Date: Sun, 22 Oct 2000 22:09:00 -0400 (EDT) From: Tim McMillen <timcm@umich.edu> To: David Raistrick <keen@damoe.wireless-isp.net> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: On the subject of BSD based routers... Message-ID: <Pine.SOL.4.10.10010222151470.935-100000@gorf.gpcc.itd.umich.edu> In-Reply-To: <Pine.BSF.4.21.0010222129070.19416-100000@damoe.wireless-isp.net>
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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
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