From owner-freebsd-questions@FreeBSD.ORG Mon May 31 09:34:00 2004 Return-Path: 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 B74AE16A4CE for ; Mon, 31 May 2004 09:34:00 -0700 (PDT) Received: from out010.verizon.net (out010pub.verizon.net [206.46.170.133]) by mx1.FreeBSD.org (Postfix) with ESMTP id 542C843D1F for ; Mon, 31 May 2004 09:34:00 -0700 (PDT) (envelope-from cswiger@mac.com) Received: from [192.168.1.3] ([68.161.84.3]) by out010.verizon.net (InterMail vM.5.01.06.06 201-253-122-130-106-20030910) with ESMTP id <20040531163349.YNKF15848.out010.verizon.net@[192.168.1.3]>; Mon, 31 May 2004 11:33:49 -0500 Message-ID: <40BB5E6D.3050408@mac.com> Date: Mon, 31 May 2004 12:33:49 -0400 From: Chuck Swiger Organization: The Courts of Chaos User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7) Gecko/20040514 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Technical Director References: <20040530224910.S980@server1.ultratrends.com> In-Reply-To: <20040530224910.S980@server1.ultratrends.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit X-Authentication-Info: Submitted using SMTP AUTH at out010.verizon.net from [68.161.84.3] at Mon, 31 May 2004 11:33:48 -0500 cc: questions@FreeBSD.ORG Subject: Re: 3Com 3c905B-TX Fast EtherLink XL Packet Loss X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 31 May 2004 16:34:00 -0000 Technical Director wrote: [ ... ] > 3Com 3c905B-TX showing up as xl0 > > plugged in using a etl certified (whooie) cat-5e to: > > Linksys EtherFast 4116 > > Using ping -f /{some address}/, I've noticed at these configured speeds > the following: > > 10baseT/UTP half-duplex == 11% packet loss > 10baseT/UTP full-duplex == 30% packet loss > 100baseTX half-duplex == 70-80% packet loss > 100baseTX full-duplex == 95-99% packet loss Some older cards simply won't handle the data rate of a flood ping; if you can do something like: ping -s 1000 -i 0.001 _address_ ...without packet loss, it's probably fine to use for normal purposes. The only other response I can think to give is to try swapping in a high-end card like a fxp. -- -Chuck