Strange network behaviour

[William Ashworth]

You are correct...it is a duplex mismatch.  The ifconfig isn't set sorrectly
cause I just fixed the same problem thanks to this list.

What kind of NIC are you using?  I will send the proper command

Thanks,
Will


----- Original Message -----
From: "Lowell Gilbert" <freebsd-questions-local at be-well.no-ip.com>
To: "Vincent Zee" <basics at zenzee.cistron.nl>
Cc: "FreeBSD Questions" <freebsd-questions at freebsd.org>
Sent: Wednesday, April 09, 2003 4:07 PM
Subject: Re: Strange network behaviour


> Vincent Zee <basics at zenzee.cistron.nl> writes:
>
> > On 09 Apr 2003 16:39:03 -0400, Lowell Gilbert wrote:
> > > Vincent Zee <basics at zenzee.cistron.nl> writes:
> > >
> > >>  I am really at a loss at the moment.
> > >>
> > >>  I have a 100baseT network at home and all connected machines have
100Mb
> > >>  network cards.
> > >>  When I upload mp3 files from my ibook to the FreeBSD server the
speed
> > >>  drops to 100kb/s.
> > >>
> > >>  This only happens between these two particular machines. These same
> > >>  machines connected to other machines give the expected transmission
> > >>  speeds. I checked cables, switches and router but found nothing
> > >>  unexpected.
> > >>
> > >>  Any hints, ideas or even solutions are most welcome.
> > >>
> > >>  The FreeBSD machine is running 4.7 and the ibook 10.2.4
> > >
> > > This sounds a lot like a duplex mismatch.
> > > Check the collision count.
> >
> > Hi Lowell,
> >
> > thank you for your answer(:-))
> >
> > Here is the ifconfig output for the nic in the freebsd machine:
> >
> > dc0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> >         inet 192.168.1.10 netmask 0xffffff00 broadcast 192.168.1.255
> >         inet6 fe80::248:54ff:fe12:c767%dc0 prefixlen 64 scopeid 0x1
> >         ether 00:48:54:12:c7:67
> >         media: Ethernet autoselect (100baseTX <full-duplex>)
> >         status: active
> >
> > Here is the ifconfig output for the nic in the ibook:
> >
> > en0: flags=8863<UP,BROADCAST,SMART,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> >         inet6 fe80::20a:95ff:fe67:2460%en0 prefixlen 64 scopeid 0x4
> >         inet 192.168.1.3 netmask 0xffffff00 broadcast 192.168.1.255
> >         ether 00:0a:95:67:24:60
> >         media: autoselect (100baseTX <full-duplex>) status: active
> >         supported media: none autoselect 10baseT/UTP <half-duplex>
> > 10baseT/UTP <half-duplex,hw-loopback> 10baseT/UTP <full-duplex>
> > 10baseT/UTP <full-duplex,hw-loopback> 100baseTX <half-duplex> 100baseTX
> > <half-duplex,hw-loopback> 100baseTX <full-duplex> 100baseTX <full-
> > duplex,hw-loopback>
> >
> >
> > Here is the output of netstat -i during a transmission of a 14 MB file.
> >
> > -bash-2.05b$ netstat -i
> > Name  Mtu   Network       Address            Ipkts Ierrs    Opkts Oerrs
> >  Coll
> > dc0   1500  <Link#1>    00:48:54:12:c7:67  5734078     0  5911495     0
> >     0
> > dc0   1500  192.168.1     freeserv         5728716     -  5910566     -
> >     -
> > dc0   1500  fe80:1::248 fe80:1::248:54ff:        0     -        0     -
> >     -
> > lp0*  1500  <Link#2>                             0     0        0     0
> >     0
> > faith 1500  <Link#3>                             0     0        0     0
> >     0
> > lo0   16384 <Link#4>                           375     0      375     0
> >     0
> > lo0   16384 ::1         ::1                      0     -        0     -
> >     -
> > lo0   16384 fe80:4::1   fe80:4::1                0     -        0     -
> >     -
> > lo0   16384 your-net      localhost            375     -      375     -
> >     -
> > ppp0* 1500  <Link#5>                             0     0        0     0
> >     0
> > sl0*  552   <Link#6>                             0     0        0     0
> >     0
> >
> > /\
> > Vincent
>
> Okay, so there are no collisions on the FreeBSD side.
> Check whatever it's plugged into (a switch?).
> If *that* thinks the link is half duplex while FreeBSD thinks it's
> full duplex, you've found your problem.
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