Date: Thu, 17 Feb 2022 17:50:33 +0000 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 Message-ID: <bug-246003-7501-obxlUryEFE@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-246003-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-246003-7501@https.bugs.freebsd.org/bugzilla/>
next in thread | previous in thread | raw e-mail | index | archive | help
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D246003 Joshua Kinard <kumba@gentoo.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Resolution|Overcome By Events |Not A Bug --- Comment #8 from Joshua Kinard <kumba@gentoo.org> --- 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.=
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?bug-246003-7501-obxlUryEFE>