From owner-freebsd-net@FreeBSD.ORG Sat May 17 19:38:50 2003 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 CAA8937B401; Sat, 17 May 2003 19:38:50 -0700 (PDT) Received: from lariat.org (lariat.org [63.229.157.2]) by mx1.FreeBSD.org (Postfix) with ESMTP id CDDB143F93; Sat, 17 May 2003 19:38:49 -0700 (PDT) (envelope-from brett@lariat.org) Received: from mustang.lariat.org (IDENT:ppp1000.lariat.org@lariat.org [63.229.157.2]) by lariat.org (8.9.3/8.9.3) with ESMTP id UAA20714; Sat, 17 May 2003 20:38:42 -0600 (MDT) X-message-flag: Warning! Use of Microsoft Outlook renders your system susceptible to Internet worms. Message-Id: <4.3.2.7.2.20030517203058.02ddaa90@localhost> X-Sender: brett@localhost X-Mailer: QUALCOMM Windows Eudora Version 4.3.2 Date: Sat, 17 May 2003 20:32:26 -0600 To: Lars Eggert From: Brett Glass In-Reply-To: <3EC681DB.1050109@isi.edu> References: <200305171831.MAA17776@lariat.org> <200305171831.MAA17776@lariat.org> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii"; format=flowed cc: truckman@FreeBSD.org cc: net@FreeBSD.org Subject: Re: Ping results are sometimes wrong 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: Sun, 18 May 2003 02:38:51 -0000 At 12:39 PM 5/17/2003, Lars Eggert wrote: >Various link layers have different characteristics. Trying to optimize >the averaging algorithm based on the specific behavior of one particular >link layer is probably not useful for a network layer tool like ping. True. But the first ping is, in most cases, not going to be representative. So, it pays to throw it away if you're compiling statistics of any sort. --Brett