From owner-freebsd-net@FreeBSD.ORG Sun Mar 2 15:11:31 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 78DA9106566C for ; Sun, 2 Mar 2008 15:11:31 +0000 (UTC) (envelope-from if@xip.at) Received: from chile.gbit.at (ns1.xip.at [193.239.188.99]) by mx1.freebsd.org (Postfix) with ESMTP id BC3208FC25 for ; Sun, 2 Mar 2008 15:11:30 +0000 (UTC) (envelope-from if@xip.at) Received: (qmail 5657 invoked from network); 2 Mar 2008 16:11:28 +0100 Received: from unknown (HELO filebunker.xip.at) (86.59.10.180) by chile.gbit.at with (DHE-RSA-AES256-SHA encrypted) SMTP; 2 Mar 2008 16:11:28 +0100 Date: Sun, 2 Mar 2008 16:11:28 +0100 (CET) From: Ingo Flaschberger To: Barney Cordoba In-Reply-To: <497111.42659.qm@web63905.mail.re1.yahoo.com> Message-ID: References: <497111.42659.qm@web63905.mail.re1.yahoo.com> User-Agent: Alpine 1.00 (LFD 882 2007-12-20) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed Cc: 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: Sun, 02 Mar 2008 15:11:31 -0000 Dear Bareney, >> 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? Have you ever read the link? Have you noticed that the axiomtek appliance has 7 gigabit ports? Each one connected with 1 lane pci-e? > The lack of PCIe cards is a good reason to consider a > PCIX machine. On the systems that we have, the 1x PCIe > ports are a lot slower than a PCI-X card in the slot. Perhaps, but: pci-x: 4gbit for the whole bus system. pci-e: 2gbit/lane > 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. sample1: 3 pci-cards: card 1: 1x = 2gbit (dedicated) card 2: 1x = 2gbit (dedicated) card 3: 1x = 2gbit (dedicated) -------------------- sum: 6gbit (but the use only 3) sample2: 2 pci-x cards card 1: 4gbit (shared) card 2: 4gbit (shared) card 3: 4gbit (shared) --------------------- sum: 4gbit homework: calculate with 7 ports. Kind regards, Ingo Flaschberger