From owner-freebsd-questions@FreeBSD.ORG Sun Jun 5 05:06:45 2005 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1201016A41C for ; Sun, 5 Jun 2005 05:06:45 +0000 (GMT) (envelope-from jpp@cloudview.com) Received: from skipjack.no-such-agency.net (skipjack.no-such-agency.net [64.142.114.146]) by mx1.FreeBSD.org (Postfix) with ESMTP id D82AA43D48 for ; Sun, 5 Jun 2005 05:06:44 +0000 (GMT) (envelope-from jpp@cloudview.com) Received: from skipjack.no-such-agency.net (localhost [127.0.0.1]) by skipjack.no-such-agency.net (Postfix) with ESMTP id 6663434D435; Sat, 4 Jun 2005 22:06:41 -0700 (PDT) Received: from [192.168.2.120] (blackhole.no-such-agency.net [64.142.103.196]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by skipjack.no-such-agency.net (Postfix) with ESMTP id 9E06434D415; Sat, 4 Jun 2005 22:06:39 -0700 (PDT) Message-ID: <42A2885F.8080409@cloudview.com> Date: Sat, 04 Jun 2005 22:06:39 -0700 From: John Pettitt User-Agent: Mozilla Thunderbird 1.0.2 (Windows/20050317) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Karan Gupta References: <42A28734.3080805@edgefocus.com> In-Reply-To: <42A28734.3080805@edgefocus.com> X-Enigmail-Version: 0.91.0.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-AV-Checked: by skipjack Cc: freebsd-questions@freebsd.org Subject: Re: Weird ping times 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: Sun, 05 Jun 2005 05:06:45 -0000 Karan Gupta wrote: > Hi > I have a router setup with fBSD > #### uname output ######## > FreeBSD aaa.xxx.com 5.4-RELEASE FreeBSD 5.4-RELEASE #0: Wed May 25 > 15:08:04 PDT 2005 root@:/usr/src/sys/i386/compile/EFKERNEL i386 > > When i ping this machine from different networks i get the following > timings > > [snip] > > Alternate good and bad times!!! I rebooted the machine to no effect. > The problem seems to go away on its own for a few hours & then comes > back. I ran tcpdump & saw nothing different between the times this > behaviour was seen & the times it wasnt. > > The machine is running IPFW, isc-dhcp server and nat. > > > Any thoughts?? > does traceroute yield anything interesting? (from either end?) - ping times over a second sounds like a routing problem maybe outside the machine. I've also seen weird results with machines hat have USB serial ports on them where the machine dies for up to 16 seconds then comes back and all the ping packets come back at once with delays from a few ms to 16 seconds in one second steps.