14 Apr 2016 15:35:09 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2001:1900:2254:206a::16:76]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4909E10E5 for ; Thu, 14 Apr 2016 15:35:09 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from bugs.freebsd.org ([127.0.1.118]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id u3EFZ9Vl014596 for ; Thu, 14 Apr 2016 15:35:09 GMT (envelope-from bugzilla-noreply@freebsd.org) From: bugzilla-noreply@freebsd.org To: freebsd-bugs@FreeBSD.org Subject: [Bug 208803] ixgbe(4) reports wrong IPv4 checksum when txcsum is enabled Date: Thu, 14 Apr 2016 15:35:09 +0000 X-Bugzilla-Reason: AssignedTo X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 10.3-RELEASE X-Bugzilla-Keywords: X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: n+freebsd@nirf.de X-Bugzilla-Status: New X-Bugzilla-Resolution: X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: freebsd-bugs@FreeBSD.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version rep_platform op_sys bug_status bug_severity priority component assigned_to reporter cc Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 X-BeenThere: freebsd-bugs@freebsd.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: Bug reports List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Apr 2016 15:35:09 -0000 https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D208803 Bug ID: 208803 Summary: ixgbe(4) reports wrong IPv4 checksum when txcsum is enabled Product: Base System Version: 10.3-RELEASE Hardware: amd64 OS: Any Status: New Severity: Affects Only Me Priority: --- Component: kern Assignee: freebsd-bugs@FreeBSD.org Reporter: n+freebsd@nirf.de CC: freebsd-amd64@FreeBSD.org CC: freebsd-amd64@FreeBSD.org I've got Silicom 10G Ethernet cards, which use the ixgbe(4) driver. When tx= csum is enabled, outgoing IPv4 packets show up in tcpdump on the sending host as having a wrong checksum. However the packets appear to be sent with the cor= rect checksum. On the receiving host, no checksum errors are detected. I've tested this with multiple different cards (single port and dual port) = on different machines. pciconf shows them as: ix0@pci0:12:0:0: class=3D0x020000 card=3D0xa05f8086 chip=3D0x10c7808= 6 rev=3D0x01 hdr=3D0x00 vendor =3D 'Intel Corporation' device =3D '82598EB 10-Gigabit AF Network Connection' class =3D network subclass =3D ethernet --=20 You are receiving this mail because: You are the assignee for the bug.=