Date: Tue, 10 Oct 2000 15:49:32 -0400 From: "ROTHENBERG, MICHAEL" <MROTHENBERG@exchange1.PRIA.com> To: 'Mike Meyer' <mwm@mired.org>, Alfred Perlstein <bright@wintelcom.net> Cc: questions@freebsd.org Subject: RE: ethernet config (Was: Network trickles ......) Message-ID: <CB5D74F381BDD311944F0000F802076603A1CB78@EXCHANGE1>
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*scratch head*
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?
As to Alfred's comment that he has never gotten a hub to go full-duplex and
work correctly I'm not sure I can agree. Have to go home and double check,
but I think I might be running 100baseTX in full-duplex mode into my hub at
home form the FBSD gateway and from the Win boxes.... It would seem to me
that they should be able to make hubs that run full-duplex *shrug* But I
don't have a whole lot of exp in this particular area.
I also have a strange packet error thing I am trying to fix and perhaps this
full/half-duplex with hub thing is related... hehehe I'll test tonight.
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. };)
-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
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