Date: Mon, 16 Nov 1998 14:02:59 +0200 From: Ruslan Ermilov <ru@ucb.crimea.ua> To: "Nick A. Fikouras" <nick@dcs.shef.ac.uk> Cc: lubnazia@cyberaccess.com.pk, freebsd-questions@FreeBSD.ORG Subject: Re: bandwith monitor for unix freebsd Message-ID: <19981116140259.D1664@ucb.crimea.ua> In-Reply-To: <3650090F.104E728B@dcs.shef.ac.uk>; from Nick A. Fikouras on Mon, Nov 16, 1998 at 11:14:23AM %2B0000 References: <364A749A.6261@cyberaccess.com.pk> <3650090F.104E728B@dcs.shef.ac.uk>
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On Mon, Nov 16, 1998 at 11:14:23AM +0000, Nick A. Fikouras wrote: > > > Lubna Zia wrote: > > > Can we somehow control the bandwith being used by the customers at an > > ISP with the help of any relevant s/w tool available for unix freebsd? > > Is there a bandwith monitor available for unix freebsd? > > > > When we are talking about TCP/IP network, as far as I know IP is a best > effort protocol. That is, it performs its best to deliver traffic as fast > as it can. It is this characteristic of IP that makes it impossible (with > the current router infrastructure) to reserve or allocate bandwidth in the > Internet. > > I hope this has been of help, > > nick Not exactly true. If you are running either of -stable, 3.0 or -current you can utilize the new dummynet(4). In short, * * dummynet - Flexible bandwidth manager and delay emulator * * dummynet is a system facility that permits the control of traffic going * through the various network interfaces, by applying bandwidth and queue * size limitations, and simulating delays and losses. * * In its current implementation, packet selection is done with the ipfw * program, by means of ``pipe'' rules. A dummynet pipe is characterized by * a bandwidth, delay, queue size, and loss rate, which can be configured * with the ipfw program. Pipes are numbered from 1 to 65534, and packets * can be passed through multiple pipes depending on the ipfw configuration. * Best regards, -- Ruslan Ermilov Sysadmin and DBA of the ru@ucb.crimea.ua United Commercial Bank +380.652.247.647 Simferopol, Ukraine http://www.FreeBSD.org The Power To Serve http://www.oracle.com Enabling The Information Age To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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