Date: Tue, 10 Oct 2000 18:34:25 -0500 (CDT) From: Mike Meyer <mwm@mired.org> To: "ROTHENBERG, MICHAEL" <MROTHENBERG@exchange1.PRIA.com> Cc: Alfred Perlstein <bright@wintelcom.net>, questions@freebsd.org Subject: RE: ethernet config (Was: Network trickles ......) Message-ID: <14819.42881.989809.335493@guru.mired.org> In-Reply-To: <CB5D74F381BDD311944F0000F802076603A1CB78@EXCHANGE1> References: <CB5D74F381BDD311944F0000F802076603A1CB78@EXCHANGE1>
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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, <mike > -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 <mwm@mired.org> [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<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500 > inet 192.168.1.130 netmask 0xffffff00 broadcast 192.168.1.255 > ether 00:d0:09:fc:5a:e6 > media: autoselect (100baseTX <full-duplex>) status: active > supported media: autoselect 100baseTX <full-duplex> 100baseTX > 10baseT/UTP <full-duplex> 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, > <mike > > > > 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
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