From owner-freebsd-questions@FreeBSD.ORG Fri Jul 8 11:00:50 2011 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id E45271065781 for ; Fri, 8 Jul 2011 11:00:50 +0000 (UTC) (envelope-from mexas@bristol.ac.uk) Received: from dirg.bris.ac.uk (dirg.bris.ac.uk [137.222.10.102]) by mx1.freebsd.org (Postfix) with ESMTP id 9DE0E8FC13 for ; Fri, 8 Jul 2011 11:00:50 +0000 (UTC) Received: from ncsc.bris.ac.uk ([137.222.10.41]) by dirg.bris.ac.uk with esmtp (Exim 4.72) (envelope-from ) id 1Qf8nN-000625-Ca; Fri, 08 Jul 2011 12:00:39 +0100 Received: from mech-cluster241.men.bris.ac.uk ([137.222.187.241]) by ncsc.bris.ac.uk with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.72) (envelope-from ) id 1Qf8n0-0000se-1e; Fri, 08 Jul 2011 12:00:06 +0100 Received: from mech-cluster241.men.bris.ac.uk (localhost [127.0.0.1]) by mech-cluster241.men.bris.ac.uk (8.14.4/8.14.4) with ESMTP id p68B05TL034967; Fri, 8 Jul 2011 12:00:05 +0100 (BST) (envelope-from mexas@bristol.ac.uk) Received: (from mexas@localhost) by mech-cluster241.men.bris.ac.uk (8.14.4/8.14.4/Submit) id p68B050b034966; Fri, 8 Jul 2011 12:00:05 +0100 (BST) (envelope-from mexas@bristol.ac.uk) X-Authentication-Warning: mech-cluster241.men.bris.ac.uk: mexas set sender to mexas@bristol.ac.uk using -f Date: Fri, 8 Jul 2011 12:00:05 +0100 From: Anton Shterenlikht To: "C. P. Ghost" Message-ID: <20110708110005.GD34870@mech-cluster241.men.bris.ac.uk> Mail-Followup-To: "C. P. Ghost" , freebsd-questions@freebsd.org References: <20110707224435.GA27624@mech-cluster241.men.bris.ac.uk> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.4.2.3i Cc: freebsd-questions@freebsd.org Subject: Re: tftp - bad checksum error? can't transfer file X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 08 Jul 2011 11:00:51 -0000 On Fri, Jul 08, 2011 at 12:05:37PM +0200, C. P. Ghost wrote: > On Fri, Jul 8, 2011 at 12:44 AM, Anton Shterenlikht wrote: > > I'm trying to troubleshoot tftpd(8). > > (...) > > > ? ?192.168.232.10.15388 > buzi.tftp: [no cksum] ?25 RRQ "/bsd.rd.IP32" octet ( > > o > > 23:25:21.024160 IP (tos 0x0, ttl 64, id 56, offset 0, flags [none], proto UDP (1 > > 7), length 30, bad cksum 0 (->293a)!) > > ? ?buzi.19330 > 192.168.232.10.15388: [udp sum ok] UDP, length 2 > > 23:25:51.013759 IP (tos 0x0, ttl 255, id 256, offset 0, flags [none], proto UDP > > (17), length 53) > > I've had some trouble netbooting / jumpstaring recently with a similar > pattern (using RARP/BOOTP/TFTP/NFS). It turned out to be a dying > port on the switch whose errors were masked by TCP in day to day > use, but alas were too frequent for UDP. I just have a direct ethernet connection between my FreeBSD laptop with bootpd/tftpd servers (one ethernet port only) and a node which I want to boot (also a single ethernet port). Is there way for me to check whether either of these ports are "dying"? Any further diagnostics I can do? Many thanks Anton -- Anton Shterenlikht Room 2.6, Queen's Building Mech Eng Dept Bristol University University Walk, Bristol BS8 1TR, UK Tel: +44 (0)117 331 5944 Fax: +44 (0)117 929 4423