From owner-freebsd-questions@freebsd.org Wed Aug 2 18:12:08 2017 Return-Path: Delivered-To: freebsd-questions@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 77566DAF8A9 for ; Wed, 2 Aug 2017 18:12:08 +0000 (UTC) (envelope-from tundra@tundraware.com) Received: from oceanview.tundraware.com (oceanview.tundraware.com [45.55.60.57]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mailman.tundraware.com", Issuer "mailman.tundraware.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id E8C7970012 for ; Wed, 2 Aug 2017 18:12:06 +0000 (UTC) (envelope-from tundra@tundraware.com) Received: from [192.168.0.2] (ozzie.tundraware.com [75.145.138.73]) (authenticated bits=0) by oceanview.tundraware.com (8.15.2/8.15.2) with ESMTPSA id v72IBx3W097883 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO); Wed, 2 Aug 2017 13:12:00 -0500 (CDT) (envelope-from tundra@tundraware.com) Subject: Re: Adapter em0 link state changing down/up on 11.1 To: Ernie Luzar , "freebsd-questions@freebsd.org" References: <59821410.2060309@gmail.com> From: Tim Daneliuk Message-ID: <24d2160d-b414-7194-d512-79dadc087640@tundraware.com> Date: Wed, 2 Aug 2017 13:11:54 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.2.1 MIME-Version: 1.0 In-Reply-To: <59821410.2060309@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.6.2 (oceanview.tundraware.com [45.55.60.57]); Wed, 02 Aug 2017 13:12:00 -0500 (CDT) X-TundraWare-MailScanner-Information: Please contact the ISP for more information X-TundraWare-MailScanner-ID: v72IBx3W097883 X-TundraWare-MailScanner: Found to be clean X-TundraWare-MailScanner-SpamCheck: not spam (whitelisted), SpamAssassin (not cached, score=-0.885, required 1, autolearn=not spam, ALL_TRUSTED -1.00, AWL 0.12, T_RP_MATCHES_RCVD -0.01) X-TundraWare-MailScanner-From: tundra@tundraware.com X-Spam-Status: No X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 02 Aug 2017 18:12:08 -0000 On 08/02/2017 01:04 PM, Ernie Luzar wrote: > Hello List; > > Running 11.1 and em0 is a Intel Pro/1000. > I keep getting these messages > Kernel: em0: Link state changed to Down > Kernel: em0: Link state changed to Up > > This happens 3 to 8 times during a 24 hour period. > em0 is connected to the public internet and this down/up cycle > disconnects all browser connections that are active. > > What can I do to fix this? I seem to recall seeing this same problem on a 9.x or 10.x system. In my case the fix was to replace a failed component. For the life of me I cannot recall whether it was the NIC, the cable, or the switch. As a first step, at least, I'd swap cables. If that doesn't fix it, move it to a different switch port - or better still, a different switch entirely. -- ---------------------------------------------------------------------------- Tim Daneliuk tundra@tundraware.com PGP Key: http://www.tundraware.com/PGP/ -- This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean.