From owner-freebsd-questions@FreeBSD.ORG Tue Jan 31 15:11:00 2006 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 2858416A420 for ; Tue, 31 Jan 2006 15:11:00 +0000 (GMT) (envelope-from crispy.beef@ntlworld.com) Received: from mta08-winn.ispmail.ntl.com (mta08-winn.ispmail.ntl.com [81.103.221.48]) by mx1.FreeBSD.org (Postfix) with ESMTP id 3339A43D69 for ; Tue, 31 Jan 2006 15:10:53 +0000 (GMT) (envelope-from crispy.beef@ntlworld.com) Received: from aamta10-winn.ispmail.ntl.com ([81.103.221.35]) by mta08-winn.ispmail.ntl.com with ESMTP id <20060131151052.MVAI8724.mta08-winn.ispmail.ntl.com@aamta10-winn.ispmail.ntl.com>; Tue, 31 Jan 2006 15:10:52 +0000 Received: from [192.168.0.2] (really [82.12.83.224]) by aamta10-winn.ispmail.ntl.com with ESMTP id <20060131151052.QAHX21315.aamta10-winn.ispmail.ntl.com@[192.168.0.2]>; Tue, 31 Jan 2006 15:10:52 +0000 Message-ID: <43DF7DFA.9050507@ntlworld.com> Date: Tue, 31 Jan 2006 15:10:50 +0000 From: Crispy Beef User-Agent: Mozilla Thunderbird 1.0.7 (X11/20051017) X-Accept-Language: en-us, en MIME-Version: 1.0 To: Chuck Swiger References: <8C7F4678970ACD2-1EFC-9D50@mblkn-m01.sysops.aol.com> <43DF6C94.7090404@mac.com> In-Reply-To: <43DF6C94.7090404@mac.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: freebsd-questions@freebsd.org Subject: Re: How many IP address aliases can practically be used on one physical Ethernet interface? 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: Tue, 31 Jan 2006 15:11:00 -0000 Chuck Swiger wrote: > Use BPF or libnet to generate test traffic using spoofed IPs, rather than > actually configuring a machine with thousands of IPs. There are also companies > which make hardware IP traffic generators, if you want to buy a solution rather > than building one. Have done a quick search on these and found the docs for libnet, can't seem to find much on BPF. I could really do with a solution for testing a server under heavy load, I'm aware of the mod for Apache (flood I think) but I don't have the option of using that right now. Would one of the above allow me to simulate multiple - hundreds or thousands - clients accessing a server? The main reason is that I've recompiled apache to up the hard limit of MaxClients, the machine has 2Gb or RAM so should be able to handle plenty of connections but I'd like to see at what point it would fall over. -- Cheers, Paul