Date: Sat, 5 Mar 2005 10:56:01 +0100 From: Wilko Bulte <wb@freebie.xs4all.nl> To: sthaug@nethelp.no Cc: stable@freebsd.org Subject: Re: 1000baseTX? Message-ID: <20050305095601.GA4821@freebie.xs4all.nl> In-Reply-To: <21136.1110016329@bizet.nethelp.no> References: <20050304233814.U4084@carver.gumbysoft.com> <21136.1110016329@bizet.nethelp.no>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sat, Mar 05, 2005 at 10:52:09AM +0100, sthaug@nethelp.no wrote.. > > > In man pages, dmesg and ifconfig of FreeBSD5, GbE operation over > > > twisted pair is mostly referred as '1000baseTX'. I guess most of them > > > should be replaced by '1000baseT'. 1000base"TX" and 1000base"T" are > > > different standard and they are not compatible ("TX" needs CAT6 cable > > > and uses pairs in different way). Also 1000baseTX support is very > > > rare yet. I'm sorry I'm not sure if some devices really support "TX". > > > > Do you have any documentation to back up this claim? > > 1000baseTX was an attempt at producing less expensive hardware (NICs > etc) that could be used with Cat6 cabling. It is basically dead, and > was never blessed by the IEEE. > > The IEEE is quite clear on the fact that Gigabit Ethernet on Cat5 UTP > is called 1000Base-T. See for instance Chapter 34, "Introduction to > 1000 Mb/s baseband network", in IEEE 802.3-2002, available from > > http://standards.ieee.org/getieee802/802.3.html > > So using 1000baseTX as the name in FreeBSD is clearly wrong. Probably just as right or wrong as 99% of the NIC cards docs. Next to every gigE card I have had my hands one mandated at least CAT5e but generally preference was expressed for CAT6. -- Wilko Bulte wilko@FreeBSD.org
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050305095601.GA4821>