On Mon, Dec 08, 2003 at 06:42:28AM -0600, Harry Putnam wrote:
> "Marcel J.E. Mol" <marcel@xxxxxxx> writes:
>
> >> The "-HD" = Half duplex = kiss of death for speed. This usually
> >> indicates either a bad cable or an incorrectly configured network
> >> box. We'd had problems with DEC/Compaq AlphaStations in this regard.
> >> The solution was generally to configure your network box and/or workstation
> >> to 100baseT/Full and *don't* let it autonegotiate.
> >
> > As far as I know you get only HD when conected to a hub. When connected to
> > a switch you should get FD.
>
> Do you know any more about why that might be the case?
Not from my head. I noticed the difference a while ago and asked
a REAL networking specialist about it. He did explain it but I forgot
the details. The important think to remember was that hubs connect at
half duplex and swithces can do both half and full duplex. And this
is exactly what I see: At home I half a 10Mb hub and have HD connections,
and the offices has a swithc and I see FD connections.
Most of the time is not a problem.
I have no problems running NFS over the HD connection (the hub at home
is connected to the switch in the office). Most of the time at home I
NFS-read from the office servers and this goes at 6 to 9 MB/s for large
transfers...
-Marcel
--
======-------- Marcel J.E. Mol MESA Consulting B.V.
=======--------- ph. +31-(0)6-54724868 P.O. Box 112
=======--------- marcel@xxxxxxx 2630 AC Nootdorp
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