From owner-freebsd-questions Mon Mar 26 21:45:46 2001 Delivered-To: freebsd-questions@freebsd.org Received: from mail.freebsd-corp-net-guide.com (mail.freebsd-corp-net-guide.com [206.29.169.15]) by hub.freebsd.org (Postfix) with ESMTP id C437137B71A for ; Mon, 26 Mar 2001 21:45:41 -0800 (PST) (envelope-from tedm@toybox.placo.com) Received: from tedm.placo.com (nat-rtr.freebsd-corp-net-guide.com [206.29.168.154]) by mail.freebsd-corp-net-guide.com (8.11.1/8.11.1) with SMTP id f2R5jSk46249; Mon, 26 Mar 2001 21:45:28 -0800 (PST) (envelope-from tedm@toybox.placo.com) From: "Ted Mittelstaedt" To: , Subject: RE: Network lockups on fxp0? Date: Mon, 26 Mar 2001 21:45:27 -0800 Message-ID: <000101c0b681$206fad00$1401a8c0@tedm.placo.com> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 Importance: Normal Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG I'd start by looking at what is most common - your network hubs. You may have a failed hub that's trashing packets. Otherwise maybe someone is hitting you with a DoS attack? Ted Mittelstaedt tedm@toybox.placo.com Author of: The FreeBSD Corporate Networker's Guide Book website: http://www.freebsd-corp-net-guide.com >-----Original Message----- >From: owner-freebsd-questions@FreeBSD.ORG >[mailto:owner-freebsd-questions@FreeBSD.ORG]On Behalf Of Deepak Jain >Sent: Monday, March 26, 2001 5:41 PM >To: freebsd-questions@FreeBSD.ORG >Subject: Network lockups on fxp0? > > > >This weekend we started seeing a bunch of new and stable machines (all >4.2-RELEASE) with varying levels of traffic (3mb/s to 15mb/s) withdrawing >their MAC addresses from the network layer: > >fxp0: SCA timeout >fxp0: DMA timeout >(repeating) > >or: > >fxp0: SCB timeout >fxp0: DMA timeout >(repeating) > >Reboots clear it, but the systems are completely responsive at the console. >The strangest thing is that of 10 machines that showed this over the >weekend, machines would lock up in pairs and singles. This, even though the >users on the servers were completely unrelated. 5 locked up in one data >center another 5 in a different one, no other servers anywhere had any >issues. > >These systems are all Tyan Thunder motherboards, with dual integrated sym >controllers (SCSI) and dual integrated fast ethernet (fxp) ports. 1GB RAM, >single and dual hard drives. The kernel's buffers and things are known good >well over 50mb/s and the kernel is identical across all of them as well as >400 other 4.2 machines. No single server has gone down twice yet, so I have >no idea of how long between occurrences. Occurrences don't seem to be >related to traffic flows or system load. > >Any ideas of where to track down these issues? > >Thanks, > > >Deepak Jain >AiNET > > >To Unsubscribe: send mail to majordomo@FreeBSD.org >with "unsubscribe freebsd-questions" in the body of the message > To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message