From owner-freebsd-net@FreeBSD.ORG Sat Mar 1 23:12:58 2008 Return-Path: Delivered-To: net@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 796ED106566C for ; Sat, 1 Mar 2008 23:12:58 +0000 (UTC) (envelope-from erikt@midgard.homeip.net) Received: from ch-smtp02.sth.basefarm.net (ch-smtp02.sth.basefarm.net [80.76.149.213]) by mx1.freebsd.org (Postfix) with ESMTP id EA1148FC16 for ; Sat, 1 Mar 2008 23:12:57 +0000 (UTC) (envelope-from erikt@midgard.homeip.net) Received: from c83-253-25-183.bredband.comhem.se ([83.253.25.183]:61088 helo=falcon.midgard.homeip.net) by ch-smtp02.sth.basefarm.net with esmtp (Exim 4.68) (envelope-from ) id 1JVae2-0008Nn-7T for net@freebsd.org; Sat, 01 Mar 2008 23:57:30 +0100 Received: (qmail 1411 invoked from network); 1 Mar 2008 23:57:27 +0100 Received: from owl.midgard.homeip.net (10.1.5.7) by falcon.midgard.homeip.net with ESMTP; 1 Mar 2008 23:57:27 +0100 Received: (qmail 85918 invoked by uid 1001); 1 Mar 2008 23:57:27 +0100 Date: Sat, 1 Mar 2008 23:57:27 +0100 From: Erik Trulsson To: Barney Cordoba Message-ID: <20080301225727.GA85851@owl.midgard.homeip.net> Mail-Followup-To: Barney Cordoba , Ingo Flaschberger , net@freebsd.org References: <497111.42659.qm@web63905.mail.re1.yahoo.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <497111.42659.qm@web63905.mail.re1.yahoo.com> User-Agent: Mutt/1.5.17 (2007-11-01) X-Originating-IP: 83.253.25.183 X-Scan-Result: No virus found in message 1JVae2-0008Nn-7T. X-Scan-Signature: ch-smtp02.sth.basefarm.net 1JVae2-0008Nn-7T 0d896a05fafc0c0c329cb007a2002ffc Cc: Ingo Flaschberger , net@freebsd.org Subject: Re: FBSD 1GBit router? X-BeenThere: freebsd-net@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 01 Mar 2008 23:12:58 -0000 On Sat, Mar 01, 2008 at 01:27:46PM -0800, Barney Cordoba wrote: > > --- Ingo Flaschberger wrote: > > > Dear Barney, > > > > > It seems absolutely ridiculous to buy such > > hardware > > > and not install a PCIx or 4x PCIe card for another > > > $100. or less. Saying a 1x is "fast enough" is > > like > > > saying a Celeron is "fast enough". > > > > The box is a small 1HE appliance and can boot from a > > CF-Card. > > I trust them more than a "al cheapo" pc. > > 1x axiomtek NA-820 > > 1x P4 3Ghz cpu > > 1x 1gb ddr2 > > --- > > 850eur without taxes. > > > > A good chipset, good cpu, good ram, good harddisk, > > god powersupply has > > same price. > > And don't forget that in exchanges you pay for each > > HE. > > > > And back to 1x is not fast enough: > > There are no 1gbit single port network cards that > > support more than 1 > > lane, even if you plug it into a 16 lane slot. > > (and I'm not talking about 10gbit cards; if you have > > 10gbit upstream you > > have enough $$ to buy good gear) > > Ok, well I've never seen a router with 1 port. I > thought we were talking about building a router? He did not say anything about a single port router. He talked about single port network cards. You can use more than one of them when building a router. > > The lack of PCIe cards is a good reason to consider a > PCIX machine. What lack of PCI-E cards? These days there are quite a few to choose between. > On the systems that we have, the 1x PCIe > ports are a lot slower than a PCI-X card in the slot. > > You need 4Gb/s of throughput to handle a gigablt > router. (1 GB/s full duplex times 2). 1x is 4Gb/s > maximum. In my view, you always need twice the > bandwidth on the bus to avoid contention issues. What contention issues? With PCI-E each device is essentially on its own bus and does not need to contend with other devices for bandwidth on that bus. A PCI-E 1x connection provides more bandwidth than one gigabit ethernet connection can use. -- Erik Trulsson ertr1013@student.uu.se