From nobody Thu Feb 17 17:50:33 2022 X-Original-To: net@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 6A82819E0411 for ; Thu, 17 Feb 2022 17:50:34 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4K02RZ1mk4z4hfP for ; Thu, 17 Feb 2022 17:50:34 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org (kenobi.freebsd.org [IPv6:2610:1c1:1:606c::50:1d]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 1CE285B7C for ; Thu, 17 Feb 2022 17:50:34 +0000 (UTC) (envelope-from bugzilla-noreply@freebsd.org) Received: from kenobi.freebsd.org ([127.0.1.5]) by kenobi.freebsd.org (8.15.2/8.15.2) with ESMTP id 21HHoYta035406 for ; Thu, 17 Feb 2022 17:50:34 GMT (envelope-from bugzilla-noreply@freebsd.org) Received: (from www@localhost) by kenobi.freebsd.org (8.15.2/8.15.2/Submit) id 21HHoYm1035405 for net@FreeBSD.org; Thu, 17 Feb 2022 17:50:34 GMT (envelope-from bugzilla-noreply@freebsd.org) X-Authentication-Warning: kenobi.freebsd.org: www set sender to bugzilla-noreply@freebsd.org using -f From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [Bug 246003] em(4): Intel I219-V6 on NUC8i5BEH randomly loses carrier or fails over to 100Mbit Date: Thu, 17 Feb 2022 17:50:33 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: Base System X-Bugzilla-Component: kern X-Bugzilla-Version: 12.1-RELEASE X-Bugzilla-Keywords: IntelNetworking X-Bugzilla-Severity: Affects Only Me X-Bugzilla-Who: kumba@gentoo.org X-Bugzilla-Status: Closed X-Bugzilla-Resolution: Not A Bug X-Bugzilla-Priority: --- X-Bugzilla-Assigned-To: kbowling@freebsd.org X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: resolution Message-ID: In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: https://bugs.freebsd.org/bugzilla/ Auto-Submitted: auto-generated List-Id: Networking and TCP/IP with FreeBSD List-Archive: https://lists.freebsd.org/archives/freebsd-net List-Help: List-Post: List-Subscribe: List-Unsubscribe: Sender: owner-freebsd-net@freebsd.org MIME-Version: 1.0 ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1645120234; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=KtbRGgZhk5duAhhBPasrk7u/8y3VNoQhSUmUUnIxipY=; b=QuRmogiVRXCJ1EYgGWkJi1lQ4kxBnpMyH4Un5ie3/6hpPG6DKvQrWGQs1uiT/ib4ejzN/7 XHV9oadAh65TtmMOH47dGKwNL0pOV3BitxgfCSpZASwTj9mvSA9CjfcThfpKDDMtvLkZj/ l0vqnQgmv8z0hYsI3ILI05eSlgntyUPgz698pXo/Wy/81nyZ+gfXXRIhEa5z/rrU4o1H+b yYAbYN/JkZyRTFOE96UbvYfLz7AiEnotJHLEEprPisuqYwXVdGzuJ2T03fV03LSAHbHnyN q2vlct95y5aw2BuMCVGOAU0ANdkWjfzSrE5wVWcNZk884I0kRSO6wFMDR8yDUw== ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1645120234; a=rsa-sha256; cv=none; b=sixYdjA6D3iYuxWSlc1AC5vWTbcDO/Cl88/0XT1bMPFkGxMwqPRDGPzMVdAw7sKLuXlYiH fdKyQ2floDzGtKaeRER3VSBabnoj8z0NYxLccekaNIGhhOoO2lpSUc/Ggdg/hmd+F5hrT6 lv2mDfko1eTw1XARgwVYw+URWfI78Boq7lwoWjjhSHx1l7oykgMiZt4z2jakBrh/YGT8vh +UgyqJTSckRUdPmAVqLT8YaO4C8FasRKIJj4GMG4iEF702VIVztwoNGFYPK7NxptYYDnK+ l/hqyvjKEMaCZkjWcagNTZ6cimyMuM4o5ezwK56g08/vECNTj3Gnyp705uXjkg== ARC-Authentication-Results: i=1; mx1.freebsd.org; none X-ThisMailContainsUnwantedMimeParts: N https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246003 Joshua Kinard changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|Overcome By Events |Not A Bug --- Comment #8 from Joshua Kinard --- Just to add a final resolution and to mark this as a hardware issue and not= a bug in FreeBSD, the problem ultimately turned out to be the 1ft CAT6A Monop= rice SlimRun cable I was using to connect the NUC to my 24-port switch. I learned awhile ago that swapping to a different cable made the problem go away, but I didn't know why. After finally finding where my cable tester w= as hidden, I was able to resolve that the slimrun cable had a faulty ground connection between the two ends that was probably creating a ground loop between the switch and the NUC, causing the switch to overreact and either disable the port or drop it to 100mbps, which probably wasn't handled well = by the em(4) driver on the NUC. --=20 You are receiving this mail because: You are on the CC list for the bug.=