From owner-freebsd-net@FreeBSD.ORG Thu Oct 21 16:36:07 2004 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 878B916A4CE for ; Thu, 21 Oct 2004 16:36:07 +0000 (GMT) Received: from mail.netroad.ru (mail.netroad.ru [213.24.172.7]) by mx1.FreeBSD.org (Postfix) with ESMTP id AB78E43D41 for ; Thu, 21 Oct 2004 16:36:06 +0000 (GMT) (envelope-from devel@proxy.netroad.ru) Received: from mail.netroad.ru (localhost [127.0.0.1]) by mail.netroad.ru (Postfix) with ESMTP id 263E514860B; Thu, 21 Oct 2004 20:34:40 +0400 (MSD) Received: from proxy.netroad.ru (proxy.netroad.ru [213.24.172.2]) by mail.netroad.ru (Postfix) with ESMTP id 051371485FF; Thu, 21 Oct 2004 20:34:40 +0400 (MSD) Received: by proxy.netroad.ru (Postfix, from userid 999) id C78CB256214; Thu, 21 Oct 2004 20:36:01 +0400 (MSD) Date: Thu, 21 Oct 2004 20:36:01 +0400 From: "Lenar D. Tukhvatullin" To: "William D. Colburn (aka Schlake)" Message-ID: <20041021163601.GA88117@proxy.netroad.ru> Mail-Followup-To: "William D. Colburn (aka Schlake)" , freebsd-net@freebsd.org References: <20041021145654.GA19657@nmt.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20041021145654.GA19657@nmt.edu> User-Agent: Mutt/1.5.5.1i X-AntiVirus: ClamAV at mail.netroad.ru cc: freebsd-net@freebsd.org Subject: Re: 9 second ping lag unless I run tcpdump on RELENG_5 X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Oct 2004 16:36:07 -0000 On Thu, Oct 21, 2004 at 08:56:54AM -0600, William D. Colburn (aka Schlake) wrote: > I have a RELENG_5 box on my desk. Unless I run the tcpdump program, it > responds progressively slower on the network. This seemed like the most > appropriate list to post this question too. > > This morning, for instance, it had a 9 second ping response time from a > machine on the same network segment as it when I came into work. As > soon as I typed 'tcpdump' on the freebsd box the ping time dropped to > nearly instantaneous. I killed tcpdump and let it run for a while. > About a thousand seconds later it suddenly jumped to 1 second, then to 2 > seconds. As soon as I ran tcpdump again it dropped back to normal. > > The uname ids it as 5.3-STABLE #14: Wed Oct 20 10:23:11 UTC 2004, > with a GENERIC kernel. I did a new cvsup (along with a tcpdump because > otherwise cvsup fails) this morning and nothing new came across. tcpdump (by default) puts interface into promiscuous mode. (or you can set this mode by hand: ifconfig promisc) Maybe your ethernet card broken? Try to replace it. -- Lenar D. Tukhvatullin