From owner-freebsd-questions Tue Oct 10 16:34:30 2000 Delivered-To: freebsd-questions@freebsd.org Received: from guru.mired.org (okc-27-149-77.mmcable.com [24.27.149.77]) by hub.freebsd.org (Postfix) with SMTP id 8B36D37B503 for ; Tue, 10 Oct 2000 16:34:26 -0700 (PDT) Received: (qmail 60322 invoked by uid 100); 10 Oct 2000 23:34:26 -0000 From: Mike Meyer MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <14819.42881.989809.335493@guru.mired.org> Date: Tue, 10 Oct 2000 18:34:25 -0500 (CDT) To: "ROTHENBERG, MICHAEL" Cc: Alfred Perlstein , questions@freebsd.org Subject: RE: ethernet config (Was: Network trickles ......) In-Reply-To: References: X-Mailer: VM 6.72 under 21.1 (patch 10) "Capitol Reef" XEmacs Lucid X-face: "5Mnwy%?j>IIV\)A=):rjWL~NB2aH[}Yq8Z=u~vJ`"(,&SiLvbbz2W`;h9L,Yg`+vb1>RG% *h+%X^n0EZd>TM8_IB;a8F?(Fb"lw'IgCoyM.[Lg#r\ Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG ROTHENBERG, MICHAEL writes: > ifconfig shows that you are in fact running 100baseTX full-duplex. What does > the product spec say for your hub thing? Can it run that? since you are on > autoselect and the card selected 100baseTX I would assume that your hub > thing can also do that and negotiated with the card. Which should be all you > need to have happen. > > You indicate that you read the man page for xl. The device is dc. Are they > the same? The hub thing says the LAN side is a switch, so full duplex ought to be ok. The dc and xl pages are different. I changed the test box halfway through, and didn't fix that part of my message. I described the dc man page. The xl man page allows both "full-duplex" and "half-duplex" for media options. > I think the interesting thing is that you can swap OS's and get wildly > better performance. What does the ifconfig say on those others? Its got to > be a settings thing and not really related to the OS itself. Its probably an > 'oh duh' answer that we will kick ourselves for when found. };) That's not me; I'm just trying to figure out if I could get better performance by forcing my NIC's to half duplex mode. Thanx, -Michael > > -----Original Message----- > From: Mike Meyer [mailto:mwm@mired.org] > Sent: Tuesday, October 10, 2000 2:19 PM > To: Alfred Perlstein > Cc: questions@freebsd.org > Subject: Re: ethernet config (Was: Network trickles ......) > > > Alfred Perlstein writes: > > * Mike Meyer [001010 10:09] wrote: > > > Alfred Perlstein writes: > > > > The most switches can auto-negotiate so that if you're set up > > > > incorrectly you should be ok, however the real killer is trying to > > > > use full-duplex on a hub, which never seems to work. > > > What's the failure in that case? Just slow? Or something deadly? > > Degraded performance, ranging from packetloss to being unable to > > achieve any sort of packet transmission/recieving. > > Ok, now I'm realy confused. I think I'm seeing about the same > performance through an LinkSys Etherfast hub/router box as I was with > an X-over cable before (~1.2MBytes/sec). On the other hand, I'm > willing to try anything that might improve performance. The ifconfig > output for one of the interfaces is: > > dc0: flags=8843 mtu 1500 > inet 192.168.1.130 netmask 0xffffff00 broadcast 192.168.1.255 > ether 00:d0:09:fc:5a:e6 > media: autoselect (100baseTX ) status: active > supported media: autoselect 100baseTX 100baseTX > 10baseT/UTP 10baseT/UTP none > > The "media:" line looks to me like the card is running 100baseTX in > full duplex mode. The man page for the xl claims that the only media > option is "full-duplex", and without it the interface runs in half > duplex mode. The rc.conf line for the interface just sets the inet > address & netmask; nothing else gets done. Trying to set the media > options while the system running doesn't change the ifconfig > output. Adding "-mediaopt full-duplex" to the rc.conf file and > rebooting doesn't change it either. > > So either 1) I'm misreading the line, or 2) I need to be told how to > set the interface to half-duplex, as the man page is wrong. > > Thanx, > > > > 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