From owner-freebsd-questions@FreeBSD.ORG Mon Sep 21 02:41:39 2009 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 447541065679 for ; Mon, 21 Sep 2009 02:41:39 +0000 (UTC) (envelope-from Olivier.Nicole@cs.ait.ac.th) Received: from mail.cs.ait.ac.th (mail.cs.ait.ac.th [192.41.170.16]) by mx1.freebsd.org (Postfix) with ESMTP id E57C88FC1B for ; Mon, 21 Sep 2009 02:41:38 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mail.cs.ait.ac.th (Postfix) with ESMTP id 5BAD63A3869; Mon, 21 Sep 2009 09:41:36 +0700 (ICT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=cs.ait.ac.th; h= references:subject:subject:in-reply-to:from:from:message-id:date :date:received:received:received; s=selector1; t=1253500896; x= 1255315296; bh=WsK8alp/yDaHmLkTgRuso5JEE76jTg5TiN+EH5AnqLo=; b=P qCM6BEGNeeultySztJ/bWMQWJcvut9rezAgFPCkh5pMyMYAaJHJ6PMlaqu7F8ArX MUwgqP7PxqyHCU5Ow1F7Nh40VmLzaH2/XpWsZqYy4rJImRWKDnh8m+ZJKphW65RH yFmoCSYfJsdjEVswMzJcInMRQfRijOGSl4n0l9hF4w= X-Virus-Scanned: amavisd-new at cs.ait.ac.th Received: from mail.cs.ait.ac.th ([127.0.0.1]) by localhost (mail.cs.ait.ac.th [127.0.0.1]) (amavisd-new, port 10026) with ESMTP id vZWkRoqTQLOX; Mon, 21 Sep 2009 09:41:36 +0700 (ICT) Received: from banyan.cs.ait.ac.th (banyan.cs.ait.ac.th [192.41.170.5]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by mail.cs.ait.ac.th (Postfix) with ESMTPS id A32083A383C; Mon, 21 Sep 2009 09:41:35 +0700 (ICT) Received: (from on@localhost) by banyan.cs.ait.ac.th (8.14.3/8.14.3/Submit) id n8L2fVTG002381; Mon, 21 Sep 2009 09:41:31 +0700 (ICT) (envelope-from on) Date: Mon, 21 Sep 2009 09:41:31 +0700 (ICT) Message-Id: <200909210241.n8L2fVTG002381@banyan.cs.ait.ac.th> From: Olivier Nicole To: james@tanis.us In-reply-to: <7640F3CC-586D-4087-A78B-DF43F515A8E4@tanis.us> (message from James Tanis on Fri, 18 Sep 2009 06:03:38 -0400) References: <7640F3CC-586D-4087-A78B-DF43F515A8E4@tanis.us> Cc: freebsd-questions@freebsd.org Subject: Re: dhcpd related issues 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: Mon, 21 Sep 2009 02:41:39 -0000 Hi James, > I have a FreeBSD 7.0 gateway/server with isc-dhcpd 3.1.2p1_2. Late > yesterday I began having some unique and intermittent issues. > Basically, random computers will all of a sudden lose their dhcp > leases and be unable to contact the dhcp server. I did not see any reply to your question. It happened to me that a secondary switch was working badly with DHCP. If I rebooted the switch, it would work for a while, then fail again. But that was a sort of random failure, some ports would be affected sometime. The problem would occur a the first lease in the morning rather than at renewal time. As it was a cheap switch, unmanageable, I replaced it. > Sep 17 14:03:15 grendel dhcpd: ICMP Echo reply while lease > 192.168.1.253 valid. > Sep 17 15:25:19 grendel dhcpd: ICMP Echo Reply for 192.168.1.74 late > or spurious. > > which doesn't seem particularly relevant or heinous. Many more > computers than the ones above have been affected. I don't remember ever seeing such error, but I would think that late or spurions is not that innocent: it could be the symptom of a switch not working at its nominal speed. Of course you could also consider a computer on that switch being infected by some kind of virus and generating so much traffic it takes your switch out. Bests, Olivier