From owner-freebsd-questions Wed Nov 20 4:34: 4 2002 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 DDA7737B401; Wed, 20 Nov 2002 04:34:02 -0800 (PST) Received: from stewart.chicago.il.us (adsl-67-38-193-238.dsl.chcgil.ameritech.net [67.38.193.238]) by mx1.FreeBSD.org (Postfix) with ESMTP id 343F543E8A; Wed, 20 Nov 2002 04:34:02 -0800 (PST) (envelope-from randall@stewart.chicago.il.us) Received: from stewart.chicago.il.us (stewart.chicago.il.us [127.0.0.1]) by stewart.chicago.il.us (8.12.6/8.12.3) with ESMTP id gAKCXtLM004094; Wed, 20 Nov 2002 06:33:55 -0600 (CST) (envelope-from randall@stewart.chicago.il.us) Message-ID: <3DDB8133.4030205@stewart.chicago.il.us> Date: Wed, 20 Nov 2002 06:33:55 -0600 From: Randall Stewart User-Agent: Mozilla/5.0 (X11; U; FreeBSD i386; en-US; rv:1.0rc3) Gecko/20020922 X-Accept-Language: en-us, en MIME-Version: 1.0 To: shubha mr Cc: freebsd-questions@FreeBSD.ORG, freebsd-net@FreeBSD.ORG Subject: Re: duplicate packets in ping? References: <20021120122521.45873.qmail@web41201.mail.yahoo.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG shubha mr wrote: > Ping on my device driver (for my NIC )gives duplicate > packets.does anyone know why they occur and how to > eliminate them? > thanks > shubha > > __________________________________________________ > Do You Yahoo!? > Everything you'll ever need on one web page > from News and Sport to Email and Music Charts > http://uk.my.yahoo.com > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-net" in the body of the message > > I have noticed a similar occurance in some of my SCTP testing with all of the BSD's. In particular the linksys pcmcia cards seem to do this. In my testing and analysis this always seems to occur when the card is busy and what happens is you lose some packet and another appears to be duplicated... I traced this out with ethereal a while ago and then just stopped using that card when I figured out it was some sort of circular buffer issue.. I did not dig in and find out if it was the card or driver... I rather suspect it is the card (since it is a low end one).. but one never knows... R -- Randall R. Stewart randall@stewart.chicago.il.us 815-342-5222 (cell phone) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message