From owner-freebsd-questions Sun Oct 22 19: 9: 4 2000 Delivered-To: freebsd-questions@freebsd.org Received: from donkeykong.gpcc.itd.umich.edu (donkeykong.gpcc.itd.umich.edu [141.211.2.163]) by hub.freebsd.org (Postfix) with ESMTP id 26DBF37B4C5 for ; Sun, 22 Oct 2000 19:09:02 -0700 (PDT) Received: from gorf.gpcc.itd.umich.edu (smtp@gorf.gpcc.itd.umich.edu [141.211.2.147]) by donkeykong.gpcc.itd.umich.edu (8.8.8/4.3-mailhub) with ESMTP id WAA13993; Sun, 22 Oct 2000 22:09:01 -0400 (EDT) Received: from localhost (timcm@localhost) by gorf.gpcc.itd.umich.edu (8.8.8/5.1-client) with ESMTP id WAA14761; Sun, 22 Oct 2000 22:09:00 -0400 (EDT) Date: Sun, 22 Oct 2000 22:09:00 -0400 (EDT) From: Tim McMillen X-Sender: timcm@gorf.gpcc.itd.umich.edu To: David Raistrick Cc: freebsd-questions@FreeBSD.ORG Subject: Re: On the subject of BSD based routers... In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Sun, 22 Oct 2000, David Raistrick wrote: > How many 10baseT interfaces could i reasonably have? Lets say I were to > use some of the 4 port cards. Could i put 6 of those in a box and access > all 24 ports? (provided i had 6 pci slots..) > Can the PCI bus handle that much data? Well a PCI bus running at 33MHZ gives 33HZ*64bit / 8bits/byte ~= 250MBytes/sec max *theoretical* output the 24 10baseT nics work out to 10*10^6 /8 *24 ~= 28MB/sec and the 100's to 280MB/sec which is past the PCI bus limit. Theoretical throughtputs are almost never reached so who knows. Correct me if I'm wrong but nobody does it this way right? Wouldn't a multiport switch be used and then one connection from that to a box with aliases to handle the different IP's and incoming connections? Tim > A few rambled questions....looking for comments:) > -- > David Raistrick Digital Wireless Communications > davidr@dwcinet.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message