Date: Sat, 1 Mar 2008 23:57:27 +0100 From: Erik Trulsson <ertr1013@student.uu.se> To: Barney Cordoba <barney_cordoba@yahoo.com> Cc: Ingo Flaschberger <if@xip.at>, net@freebsd.org Subject: Re: FBSD 1GBit router? Message-ID: <20080301225727.GA85851@owl.midgard.homeip.net> In-Reply-To: <497111.42659.qm@web63905.mail.re1.yahoo.com> References: <alpine.LFD.1.00.0803012014350.20402@filebunker.xip.at> <497111.42659.qm@web63905.mail.re1.yahoo.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, Mar 01, 2008 at 01:27:46PM -0800, Barney Cordoba wrote: > > --- Ingo Flaschberger <if@xip.at> 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. -- <Insert your favourite quote here.> Erik Trulsson ertr1013@student.uu.se
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20080301225727.GA85851>