Date: Fri, 12 Apr 2002 08:49:33 -0400 From: "Gerald A. Speak" <gaspeak@va.prestige.net> To: Luke Schapel <lschapel@bigpond.com>, Anthony Atkielski <anthony@freebie.atkielski.com> Cc: FreeBSD Questions <freebsd-questions@FreeBSD.ORG> Subject: Re: Variable Ethernet speeds between machines? Message-ID: <20020412124942.900C637B404@hub.freebsd.org> In-Reply-To: <3CB6D16D.C0C8AB45@bigpond.com> References: <009f01c1e216$44a311a0$0a00000a@atkielski.com> <3CB6D16D.C0C8AB45@bigpond.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On Friday 12 April 2002 08:22 am, Luke Schapel wrote: > Anthony > > Could be the switch. > Have you tried different ports? > > Luke > Just a thought, you may also have a flakey cable. I would suggest making sure that your cables are rated at CAT5e as opposed to CAT5, and try exchanging cables between your three machines. Speak > Anthony Atkielski wrote: > > This is only partially a FreeBSD question, but I thought people here > > might be more likely to know what's going on. > > > > I have three machines on my LAN: a FreeBSD 4.3 server, a Windows NT > > Server desktop, and a Windows XP desktop. Each of the machines has a > > 10/100 Mbps full-duplex Ethernet NIC. The machines are connected via > > CAT5 coax to a 3Com Ethernet switch that is supposed to detect the cable > > type (crossover or straight) and speed (10 or 100) automagically. The > > mystery I encounter is that transfers over the LAN between the NT machine > > and the FreeBSD machine never appear to exceed 10 Mbps, but transfers > > between the FreeBSD machine and the XP machine, or between the XP machine > > and the NT machine, easily reach a full 100 Mbps. > > > > Anyone have any idea why this is? I'd expect the transfers with a given > > machine to always run at the same speed (if the other machine is capable > > of that speed). So if NT transfers to XP (or vice versa) at 100 Mbps, > > then it should do the same with FreeBSD--but it doesn't. And yet all of > > the machines are clearly capable of 100 Mbps transfers. What's going on? > > > > I don't think FreeBSD is responsible for the discrepancy; I'm just trying > > to figure out what might be different about the FreeBSD/NT transfers that > > might cause them to run at 10 Mbps instead of 100 Mbps. As I've said, > > FreeBSD transfers at the full 100 Mbps with the XP machine, and so does > > the NT machine. Very strange! > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20020412124942.900C637B404>